I just recently chewed up the CB gears and was surfing Custom's website and noticed they offered a 17T, 21T and a 25T. Now I am assuming that stock is 21 and 25 on the CB but if the 17T is offered what would you run with that so that it would mesh correctly? Would you have to go 17/21, or can you go 17/25? Thanks.

Hey bash, the 17t and the 21t are the stock gears for the Genesis three speed. And 21t and 25t are stock for thge Nemesis.

You would only have to move the motor closer to the spur gear to mesh properly

I have 2 Clutch Bells for my rig
1 with the 17t and 21t and 1 with 21t and 25t for quicker gear changes

I want change gears even taller but I'm not sure were to find gears that will thread on the cen CB. To mesh properly you have to select gears that are 4t apart in sizes.

i run 17/21 with my .28 more lowend

Sounds good guys, thanks. So is the 21/25 too tall for the 3 speed or should I go down to the 17/21 once the 3 speed is installed?

Actually for bashing the 21t, 25t and 3 speed is very fast on the top end, but for racing its too much gear you will not usually see third at least not on a small track.

How about the Spur gears, are they the same from the Genesis and Nemesis?