The tire that came on the original motorcycles seemed to be cheap with terrible grip. Did anybody make a silicone pair? Is there anything that might work? Is there a simple way to cut down a regular pair of silicones and if so what size should I use?

Tom Heister used to sell a silicone tire for the 4 gear cars. You may be able to cut these down with a sharp exacto while spinning them on a rim. Not sure if he still has them or not. You may need to glue them as the tire will be quite narrow once cut down.

RRR sells a silicone tire for 4 gear cars.

I got a better solution. Wierd Jack sells tires for the Tyco S cars. Use the taller ones, they stretch right onto the cycle hubs and give excellent grip.

Thanks for the feedback.

No worries. I know how it is trying to figure out what someone else already knows.