I'm currently running the SMALLEST Spur Gear I can find.
I run the PRS 64 Pitch 76 tooth SPUR GEAR. This is to get a tall enough ROLLOUT for the class I run on a Bicycle VELODROME
That TINY spur was coupled with a 63 tooth PINION yesterday to run laps over 52 mph in our SLOWEST Brushless class. (Rollout 6.5 - RATIO 1.206:1)
When running HIGH RPM motorsk, we use Larger Spurs to get the ratio, when running LOW RPM motors, we use Smaller Spurs.
When I ran a 7x1 MOD motor last year with our 4 cell oval cars on a short track, I ran a 128/18 on short foam tires. (Rollout .97 - RATIO 7.111:1)
R/C Racing since 1985 ~ Santa Maria, CA (Central Coast)
2001-2012 - South-West Tour R/C Oval Series - R.I.P.
...will the SWT be revived? Time will tell, but we ARE returning to the VELODROME in 2016