Sub Classes | ASC, Kart, Truck/Van, Muscle Car, Trailer Racing and Rocket League | | RWD, AWD, Stock, Superstock, F1 Cars Allowed
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Transmitter | Stock Transmitter | Any Transmitter | Any Transmitter | Any Transmitter | Any Transmitter |
Chassis | MR-03 98mm or 102mm. No modifications | See HFAY rules for complete list | Any Chassis | MR-03 98mm or 102mm, EVO (Stock with 4100kv), EVO (Upgrades with 3500kv), PNR2.5 Any lipo chassis (2500kv only) | MR-03 98mm, 102mm, or PNR2.5 (with Brushed Motor), Any lipo chassis (with Lipo Motor) |
Minimum Weight | N/A | 160g | No Minimum Weight | 160g | 160g |
Motor | 80T Motor. Can replace motor wires and clip thermal switch + capacitors | 80T, 70T, or up to 3500kv Brushless, Xspeed 4100kv (Stock EVO Only) | Any Motor | 80T, 70T, 3500 (AAA Only), 2500kv (Lipo/Any ESC), XSpeed 4100kv (Stock EVO Only) | 3500kv (Lipo), 5500kv (AAA), 50T (AAA) |
Electronics | Stock With No Mods | Stock. FETs Allowed | Any Electronics except HFAY Racer Combo in HFAY Open | Stock. FETs Allowed | Any Electronics |
Diff/Spur/Pinion | Kyosho Stock Diff. 6T, 7T, 8T or 9T Stock Pinion | Any Diff/Pinion | Any Diff/Pinion | Any Diff/Pinion | 53/10? |
Chassis Upgrades | Upgrade Bearings, Kingpin Flip, Springs, T-Plates, Motor Wires Allowed, | KNB + Upgraded Front Suspensions, aluminum parts | Any Chassis Upgrades | KNB + Upgraded Front Suspensions, aluminum parts | Any Chassis Upgrades |
Motor Mounts and Rear Suspension | Kyosho Plastic Motor Mount. No Disc Damper | Any Motor Mounts and Rear Suspension | Any Motor Mounts and Rear Suspension | Any Motor Mounts and Rear Suspension | Any Motor Mounts and Rear Suspension |
Bodies | ASC or White Hard Body Only. No Body Mods or Upgrades | ASC or White Hard Bodies. Front Splitter Mod Allowed. Lexan Window and Roofs Allowed. Aftermarket Rear Wing or Mod Allowed. See HFAY rules for complete list. | Any Body Including Lexan | ASC or White Hard Bodies. Front Splitter Mod Allowed. Lexan Window and Roofs Allowed. Aftermarket Rear Wing or Mod Allowed. | ASC or White Hard Bodies. Front Splitter Mod Allowed. Lexan Window and Roofs Allowed. Aftermarket Rear Wing or Mod Allowed. |
Batteries | 4AAA Batteries | 4AAA Batteries | Any Batteries. Lipos charged to 8.40v Max | 4AAA Batteries + Listed Motor Exceptions | 4 AAA (5500kv and 50T), 3500kv (Lipo) |
Tires/Wheels | Front 8.5mm, Rear 11mm. Rubber only. No sauce. Clean with 70% alcohol max. 14mm wheels/tires ok for kart, truck. | Rubber only. No sauce. Clean with 70% alcohol max. | Rubber only. No sauce. Clean with 70% alcohol max. | Front 8.5mm, Rear 11mm. Rubber only. No sauce. Clean with 70% alcohol max. | Front 8.5mm, Rear 11mm. Rubber only. No sauce. Clean with 70% alcohol max. |