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houston1 · 08-26-2006, 01:18 PM

I am shopping as well.
My opinion is 305 is too wide for 8.5. The rim needs to be at least 9 or 9.5 for the 305.
I think the rubbing will depend on the offset. For 8.5 I believe the offset should be +18 to have stock clearance. For 9 inch wide it needs to be +12 offset. 6 offset is equivelant to 1/4 inch.

I am probably going with 285-50-20 on 20 x 8.5 wheels. It'll be an inch shorter in diameter but will look nice a wide from the rear view.

08-26-2006, 01:18 PM	#2 (permalink)
houston1 Registered User iTrader: (0) Join Date: Jul 2006 Posts: 14 Thanks: 0 Thanked 0 Times in 0 Posts	Re: Tire size for 20" rim? I am shopping as well. My opinion is 305 is too wide for 8.5. The rim needs to be at least 9 or 9.5 for the 305. I think the rubbing will depend on the offset. For 8.5 I believe the offset should be +18 to have stock clearance. For 9 inch wide it needs to be +12 offset. 6 offset is equivelant to 1/4 inch. I am probably going with 285-50-20 on 20 x 8.5 wheels. It'll be an inch shorter in diameter but will look nice a wide from the rear view.