pinion help

[team n.o.m.a.d]

hi need advice on pinion size on my dex210 im running a 8.5 motor at broxtowe outdoor track thanx

[s22jgs]

Depends what spur. If stock 87 then Ure limited upto about 24.

[hotrodchris]

Im running a 7.5 and gearing 78/25 if that helps at all it is normally on a high grip astro track with a long straight but have also used it with no issues on shorter tracks!

[s22jgs]

I ran 24/78 and it had no top end with an 8.5. Now running 26/83 with level 5 boost and it's much better. Could really do with 83 spur though

[hotrodchris]

did you try going slightly bigger on the pinnion with the 78 spr gear?
RW Racing do an 83 tooth spur gear.

[s22jgs]

Sorry I meant 87 not 78. It needs a 78 lol

[s22jgs]

I'm running a cat sx spur