Originally Posted by
EAMotorsports
Smallest Spur made that I know of is a 72. PRS just released 72, 74 and 76 last week. They are very hard to get though as they sell out as soon as they come off the machines. To make anything smaller than a 72 PRS would have to go to a 10 hole diff ball gear instead of 12 line now.
PRS 72 Spur with 12 diff balls+Slapmaster diff Thrust Kit= smooth diff for ever!
EA
Can you throw a 60 tooth pinion on your motor along with the 72 tooth spur?