Originally Posted by pejota

Need some help finding spur gears for an HPI Pro 4

Looking to hit a 3.5-3.7 FDR for the series here in Florida and i see that PRS offers a 76 tooth/64 pitch spur. It seems to me though that the 6 holes towards the middle of the spur won't line up with 4 holes used to mount the spur.

Do i need that JRX-S adapter or should i look at the Hot Bodies spurs?

Thanks! As always, every one here is a huge help!