storytyme

iTrader: (20)

I have a 72 spur and I need to find the largest pinion that would fit into a TC4. I tried a 39T and it didn't fit. Instead of buying a whole bunch and trying them, I thought someone could help me out. These are 48P. Thanks.

20 SMOKE

iTrader: (103)

you may have to go to 64p to get the ratio you are trying to get with 48p

storytyme

iTrader: (20)

I want to stay with 48p to cut down on cost.

CL

iTrader: (34)

Go to a smaller spur. Robinson Racing makes a 60T spur.

phildoggg

iTrader: (24)

I think 31t or 32t is about the biggest you can go with 72t spur. like said above grab a 60t rrp spur gear. part number rrp1860, tower has them. no you will not be able to run smaller than 29-30t pinion with the 60t spur. hope this helps.
phil

Tire Chunker

iTrader: (16)

A little heavy, but should work.