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The URC official J-SPEC fleet

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Introducing: J-SPEC

J-SPEC is an electric off-road R/C racing class that combines low cost and high durability with a refreshing touch of realism to bring back a level of good, clean fun that the hobby has not seen in years.

J-SPEC racing vehicles are designed to mimic the form and function of the increasingly popular rally cars that compete in such high-profile venues as the World Rally Championship. J-SPEC cars run on existing offroad tracks with great pleasure and can easily be built for under $300, ready to run including radio, motor, electronic speed control (ESC), charger, and four battery packs!

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Specifications

Chassis: Any 2WD 1/10th scale electric stadium truck.
Recommended: Inexpensive Traxxas Rustler or Stampede RTR (under $150 new, assembled, with radio!), Duratrax Evader, or old model such as Losi JRXT or Associated RC10T.
Body: Any 280mm-300mm wheelbase, 215mm+ width street car design. Must be recognizable as a street-driven passenger car, not a truck, buggy, or special racing design. Rally car appearance encouraged. HPI Super Nitro Lancer Evolution VI WRC and HPI Super Nitro Subaru Impreza WRC 300mm bodies are excellent choices.
Motor: Traxxas "Stinger" 20-turn factory-sealed can motor (included w/ Rustler, Stampede & Bandit RTR sets). No tampering permitted.
Tires: Similar tread patterns for front & rear pairs strongly encouraged for realism. Ribbed front tires (other than than the original set that came with your truck) not allowed.
Wheels: 2.2" diameter standard 1/10th scale stadium truck wheels.
Battery: Unmatched, factory sealed 1500mah sport pack in "shotgun" configuration (two rows of 3 cells each). (For example, DuraTrax Pirhanna, Trinity Amp Max, Dynamite Dyna-Sport, etc.)
Speed
controller:
Any MSC or ESC is allowed. Use of reverse not allowed during race.
Recommended: Duratrax Spike or other ESC retailing for under $50.
Gearing: No limit.
Other: Wide front bumper strongly encouraged for the sake of durability (for Traxxas-based J-Spec vehicles, use RPM wide bumper.)