Speedworld Raceway & Hobbies


USGT rules

web-site – www.usvintagetransam.com


USGT Class Rules and Specifications

Note: JANUARY 1 2014 The Ride spec tire will become the official spec tire for USGT
RIE24025 – set of 4 available through Gravity RC http://www.teamgravityrc.com/ to dealers and retail 

Chassis Specification:
Any 1/10 4wd or Fwd sedan with 4 wheel independent suspension.

Weight Specification:
4wd 1450g weight Fwd 1200g weight

Body Specifications:
Any 190mm or 200mm body. Body can be any body that is NOT on the ROAR T2 body list. FWD encouraged to use FWD bodies However, Can AM or IMSA style bodies, similar to 1/12 or 1/8 bodies are also discouraged NO Trucks
Any “SCALE” molded wings can be used. Lexan wings 10mm maximum height / side dam height
Scale type race liveries encouraged

Tire & Wheel Specifications:
Tires– RIE24025 – set of 4 available through Gravity RC http://www.teamgravityrc.com/ to dealers and retail
Grinding of tire tread is NOT permitted. Sanding of mold seam to remove seam is allowed
Wheels– Any 24 or 26mm spoke (non-dish) type wheel

Ride Height Specification:
Minimum ride height is 5mm.


Motor Specifications:
ROAR approved 21.5 + 2s lipo batteries No tuning rotors, must use OEM rotor 12.3-12.5mm

Approved ESCs: 
ESC ROAR approved spec software or USVTA list

Race Specification:
6 minute qualifiers
8 minute mains

Battery Specifications:
ROAR approved hard case batteries



Min ride height 3mm

Max width 205mm

Min wheelbase 255mm

Max wheelbase 275mm

Min weight 1200g

Motor limit indoor tracks 21.5, outdoor tracks 17.5

Esc ROAR approved blinky only

Battery 2S regular or shorty

Single nut wheel attachment

Rubber tires 

Max wheel width front TBA

Max wheel width rear TBA

Min wheel width front TBA

Min wheel width rear TBA

Max wheel diameter 50mm

Max tire diameter TBA

Min tire diameter TBA

Only LMP, Group C, GTP, GT1, Can Am, Sports Prototype bodies are allowed 

– If body comes with molded in kick up at rear, must be cut out to resemble separate wing as on full scale car 

– If body come with separate wing, must be mounted in same location as full scale car

– No oval or TC style wings allowed

– Scale liveries encouraged and recommended, we will make fun of you if you paint a tribal flamejob-no exceptions

Qualifying format to be USSRCRA style, 3 min single qualifier using 5 fastest avg laps to seed your position for mains.

3 x 10 min mains for points to determine overall winner

– Option to use standard IFMAR qualifying and single main event (club choice)

Commercially available LMP chassis (SpeedPassion LM-1) or converted 1/10 pan chassis (WGT, Pro-10) pan chassis fitting the dimensions are allowed. 

Body recommendations- 

SpeedPassion LMA
Royce RM-1
Toyota GT-1 TS020
Rivall LMP1 
Porsche 962
Nissan R91CP
Toyota Group C 88CV
Mercedes Group C CLR
Porsche 962C
Toyota GT1 TS020

Porsche 911 GT1