Originally Posted by HB
why u want to use irs axial why not the stock?
if u want to use the prisma wheels u can put some shims on it 1/4
i like to use the M4 nuts
i don't like the plastic nuts from irs
A graphite axle like the one from IRS is about 12gr. lighter than the stock aluminum 3 piece axle from the C12. Your rotating mass will go down by doing this...
I am curious where you use the M4 nuts then, do you use them to space out the axle so you can use the Prism wheels? If so than I guess you will place 3 nuts on each side between the wheel and the hub. That will never run 100% true and also creates more work on the car when you change tires. If you did mean to put some 1/4" axle shims on the axle itself. That is not enough to compensate the 3mm offset of the Prism wheels and therefore the rear end will be narrower than it should be. I have owned a C12 and tried both of these things to compensate the offset of the Prisms and both of them didn't work...
I also don't like the plastic nuts from IRS and therefore I placed a Slapmaster Thrustbearing on the axle. It has a aluminum nut and makes the diff super!!!