I was introduced to rocker cover racing by Reg Courteney who borrowed 2 from a friend from the Sporting Car Club.
They had plastic wheels with ball clearing centres.
At our meeting they were fast but didn't suit our track and bottomed out in the dip, axles were too far back.
My grandson and I decided to build our own racers, one with 120mm wheels and the other with 150mm max size.
The smaller wheels were cut from an old computer door using a large hole saw mounted in a press drill, the inner bearing hole was cut last.
Skateboard bearings were used, at first they were pressed in but the wheels dished so we changed them, leaving them loose and gluing them in with Araldite - not the 5 minute version. The large wheels were cut out of Lexon
with a jig saw then trued up on an 8" bench grinder with a jig mounted to it using the pilot hole for the bearing
as a centre before the bearing hole was cut.
For an axle we used threaded rod . As you can see the smaller wheels are easier to make but we didn't want 2 cars the same.
Alan Reddy used this plywood with bearings glued in and they were very successful - he is very hard to beat.
The wood and the plastic wheels are delicate and easy to break, so care has to be taken not to hit anything.
Once you have finished the cars you will then have the pleasure of trying to get them to run straight on the track.
Rob Green


What is it? — It’s a fun event for Young kids & Old kids — Anyone can enter — all you need is a rocker cover off an engine, some wheels and lots of imagination — have a go - and join the fun!!!

Consists of a launch incline 2.4 metres long with two lanes 450mm wide, then a level run of 6 metres with two lanes 900mm wide.

Races are heats of two cars each. The cars are launched with the fronts on the starting retainer. The first car to have its front cross the finish line is the winner. If neither car makes it to the finish line, the car going the furthest in its lane wins.
If the wheels of a car should touch the lane markers or cross over the lane marker the car shall be disqualified. The competing car immediately becomes the winner.
Winning cars will advance to the next round until all are eliminated except one car.
The judge’s decision is final and no correspondence will be entered into, the judge shall be provided with body guards and whisked away at the end of the race.

Cars shall be based on an actual rocker from an engine.
• The cars shall have no power source or steering
•  No moving weights allowed
•  All motive force is provided by gravity
•  The maximum weight allowed is 4.5kg
•  The maximum length allowed is 750mm
•  The maximum overall width allowed is 380mm
•  The maximum overall height allowed is 250mm
•  The maximum ground clearance allowed is 50mm
•  The car must have four wheels with a non-metallic surface contacting the track, each no
more than 150mm in diameter.
•  Nothing can extend beyond the front of the rocker cover
•  75% of the original rocker cover must remain.

Drivers, downforce wings, spoilers, air dams, racing stickers, car names etc are all permitted
providing they are inside the overall dimensions. (They probably won’t do any good, but we will all get a good laugh out of them.)

ROB GREEN has the "good oil" on buiding your racer for July
ind out m
ore at:- RockerCoverInfo 

Article ID: ROCE33

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