First off im sorry - im sure if you search for "wheels" or "tires" my name will crop up a lot /forums/images/icons/laugh.gif
My current 14x6 wheels have P205 70R14 all round
My new ones are 15x7 - now the question: a stupid one it may be but less stupid than posting "i spent $400 on tires that dont fit" /forums/images/icons/tongue.gif
Is P20570R14 the same diameter/radius as P20560R15 ?
Its height of the tire thats the biggest issue with fit (i think!)
205 is width, the second number 60 or 70 is the profile of the tire (meaning the height of tire from rim to tread) so profile will tell you the overall diameter of the tire. Profile is a proportion of the width so a 235 50 tire is actually taller than a 205 50 tire.
The others are correct, as to sspect ratio, width, etc. The Tirerack.com tip is very beneficial, you can get tread width, section width and lots of useful info. The other thing I'll point out is that all tires are not created equal.....for example a BFG T/A radial in a 215/60R15 size will be a bit smaller in diameter than other brands of the same size. So once again, go to the tirerack specs page and comparison shop.....Your particular car would do much better with 225/60-15s, IMO.
To explain a bit more clearly - i need a tire thats total height is about an inch TALLER than P205-70-R14
The tire sizing i understand, but am still confused by the Aspect Ratio.
Working it out that way, P215 = 20.07" overall height, but i was under the impression that P215 would be taller than a P205 tire, and the way im understanding it now if the aspect ratio stays the same, but the section with increases the tire gets lower but fatter /forums/images/icons/crazy.gif
Case in point - choosing tires for my '68 coupe with 15x7 rims and 4 1/8 backspacing.
I'm in way over my head here! /forums/images/icons/laugh.gif
So the good news is, it will fit. The bad news is you have a smaller tire. It you can't exchange them, it's not that big a deal to be a little smaller. As long as you have the offset on the new wheel right, the only thing wrong will be that the speedometer will be off.
I reckon P225-60R15 on the rear will be fine - high enough, but low enough not to worry about the sidewall rubbing the fenders.
On the front, well - i would like to think P225-60R15 would work...... but i would be guessing, cause i mean those wheels turn, right? /forums/images/icons/laugh.gif
Thanks,
Gary
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My mistake, worked it out wrong - only added one sidewall
Actually I did read your post as if you had already paid for the tires. /forums/images/icons/blush.gif Most things seem to go that way for me... I buy something, then a week later I read something or learn something new and wish I'd done it slighlty different.
But being that you have not spent your money I would suggest a larger tire. On my Fastback I used the Vintage 45, 16x8. The tires are 245/50 and 225/50. Lowered one inch in the back and two inches in the front. Has a nice road race stance. Looks and works real good.
The trick is in the offset. I can't speak for the '68, but if you call the guys at Vintage Wheel Works they can tell you if it will fit. They were exactly right on mine, fit perfect, no problems at all. Vintage Wheel Works: 562) 906-8600
I'm pretty certain you can do it. I have 245/60-15s on 15x7 inch rims with 4.25" BS on my 65. I had to roll them, but they fit otherwise. You have much more space and flare than I do, so the 225s should fit with no problem, even with 1/8" less BS. 225s all around would be a nice balanced package. If in doubt, get the tire guys to mount you one up and try it on the front and back. Install on front/let lift down/bounce on it/turn wheel/repeat for back wheel. This should clear up any doubts....Hey, I would cram 275/60s on the back of my 65 if I could make them fit!
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