Avon 275/55-15 - Anybody have a shop tire?

[66gtk]

I'm calculating a very close/tight fit with these on my application. At the crazy expensive prices I don't want to be stuck with them if they don't fit (:

Does anybody have a worn out, damaged, whatever....Avon 275/55-15 I can use/borrow for fit testing purposes? Needs to hold air long enough to test fit.

Lastly, does anybody have a fresh set for sale or know where I can find them in MN?

Thanks!
Troy

[LUCKY-13]

You can find them on Roger Kraus Racing site.
On the left click on Race Tire Pricing, go down and click on the Goodyear tire file, then I think it's the top file that says "cobra tires", click on that and then it's like the third page. I just checked because I also want the widest front tire possible, yet keeping the diameter closest to 27 diameters as possible. As I'm sure your aware a 28 will not work on the fronts. Roger wants a bit over $400 per tire and the diameter i forget exactly but it's around 26.5 and yes that tire will work on the front. The only issue I see is that if your running a 7.5 front rim they recommend a min of an 8 inch. I know a lot of 275 tires out there say you can use a 7.5. I don't know what make you have but mine is a Superformance and mine is 7.5.
Just put Nitto 325/50-15 on the back and I love them!

[66gtk]

Thanks all. I've decided to make life easier on myself and will be going with a tire the local tire shop can provide. Choices are getting slimmer every time I need tires it seems.

Here is a test fit with 255/60r15 in the rear and 235/60r15 up front. My main concern is that I want to keep a 2.5" rear exiting exhaust as I'm not willing to compromise on that with my street car.

[ACHiPo]

You should be able to run 255/60 R15s on the front with no interference. I'd think those 9.5" wide FIA rear wheels would take 295s without interfering with the exhaust?

AC

[66gtk]

The 295's would clear if I was running the small ERA supplied exhaust (still very tight), but I'm not. I have a custom built 2.5" exhaust system all the way out the rear and also custom made headers with larger primary tubing (:

The table is very handy and shows what will fit without interference when considering overall tire height and rubbing.

289/FIA and 427 Tire Dimension Table

[DanEC]

Troy - I like those FIA wheels - great look. What backspace are they on the rear - I would like to compare to mine if I can find the info again? If I had it all to do over I would probably checked with Bob and Vintage to see if they could have machined my rear wheels for about 1/4 inch less backspace. But so far I haven't had any interference with my 2-1/2 inch tail pipes.

Dan

Originally Posted by 66gtk

Thanks all. I've decided to make life easier on myself and will be going with a tire the local tire shop can provide. Choices are getting slimmer every time I need tires it seems.

Here is a test fit with 255/60r15 in the rear and 235/60r15 up front. My main concern is that I want to keep a 2.5" rear exiting exhaust as I'm not willing to compromise on that with my street car.

[66gtk]

Dan,

One thing I've learned is that the BS measurement when comparing FIA style to Halibrand style wheels isn't the only info you need. The wheels are built differently and have a different offset.

Rear backspacing measurements are 3.535 and fronts are 3.891. These were not confirmed by myself, but were what I was told by the guy who sold them to me. Based on the 3.891 info I was anticipating needing to use a spacer, but after fitting them confirmed that I do not. Again, I believe these wheels have the mounting surface located differently than your 427 style wheels making backspace comparisons difficult apples to apples methodology.

[DanEC]

Troy - I'll see if I can find my wheel info. The backspace on the wheels should be comparable - just the distance from outside edge of rim to the inside hub surface. But the adaptor thickness could be different between the two wheels - assuming they are 5-pin with an adaptor. If they are 6-pin then they can't be easily compared to my 5-pins. Who sells those - Trigo, Vintage, ?

[66gtk]

Mine are 6 PIN

[DanEC]

OK - can't really compare then. But - good news that it works out and you have enough room for your exhaust.

Have a Happy New Year

Dan