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1/10-SCALE PRO-4 NITRO RACING RULES SPECIFICATIONS Minimum Maximum Wheelbase 12.59 in (320mm) 13.19 in (335mm) Overall Length 20.10 in (511mm) 22.36 in (568mm) Overall Width 10.75 in (273mm) 11.65 in (296mm) Weight 88 oz (2505 g) — Vehicle Overall Height 7.835 in (199mm) — Wheel Bead Inner Diameter — 3.0 in (76.20mm) Wheel Diameter Outer — 2.2 in (55.88mm) Tire Diameter Mounted 3.90 in (99mm) — 1. Tire & Wheel a. Rubber tires only. b. No tire tread cutting, slick tires or custom-made tires. c. Only short course tires specifically made for SCT. d. Wheel discs and beadlocks are optional. 2. Transmission a. Single speed only. b. Transmission drive: 4WD. 3. Suspension a. Independent. 4. Engine, Pipe a. Maximum engine size: .20 cubic inches or 3.4cc. b. Pipe: Must use a muffler/pipe. 5. Fuel a. Maximum 30% nitro methane. 6. Fuel Tank a. Maximum fuel tank size: 125cc. 7. Fueling a. Vehicle can be fueled as many times as needed in qualifiers or main events. b. In the spirit of keeping the class fun and simple, fuel guns are NOT allowed. ©2012 Horizon Hobby, Inc. Team Losi, TLR, TEN-SCT and the Horizon Hobby logo are trademarks or registered trademarks of Horizon Hobby, Inc. Live Fast…Play Dirty Motorsports, LLC., Lucas Oil Products, Inc., King, Eibach, General Tire, E3 Spark Plugs, K&N, Racin’ Dirty, MSD, KMC Wheels, Miller Motorsports Park, Impact Racing, Suspension Connection, Ironclad, Tuff Country, Mastercraft and Magnaflow are property of their respective owners and are used by permission or license by Horizon Hobby, Inc. 39040 8. Body a. Body design must resemble a full-size short course truck that completely covers tires when viewed from above. b. Body can have any trim scheme desired. c. Body must be painted or wrapped. No clear bodies allowed. d. No integrated rear wings or spoilers. e. Windshield and side windows can be removed for fueling and additional cooling. f. Air flow holes are legal, but a trim line must be present. 9. Race Length a. Heat races are five minutes or at race director’s discretion. b. Two or three qualifiers per racing event or at race director’s discretion. c. Main events: 15 minutes or at race director’s discretion. d. Bump-ups are allowed under race director’s discretion. e. Team Losi Racing suggests during the 15-minute A-Main event at the halfway point of the race (7:30 mark), all vehicles are brought back together in running order and the A-Main is then restarted. The lap counting computer will not restart at this point and will keep running. This will add excitement for the competitors and the spectators and emulate full-scale short course truck racing. RULES WWW.TLRACING.COM ®
