Mini Stox

Ministox is one of the oldest classes but don’t be fooled into thinking they are the same as the old minis that you used to see years ago. Even though they may look the same under the skin things have improved a lot over the years and now these little cars can be really fast.

Minis run a short wheelbase grp chassis with no suspension at all making them extremely hard to drive at times. Contact is a given and making them easy to spin out making driving them for the experienced driver.

It’s all about tyres choice with minis – get it right and your unbeatable, get it wrong and its undrivable.

Lots of people try them and don’t get it right so give up and go back to saloons making numbers vary a lot and kits change hands frequently.

Mini Stock Construction Rules 2023

1) Body shells to be a representation of a full size Mini type car, body to be ABS or Lexan.

2) Chassis must be made from GRP (No carbon mix or special mix GRP) and have: –

Maximum length including bumpers to be 292mm.

Overall maximum width of the rolling chassis to be 163mm.

Wheel base to be 175mm +/-2mm.

Chassis to be single piece & constructed in GRP only, measuring no more than 230mm in length and 100mm in width.

No suspension whatsoever, including dampers, springs, shocks, “O” rings or notching the chassis. Any holes drilled or cut must be used or filled.

3) External plastic bumpers to be fitted front and rear, front to be grid and representative of a full-size mini stock car.

4) Metal materials used in the rolling chassis may only be steel, brass or aluminium. Special metals (such as titanium) are not allowed.

5) Rolling element (ball) bearings are allowed on the front and rear axles.

6) Min 25mm. Max 26mm width of tyres and Max 60mm diameter no min diameter of tyres, but the tyre must cover the wheel.

7) Standard slot drive rear wheels with the single wheel nut only. GT12/LMP style wheels are not allowed.

8) Diffs are not permitted.

9) Z drives and alloy pods are allowed.

10) Powered by either a 17.5t brushless motor and a 1s lipo battery, esc must be in BLINKY mode with a max £150 RRP, or a 4 cell brushed esc and either a Kamtec K21 Core 21 or Saturn 21 motor.

11) All lipo batteries are subject to a voltage test max of 4.2 volts, prior to any race at committees wishes anyone who fails the test will be not permitted to race that heat, and anybody who refuses to partake in a voltage test may also be removed from the heat/final

16) Single bolt rear axle only, gearing is open both 32dp and 48dp are allowed and z drive hubs are allowed.

17) Tyre additives are NOT allowed.

18) Parts from other manufacturers may be used as long as they serve the same purpose as the part they are replacing.

19) Minimum ride height of 3mm.

20) All added weight must be bolted to the chassis with a nut and bolt except under lipo weights. 

21) All cars must be commercially available to buy. Any one wishing to manufacture a car must go through the process of test and development at their regular club with the clubs agreement. If they wish to then race the car they must be able to make units available to purchase by other racers. It must comply to the current construction regulations if being sold to race. It must be of a comparable price to those being sold by other manufacturers and not overly priced to limit availability. Anyone wishing to develop or modify a car that does not comply with current construction regulations has to do that test and development at their local club with their agreement. Any changes to the construction rules that allow new designs to race would need to be approved at the BRCA AGM following the correct procedure.