Well are you running foam or rubber? if you are running rubber then you are probably to high!! this is where roll outs are better. To work out rollout you multiply your tire diameter by pie (3.14) and divide this by your fdr. this will give you a roll out. so most rubber tyres are 64mm so you would be running a 42.7 mil rollout which would suit a very large track. if this is the case then drop 3 teeth off your pinion which will bring you just under 40mm and turn your timing back up to full and see how that goes!! if you want more info p.m me!!


Hello mate,

Yeah im running rubber tyres that are 64mm

Ive never had anything to do with rollouts before as i am relativly new to things , the outdoor track im going to be gearing for is medium sort of size , i want to use 48dp because here in england there tends to be alot of dirt etc on the track so i can avoid strippin the gears
So u recommend i go down 2-3t on the pinion ?