Left Coast

OK, so I'm looking at an '87 and it has 17" aftermarket wheels with spacers. What effect does going to a larger rim size have on:
- stock suspension set up
- odometer calibration
- other stuff

Thanks!

Ed Hughes

Odo depends on tire diameter. The rim size has nothing to do with OD. Larger rim sizes usually get lower profile tires. The ride will be a little harsher. 17" typically gives a bit wider choice in rubber. Wheel bearings take more punishment with spacers.

Spacers suck, the wheels were not made for the 911 offset if they are required. This can be remedied, although you may spend a few $ for proper wheels.

MUSSBERGER

Knock two grand off for no Fuchs.

ricster

I say FUCH it. And forget bigger bling bling wheels

GT9111

Keep FUCH-in it.

ivangene

use this tool

LINK

to culculate the spedo change (see results on the bottom of page after inputting your #'s)
Then Fuch it!

Left Coast

Guys- again, thanks for the help & especially, Ivangene for the link! I'm really looking for a well maintained, low mile, stock car so yeah, deducting for non-stock items like wheels will be a given.

If I'm understanding it right, assuming the O/A dia of the wheel is larger than stock not only would it affect the speed reading wouldn't it also affect the odometer? Wouldn't odo show fewer miles than actually driven with larger wheels?

Ed Hughes

LC: Look at post #2. The diameter of the wheel is not what determines revolutions per mile. It is OD of the tire. That is what Ed's caluclator will show.