The Outlaw Semis class features both Pro Street and 4.1 Pro Stock Level Semi trucks competing against each other in one class. Rules may altered or changed anytime through the season for equalization of the class.
GENERAL RULES
Rules may altered or change anytime thru the season for equalization of the class
1. Vehicle must be stock appearance for that year, model and make of truck. All must have complete
Safety equipment.
2. All competition vehicles must have a firewall between the engine compartment and the driver's
compartment. No holes except for controls. Holes must be no larger than one-half inch larger in
diameter than the control that passes through.
3. Universal joint shields required beyond the rear of the transmission. Must be a solid construction, 5/16”
thick steel minimum and be able to contain debris or direct debris toward the ground. U-joint shields not
required on the inter-axle drive shaft provided the top of the frame between the rears is securely covered
with minimum 1/8” aluminum or steel. One drive shaft loop must be installed on any driveshaft over 36”
long including those with a carrier. Driveshaft loop should be near the center of the shaft and be capable
of keeping the shaft from coming out of the vehicle in the event of breakage.
4. All vehicles must have working brakes on all rear wheels.
5. All fans must have fiberglass blades. A complete shroud must encircle the fan area (360 degrees) and be
securely attached. A heavy fiberglass shroud is highly recommended.
6. Drivers must use a seatbelt when hooked to the sled. Helmet is highly recommended
7. No riders are permitted in trucks at any time. Driver may not leave the driver's seat while the vehicle is on the pulling track. Driver will take all directions from the flagman on the track.
8. Drivers must use a seatbelt and/or shoulder harness when hooked to the sled.
9. All trucks must have a fire extinguisher.
10.At no time may rear drive axles lose contact with the ground while the truck is hooked to the sled.
● If the rear drive axles leave the track surface before beginning forward movement while under Green
Flag.; then the truck will be red flagged and lose one attempt.
● Driver will be informed to maintain contact with the pulling surface. If 2nd attempt results in drive axles
losing contact again then the truck is DQ’d.
11. All Appalachian Outlaw general rules apply
Rules may altered or change anytime thru the season for equalization of the class
1. Vehicle must be stock appearance for that year, model and make of truck. All must have complete
Safety equipment.
2. All competition vehicles must have a firewall between the engine compartment and the driver's
compartment. No holes except for controls. Holes must be no larger than one-half inch larger in
diameter than the control that passes through.
3. Universal joint shields required beyond the rear of the transmission. Must be a solid construction, 5/16”
thick steel minimum and be able to contain debris or direct debris toward the ground. U-joint shields not
required on the inter-axle drive shaft provided the top of the frame between the rears is securely covered
with minimum 1/8” aluminum or steel. One drive shaft loop must be installed on any driveshaft over 36”
long including those with a carrier. Driveshaft loop should be near the center of the shaft and be capable
of keeping the shaft from coming out of the vehicle in the event of breakage.
4. All vehicles must have working brakes on all rear wheels.
5. All fans must have fiberglass blades. A complete shroud must encircle the fan area (360 degrees) and be
securely attached. A heavy fiberglass shroud is highly recommended.
6. Drivers must use a seatbelt when hooked to the sled. Helmet is highly recommended
7. No riders are permitted in trucks at any time. Driver may not leave the driver's seat while the vehicle is on the pulling track. Driver will take all directions from the flagman on the track.
8. Drivers must use a seatbelt and/or shoulder harness when hooked to the sled.
9. All trucks must have a fire extinguisher.
10.At no time may rear drive axles lose contact with the ground while the truck is hooked to the sled.
● If the rear drive axles leave the track surface before beginning forward movement while under Green
Flag.; then the truck will be red flagged and lose one attempt.
● Driver will be informed to maintain contact with the pulling surface. If 2nd attempt results in drive axles
losing contact again then the truck is DQ’d.
11. All Appalachian Outlaw general rules apply
PRO STREET TRUCKS
LEGALITY OF ENTRY
All entries must be appearance of Street Licensed Semi Truck. Truck must be capable of pulling a trailer on the highway.
AIR BAGS/AXLES
1. Only tandem drive axle semi-trucks will be permitted to compete, trucks with triple rear axles or lift axles
are not permitted. Tandem axle spacing must be between 60” and 52”. No front wheel drive will be
permitted. No single axle trucks. No dump trucks. No specialty trucks (well-drilling, wreckers, boom trucks,
etc.) will be permitted to compete.
2. There must be 66” from the center of the tandems to the first obstruction forward such as the back of the
truck cab, toolbox, wet line box, etc.
3. The use of air bags is permitted. However, no air may be added to or removed from the air bags while the
truck is hooked to the weight transfer machine.
4. Trucks with air ride suspension must be equipped with chains or some type of limiting device on both drive axles to prevent the height of the frame from changing during the pull. Air bags can not travel more the 5”inch went fully inflated
5. Chains or limiting devices must be tight (no slack) when the hitch is measured.
6. Four short chains or cables from the side of the frame down to the axle housings is recommended.
7. No chains and binders going up and over the frame rails allowed.
8. The height of the hitch must remain the same from start to finish. Any change in the hitch height will be
cause for disqualification.
9.. All air bags will be fully inflated and then the hitch height will be set.
10. Breakage or failure of a chain or limiting device while hooked to the sled will be cause for
disqualification.
ENGINE AND TRANSMISSION
1. Over 3000 rpm you must have the following safety equipment (RPM will be check at random times)
A) Transmission blanket
B) Guillotine to shut air off. Or kill switch to power to fuel pumps. All safety switch must be securely mounted in rear of truck with two inch ring. Switch my also be activated in cab
C) Two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other and within 12 inches of turbo.
2. Water injection in any form is not permitted. Air to air intercooler only. No ice or water permitted on the
truck during competition. An OEM equipped; liquid cooled after cooler is permitted.
3. No ether, alcohol, nitrous or other combustible (propellant) liquid or combustible material may be injected
into the turbocharger or any part of the air intake system.
4. Turbos are limited to single O.E.M. Turbocharger with an O.E.M 3.6-inch (92 mm) maximum inducer bore
on the atmosphere turbo with O.E.M factory exhaust wheels. The bore will be measured using a 3.65-inch
slug. Compressor wheel must protrude 1/8 inch into the 3.6 bore. Map width enhancement of .180”
maximum is permitted which must be in the O.E.M. location, (no forward facing MWE groove). Any cut,
notched, or etc. turbo wheels/blades will result in a disqualification. Turbo housing must be unaltered
OEM/ Factory with no provision made for extra air flow and/or machining to allow larger turbo wheels in
the housing. No bushing of the inducer is permitted. It is the responsibility of the driver to make the inlet
of the turbo accessible for inspection, Any truck disqualified for this reason will be required to undergo a complete super tech prior to any further competition. Absolutely no refunds for any
illegal turbo found after the class has pulled. Exceptions;
a) A factory 2005-2009 & 2011 CAT twin turbo engine is permitted with the factory-installed non-
altered turbos.
b) Detroit Diesel two-cycle engines may utilize one turbocharger per bank, single-staged only. Must be
AirResearch or Garrett brand only, T18A90 maximum(or its after-market equivalent).
5. All exhaust must exit behind the driver’s compartment (no hood stacks permitted) and must exit vertically.
(Turnout, bull hauler, aussie, etc. stack tips are permitted).
6. Transmissions and rear ends must be commercial semi-truck factory components.
7. Only mechanically activated clutches are permitted. (Hydraulic assists are permitted)
ELECTRONIC FUEL INJECTION SYSTEMS/FUEL INJECTION PUMPS
1. Alteration/modification/replacement of the (OEM) original factory fuel pump is not permitted. No pump
may be modified with Sigma parts. No Billet fuel pumps.
2. A Cummins engine must have a Cummins fuel pump - A Detroit must have a Detroit fuel pump – A Cat
must have a cat fuel pump.
3. No sigma pumps OR MW pumps are permitted. Normal pump diesel is the only fuel permitted in this
class.
HITCHES (hitch may be adjust at any time)
1. All trucks competing in the “Pro Street” Semi class are required to have their own hitching device that is
subject to approval by the head tech official at each event. This hitch must work from the 5th wheel with
the 5th wheel centered between the two rear axles. The hitch must be adjustable so that the height from
the ground to the point of hook is between 26” and 16” + or – 1”. The hitch will be measured when the
truck weighs in AND immediately before the semi hooks to the sled.
2. Centerline of the rear axle to hook point on the semi hitch must be no greater than 7 feet.
3. Fifth Wheel Position- Kingpin/Fifth wheel plate position no further forward then the center of the front
axle and no further back then center between the two axles.
TIRES
1. All tires must be road use approved tires and available to the public. Dual wheels and dual tires must be
used on the rear axles. No chains or cables permitted. No cutting of tires is permitted. Maximum tire size
limited to; 11x24.5 x 8.25 (or) 10 x 22 x 8.25 (or) 315/85R x 22.5. Tread width of 10” per each drive tire.
2. No split rim or wedge lug type wheel allowed. No spoke type wheels. Wheels must be bud type.
WEIGHT OF TRUCK
1. Maximum weight for any truck will be 22,000 lbs. All trucks will be weighed in at all points collecting
events, if the wheelbase is too long to fit all three axles on the scales, the truck may be “spilt” weighed. A
variance of one percent (220 lbs.) will be given ONLY if the truck must be “split” weighed.
2. All trucks shall appear 'road ready'.
3. No hanging weight permitted anywhere on the truck or hitch. No weight boxes on or above the fifth wheel
4. Hidden weights are permitted must not be visible and not below the frame rails . All weights must be securely fastened
5. No weights allowed in cab or bunk
LEGALITY OF ENTRY
All entries must be appearance of Street Licensed Semi Truck. Truck must be capable of pulling a trailer on the highway.
AIR BAGS/AXLES
1. Only tandem drive axle semi-trucks will be permitted to compete, trucks with triple rear axles or lift axles
are not permitted. Tandem axle spacing must be between 60” and 52”. No front wheel drive will be
permitted. No single axle trucks. No dump trucks. No specialty trucks (well-drilling, wreckers, boom trucks,
etc.) will be permitted to compete.
2. There must be 66” from the center of the tandems to the first obstruction forward such as the back of the
truck cab, toolbox, wet line box, etc.
3. The use of air bags is permitted. However, no air may be added to or removed from the air bags while the
truck is hooked to the weight transfer machine.
4. Trucks with air ride suspension must be equipped with chains or some type of limiting device on both drive axles to prevent the height of the frame from changing during the pull. Air bags can not travel more the 5”inch went fully inflated
5. Chains or limiting devices must be tight (no slack) when the hitch is measured.
6. Four short chains or cables from the side of the frame down to the axle housings is recommended.
7. No chains and binders going up and over the frame rails allowed.
8. The height of the hitch must remain the same from start to finish. Any change in the hitch height will be
cause for disqualification.
9.. All air bags will be fully inflated and then the hitch height will be set.
10. Breakage or failure of a chain or limiting device while hooked to the sled will be cause for
disqualification.
ENGINE AND TRANSMISSION
1. Over 3000 rpm you must have the following safety equipment (RPM will be check at random times)
A) Transmission blanket
B) Guillotine to shut air off. Or kill switch to power to fuel pumps. All safety switch must be securely mounted in rear of truck with two inch ring. Switch my also be activated in cab
C) Two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other and within 12 inches of turbo.
2. Water injection in any form is not permitted. Air to air intercooler only. No ice or water permitted on the
truck during competition. An OEM equipped; liquid cooled after cooler is permitted.
3. No ether, alcohol, nitrous or other combustible (propellant) liquid or combustible material may be injected
into the turbocharger or any part of the air intake system.
4. Turbos are limited to single O.E.M. Turbocharger with an O.E.M 3.6-inch (92 mm) maximum inducer bore
on the atmosphere turbo with O.E.M factory exhaust wheels. The bore will be measured using a 3.65-inch
slug. Compressor wheel must protrude 1/8 inch into the 3.6 bore. Map width enhancement of .180”
maximum is permitted which must be in the O.E.M. location, (no forward facing MWE groove). Any cut,
notched, or etc. turbo wheels/blades will result in a disqualification. Turbo housing must be unaltered
OEM/ Factory with no provision made for extra air flow and/or machining to allow larger turbo wheels in
the housing. No bushing of the inducer is permitted. It is the responsibility of the driver to make the inlet
of the turbo accessible for inspection, Any truck disqualified for this reason will be required to undergo a complete super tech prior to any further competition. Absolutely no refunds for any
illegal turbo found after the class has pulled. Exceptions;
a) A factory 2005-2009 & 2011 CAT twin turbo engine is permitted with the factory-installed non-
altered turbos.
b) Detroit Diesel two-cycle engines may utilize one turbocharger per bank, single-staged only. Must be
AirResearch or Garrett brand only, T18A90 maximum(or its after-market equivalent).
5. All exhaust must exit behind the driver’s compartment (no hood stacks permitted) and must exit vertically.
(Turnout, bull hauler, aussie, etc. stack tips are permitted).
6. Transmissions and rear ends must be commercial semi-truck factory components.
7. Only mechanically activated clutches are permitted. (Hydraulic assists are permitted)
ELECTRONIC FUEL INJECTION SYSTEMS/FUEL INJECTION PUMPS
1. Alteration/modification/replacement of the (OEM) original factory fuel pump is not permitted. No pump
may be modified with Sigma parts. No Billet fuel pumps.
2. A Cummins engine must have a Cummins fuel pump - A Detroit must have a Detroit fuel pump – A Cat
must have a cat fuel pump.
3. No sigma pumps OR MW pumps are permitted. Normal pump diesel is the only fuel permitted in this
class.
HITCHES (hitch may be adjust at any time)
1. All trucks competing in the “Pro Street” Semi class are required to have their own hitching device that is
subject to approval by the head tech official at each event. This hitch must work from the 5th wheel with
the 5th wheel centered between the two rear axles. The hitch must be adjustable so that the height from
the ground to the point of hook is between 26” and 16” + or – 1”. The hitch will be measured when the
truck weighs in AND immediately before the semi hooks to the sled.
2. Centerline of the rear axle to hook point on the semi hitch must be no greater than 7 feet.
3. Fifth Wheel Position- Kingpin/Fifth wheel plate position no further forward then the center of the front
axle and no further back then center between the two axles.
TIRES
1. All tires must be road use approved tires and available to the public. Dual wheels and dual tires must be
used on the rear axles. No chains or cables permitted. No cutting of tires is permitted. Maximum tire size
limited to; 11x24.5 x 8.25 (or) 10 x 22 x 8.25 (or) 315/85R x 22.5. Tread width of 10” per each drive tire.
2. No split rim or wedge lug type wheel allowed. No spoke type wheels. Wheels must be bud type.
WEIGHT OF TRUCK
1. Maximum weight for any truck will be 22,000 lbs. All trucks will be weighed in at all points collecting
events, if the wheelbase is too long to fit all three axles on the scales, the truck may be “spilt” weighed. A
variance of one percent (220 lbs.) will be given ONLY if the truck must be “split” weighed.
2. All trucks shall appear 'road ready'.
3. No hanging weight permitted anywhere on the truck or hitch. No weight boxes on or above the fifth wheel
4. Hidden weights are permitted must not be visible and not below the frame rails . All weights must be securely fastened
5. No weights allowed in cab or bunk
LIMITED PRO STOCK 4.1 TRUCKS
AXLES
1. Only tandem drive axle semi-trucks will be permitted to compete. Tandem axle spacing must be between
60” and 52”. No front wheel drive will be permitted. No single axle trucks. No dump trucks. No specialty
trucks (well-drilling, wreckers, boom trucks, etc.) will be permitted to compete.
2. Airbags or air springs and/or all mechanical lift mechanisms on front steering axles are NOT permitted.
3. At no time may rear drive axles lose contact with the ground while the truck is hooked to the sled.
● If the rear drive axles leave the track surface before beginning forward movement while under Green
Flag.; then the truck will be red flagged and lose one attempt.
● Driver will be informed to maintain contact with the pulling surface. If 2nd attempt results in drive axles
losing contact again then the truck is DQ’d.
4. Trucks with air ride suspension must be equipped with chains or some type of limiting device on both drive axles to prevent the height of the frame from changing during the pull. Limiting devices must not have any give’ built in. Solid rear drive axle suspension permitted, however all drives must be chained or limited.
Chains or limiting devices must be tight (no slack) when the hitch is measured. Four short chains or cables
from the side of the frame down to the axle housings is recommended. No chains and binders going up
and over the frame rails allowed. Maximum air pressure in the suspension airbags must be limited to
80psi by installing an air pressure regulator in the leveling valve supply line. An air pressure gauge
mounted at the regulator in a visible position must be present to check air pressure. This is done to
prevent breakage of the suspension limiting device or failure of the airbags due to an over pressure
condition. Breakage or failure of a chain or limiting device while hooked to the sled will be cause for
disqualification.
ENGINE AND TRANSMISSION
1. Safety Equipment
A) Transmission blanket
B) Guillotine to shut air off. Or kill switch to power to fuel pumps. All safety switch must be securely mounted in rear of truck with two inch ring. Switch my also be activated in cab
C) Two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other and within 12 inches of turbo.
2. One production-available commercial truck engine ONLY will be permitted. Engines must have been
available over the highway road use trucks. The stock motor block or O.E.M. block that will operate with
the stock crankshaft for that model without any alterations for chassis mounting and in stock location for
that series of semi. NOTE: The legality of the Cummins QSK-19 has been approved since 1998 and is non-
contestable.
3. Turbos are limited to single O.E.M. style Turbocharger with a 4.1” inch maximum inducer bore on the
atmosphere turbo with O.E.M factory exhaust wheels. The bore will be measured using a 4.2” inch slug.
Map width enhancement of .180” maximum is permitted which must be in the O.E.M. location. No type of
non-O.E.M Housing permitted nor are design modifications to allow a larger wheel to be used in the turbo
housing. No Clipped or cut wheels. Exceptions: A factory 2005-2009 & 2011 CAT twin turbo engine is
permitted with the factory-installed non-altered turbos. A truck running an engine under 650 cubic inches
permitted to run twin turbos.
3. Transmissions and rear ends must be commercial semi-truck factory components.
4. Only mechanically activated clutches are permitted. (Hydraulic assists are permitted)
ELECTRONIC FUEL INJECTION SYSTEMS/FUEL INJECTION PUMPS
1. Electronic engine control (ECM) may be O.E.M. or aftermarket.
2. Factory fuel pump or P-Pump is allowed for all trucks. Must not be larger than a P7100. No pump may be
modified with Sigma parts. No Billet fuel pumps.
HITCHES
1. Trucks are required to have their own hitching device that is subject to approval by the head tech official
at each event. This hitch must work from the 5th wheel with the 5th wheel centered between the two
rear axles. The hitch must be adjustable so that the height from the ground to the point of hook is
between 18” and 14” + or – 1”. The hitch will be measured immediately before the semi hooks to the
sled. Hitch design will follow the standard Full Pull Productions Style Hitch.
2. Centerline of the rear axle to hook point on the semi hitch must be no greater than 7 feet.
3. Fifth Wheel Position- Kingpin/Fifth wheel plate position no further forward then the center of the front
axle and no further back then center between the two axles.
WEIGHTS or ADDED BALLAST
1. Maximum weight for any truck will be 20,000 pounds.
2. Weights cannot extend rearward more than 51 inches from the center of the rear axle. (Weights
included)
3. Weights cannot extend more than 24 inches from the farthest point forward of the vehicle.
4. Weights must not interfere with the hooking of the sled to the hitch.
5. No moveable weights are permitted during competition. (Such as hydraulic controlled weight racks or
boxes).
TIRES
1. All tires must be road use approved tires and available to the public. Dual wheels and dual tires must be
used on the rear axles. No chains or cables permitted. No cutting of tires is permitted. Maximum tire
size limited to; 11x24.5 x 8.25 (or) 10 x 22 x 8.25. Tread width of 10” per each drive tire.
2. No split rim or wedge lug type wheel allowed. No spoke type wheels. Wheels must be bud type.
AXLES
1. Only tandem drive axle semi-trucks will be permitted to compete. Tandem axle spacing must be between
60” and 52”. No front wheel drive will be permitted. No single axle trucks. No dump trucks. No specialty
trucks (well-drilling, wreckers, boom trucks, etc.) will be permitted to compete.
2. Airbags or air springs and/or all mechanical lift mechanisms on front steering axles are NOT permitted.
3. At no time may rear drive axles lose contact with the ground while the truck is hooked to the sled.
● If the rear drive axles leave the track surface before beginning forward movement while under Green
Flag.; then the truck will be red flagged and lose one attempt.
● Driver will be informed to maintain contact with the pulling surface. If 2nd attempt results in drive axles
losing contact again then the truck is DQ’d.
4. Trucks with air ride suspension must be equipped with chains or some type of limiting device on both drive axles to prevent the height of the frame from changing during the pull. Limiting devices must not have any give’ built in. Solid rear drive axle suspension permitted, however all drives must be chained or limited.
Chains or limiting devices must be tight (no slack) when the hitch is measured. Four short chains or cables
from the side of the frame down to the axle housings is recommended. No chains and binders going up
and over the frame rails allowed. Maximum air pressure in the suspension airbags must be limited to
80psi by installing an air pressure regulator in the leveling valve supply line. An air pressure gauge
mounted at the regulator in a visible position must be present to check air pressure. This is done to
prevent breakage of the suspension limiting device or failure of the airbags due to an over pressure
condition. Breakage or failure of a chain or limiting device while hooked to the sled will be cause for
disqualification.
ENGINE AND TRANSMISSION
1. Safety Equipment
A) Transmission blanket
B) Guillotine to shut air off. Or kill switch to power to fuel pumps. All safety switch must be securely mounted in rear of truck with two inch ring. Switch my also be activated in cab
C) Two 3/8 inch diameter bolts must be placed through the exhaust pipe in a cross pattern within one inch of each other and within 12 inches of turbo.
2. One production-available commercial truck engine ONLY will be permitted. Engines must have been
available over the highway road use trucks. The stock motor block or O.E.M. block that will operate with
the stock crankshaft for that model without any alterations for chassis mounting and in stock location for
that series of semi. NOTE: The legality of the Cummins QSK-19 has been approved since 1998 and is non-
contestable.
3. Turbos are limited to single O.E.M. style Turbocharger with a 4.1” inch maximum inducer bore on the
atmosphere turbo with O.E.M factory exhaust wheels. The bore will be measured using a 4.2” inch slug.
Map width enhancement of .180” maximum is permitted which must be in the O.E.M. location. No type of
non-O.E.M Housing permitted nor are design modifications to allow a larger wheel to be used in the turbo
housing. No Clipped or cut wheels. Exceptions: A factory 2005-2009 & 2011 CAT twin turbo engine is
permitted with the factory-installed non-altered turbos. A truck running an engine under 650 cubic inches
permitted to run twin turbos.
3. Transmissions and rear ends must be commercial semi-truck factory components.
4. Only mechanically activated clutches are permitted. (Hydraulic assists are permitted)
ELECTRONIC FUEL INJECTION SYSTEMS/FUEL INJECTION PUMPS
1. Electronic engine control (ECM) may be O.E.M. or aftermarket.
2. Factory fuel pump or P-Pump is allowed for all trucks. Must not be larger than a P7100. No pump may be
modified with Sigma parts. No Billet fuel pumps.
HITCHES
1. Trucks are required to have their own hitching device that is subject to approval by the head tech official
at each event. This hitch must work from the 5th wheel with the 5th wheel centered between the two
rear axles. The hitch must be adjustable so that the height from the ground to the point of hook is
between 18” and 14” + or – 1”. The hitch will be measured immediately before the semi hooks to the
sled. Hitch design will follow the standard Full Pull Productions Style Hitch.
2. Centerline of the rear axle to hook point on the semi hitch must be no greater than 7 feet.
3. Fifth Wheel Position- Kingpin/Fifth wheel plate position no further forward then the center of the front
axle and no further back then center between the two axles.
WEIGHTS or ADDED BALLAST
1. Maximum weight for any truck will be 20,000 pounds.
2. Weights cannot extend rearward more than 51 inches from the center of the rear axle. (Weights
included)
3. Weights cannot extend more than 24 inches from the farthest point forward of the vehicle.
4. Weights must not interfere with the hooking of the sled to the hitch.
5. No moveable weights are permitted during competition. (Such as hydraulic controlled weight racks or
boxes).
TIRES
1. All tires must be road use approved tires and available to the public. Dual wheels and dual tires must be
used on the rear axles. No chains or cables permitted. No cutting of tires is permitted. Maximum tire
size limited to; 11x24.5 x 8.25 (or) 10 x 22 x 8.25. Tread width of 10” per each drive tire.
2. No split rim or wedge lug type wheel allowed. No spoke type wheels. Wheels must be bud type.