Mini-Z Rookie 50% Rules
v1Summary of recent changes
Published from nimrc.club/classes.
Spec sheet
- Notes
- 50% throttle tier; four AAA (alkaline/NiMH/NiCd); 6T-9T pinion, stock gear diff; stock RTR radio; no traction compound/warmers; no tungsten/brass weight
- Motor type
- Stock / sealed
- Spec motor
- Kyosho MZ9P or MZ9E (from RTR)
- Spec tire
- Any 1/28 production; front max 8.5mm, rear max 11mm, dia 19-20mm, tire max 25.5mm
- Tire additive
- Banned
- Body
- Any molded hard-shell, max 180mm x 83mm; headlight covers required; no Lexan
- Chassis
- Kyosho MR03/MR04 RWD or Associated SR27 RWD, stock; wheelbase 90/94/98/102mm
1.Who it’s for
Entry class for brand-new 1/28 racers (50% throttle tier). Club members can provide loaner cars — ask a race director.
2.Chassis
Kyosho MR03S, MR03S2, MR03 RTR, MR04 RWD, or Associated SR27 (RWD only) — must remain stock. Wheelbase 90, 94, 98, or 102mm only.
3.Motor & ESC
Kyosho MZ9P or MZ9E from the RTR. Max 20-gauge wire; safety switch may be removed; no other modifications.
4.Gearing
6T–9T pinion. Stock Kyosho gear diff only.
5.Wheels & tires
Any 1/28 production wheels — front max 8.5mm wide, rear max 11mm, diameter 19–20mm. Tires max 25.5mm mounted diameter. NO traction compound, tire warmers, foam, silicone, urethane, or ethyl carbonate — clean with 70% alcohol or water only.
6.Batteries
Four AAA (alkaline, NiMH, or NiCd). One additional battery allowed for the transponder.
7.Electronics
Stock RTR radio only (NIMRC exception: aftermarket radios allowed). No modifications.
8.Body
Any molded hard-shell body fitting the allowed wheelbase — max 180mm long × 83mm wide. Original headlight covers required. Lexan prohibited.
9.Option parts
Bearings, wheel nuts, springs, and T-plates from any manufacturer; original Kyosho suspension parts only. No tungsten or brass weight additions. King-pin flip permitted if the lower pin is shortened to prevent track damage.