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Old 06-12-2020, 10:16 AM
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GTO TEX GTO TEX is offline
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Join Date: Aug 2016
Location: Lubbock, Texas
Posts: 48
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Originally Posted by 69gtocv View Post
I just went through this with my 72, though I did 18's. Gto Tex's 66 looks awesome, but I think the tires are a tad short. I wanted to get mine so that they were close to factory diameter. If I were doing 17's, I think I'd do 245/50/17's in front and either 255/50/17's or 275/45/17's in back which are closer to stock height. I didn't think I could get 275's in the rear of mine, but it worked and looks great

Update... skip my suggestion on 275/45/17's, doesn't appear they make tires in that size! Definitely don't go smaller that 255's with those 9" wide wheels. My tire guy told me that the 275's I put on my 9.5" wide rear wheels was about as narrow as he would go
Problem with a 50 series tire is there is really no performance, speed rated sticky tires available. The 50's are about 1" taller than the 45's. The 45's are still 1" taller than the the tires the car was born with. I am running BMR arms and 1" drop Hotchkis springs.

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Mike Iden
'66 GTO Post/468, 700R4, 3.31 7.25@96mph 1/8
'21 Chevy 4X4 Crew RST Z71