Tire size advice please - Team Camaro Tech
Wheels & Tires What fits what?

 
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post #1 of 7 (permalink) Old Jul 6th, 17, 05:26 PM Thread Starter
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Michael Lockwoo
 
Join Date: Sep 2015
Location: SF Bay Area
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Tire size advice please

Hey all,

I'm building up a protouring '69 and am just about to pull the trigger on tires. The car is not tubbed. I'm going with 17" wheels. 17 x 8 in front and 17 x 9.5 in the back. Not sure of the backspacing just yet but Forgeline will take care of it when I order the wheels and give them my brake, rotor and clearance specs. It looks like it will be 235/45/17 in the front. For the rears, I am thinking 255/45/17.

Right now, I have 11.75" between the inner side of the top of the fender opening and the inner wheel well (rear). This is 298.45 mm. 298.45 - 255 = 43.45 mm = 1.7 inches / 2 = just over 3/4 inch clearance on both sides of the tires if centered. Does this sound reasonable to you? I see many of you are running 255s. it may be an unnecessary post but i wanted to make sure this sounds right before spending the cash. Thanks for any input!
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post #2 of 7 (permalink) Old Jul 6th, 17, 06:57 PM
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Simon
 
Join Date: Jul 2009
Location: Toronto, Canada
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Re: Tire size advice please

Michael, I would recommend 18" rims cause you have a greater selection of performance tires and depending what brakes you select there might be a little more clearance if needed.
Another thing is to have all your suspension in place, could be a rather expensive with Forgeline products if a mistake measuring happens.
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post #3 of 7 (permalink) Old Jul 6th, 17, 08:35 PM Thread Starter
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Michael Lockwoo
 
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Re: Tire size advice please

Thanks for the advice. I do have all suspension in place. The brakes and rotors are in place too. I have waited to order the wheels until I had suspension and brakes in place. I will end up changing out the differential and, possibly the axles but I think I can do this without changing where the wheels end up sitting.

A couple others have recommended 18" rims. Personally, I think 18's are a little too big. The brakes that I put on there are the Wilwood 12.88's. They say these are designed for 17'inch wheels (and larger). I've been told that when Forgeline builds the wheels, they use the spec sheet from the brakes to ensure clearance.

Right now, I'm leaning towards going for the 255's. So many people on here are running them that I can't imagine there will be problems. If there's rubbing, there won't be much. Nothing a little angle grinder can't take care of. Any opinions?
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post #4 of 7 (permalink) Old Jul 7th, 17, 04:34 AM
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Bruce
 
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Re: Tire size advice please

Mike, I am running 235/45/17 and 255/45/17 on 8" wheels all around and I am really satisfied and get a lot of compliments. The 69 is lowered 2" and I have no rubbing issues. The height is close to the 60 series on 15x8 Vett rallys that were on the car. I have BFG tires, and it gives me a nice sidewall look instead of the rubber ban look. I will say by lowering and the 17's, the ride is not as good as stock. I won't be drinking a coffee while driving, but it looks good!!!
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post #5 of 7 (permalink) Old Jul 7th, 17, 04:37 AM
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Bruce
 
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Re: Tire size advice please

Mike, I am running 235/45/17 and 245/45/17 on 8" wheels all around and I am really satisfied and get a lot of compliments. The 69 is lowered 2" and I have no rubbing issues. The height is close to the 60 series on 15x8 Vett rallys that were on the car. I have BFG tires, and it gives me a nice sidewall look instead of the rubber ban look. I will say by lowering and the 17's, the ride is not as good as stock. I won't be drinking a coffee while driving, but it looks good!!!
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post #6 of 7 (permalink) Old Jul 7th, 17, 04:39 AM
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Bruce
 
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Re: Tire size advice please

My mistake 245/45/17 on the rear
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post #7 of 7 (permalink) Old Jul 8th, 17, 05:31 AM
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Chris
 
Join Date: Oct 2013
Location: Texas
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Re: Tire size advice please

My 17" tire sizes are listed below in my signature line. Front wheels are 8" wide, rears are 9". I had to use spacers on the rear to avoid rubbing inside, but now they fit fine. This could have been avoided had I bought wheels with a different offset. I have a lot of room in the front and probably could have gone a size wider.

'69 Z/28, Lemans Blue/White Stripes, DZ302, Tremec Magnum, 4.10, Procar Elite Seats,
Custom Upholstery, Dynatech headers, 17" VWW V45's, 235/45, 275/40, C5 Front Brakes
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