View Full Version : What is the maximum rear tire diameter for IRS with no fender?
I've seen discussion on this, but haven't come across any definitive answers for the IRS.
Also, does anybody have any on the road examples?
Can't give you a definitive answer specific to the IRS configuration but I think it really depends on how big you want to go, the wheel back spacing, and how far you're willing to go.
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Above is a photo of my car that uses a solid rear axle. I can fit up to 31" diameter radials (radials don't grow) or 30" wrinkle wall M/T drag slicks under the bobbed rear fenders. If I really needed more, I could manage it. I mounted my body ~1" higher in the rear, use a parallel four-link that allows adjusting the rear ride height much more than the standard FFR suspension will support. If I had wanted the IRS and needed to run tall tires I'm sure I could make the modifications to run larger tires.
So, my take on all this is it just depends on what you want and how bad you want it.
Thanks. Probably looking at 20~22" wheels, with fairly low profile tires. From what I've read that seems fine with the 3 & 4 link setups. I think I saw pics of your rear suspension somewhere else, now I understand why! :]