Not much choices in 15" tires - Team Camaro Tech
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post #1 of 20 (permalink) Old Mar 2nd, 10, 10:53 AM Thread Starter
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Not much choices in 15" tires

Hi all,

I'm trying to find wider rear tires for my 69 Z. I got 245/60/15s on 7" rallys on the back now but have questions. I cannot find a larger 50 series tire in 15" anymore other than drag radials. I prefer a tire less than 27" tall. So from reading about sectional tire widths from tireracks info page (sectional width increases about .2 for every 1/2" increase of rim width), do you think running the 245s on a 8" rally be a noticable difference?

thanks


Kelvin
1969 RS Z/28
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post #2 of 20 (permalink) Old Mar 2nd, 10, 12:03 PM
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Re: Not much choices in 15" tires

Tire Rack sells the BFG Radial T/A in 295/50 15, 26.7 inches dia on a 9.5 inch rim.

What are you trying to do? I have the 245 60 15 on an 8 inch rim on the back of my 69.

Eric
69 'vert project big block/TKO 600 RR
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post #3 of 20 (permalink) Old Mar 2nd, 10, 12:39 PM Thread Starter
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Re: Not much choices in 15" tires

Thanks Eric. 295s is too big for me. I would love to see a pic of your 245s on the 8" rim. I'm just trying to fill out the rear wheel wells a little more.

Kelvin
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post #4 of 20 (permalink) Old Mar 2nd, 10, 12:45 PM
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Re: Not much choices in 15" tires

245/60/15 is 9.6 wide and 26.5" tall.(sizes may vary some Mfg. to Mfg.)

245 is the width
60 is the aspect (side wall height)

A 245/50/15 would be 9.5-10" wide and 24.6" tall.(approximately)

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #5 of 20 (permalink) Old Mar 2nd, 10, 01:04 PM Thread Starter
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Re: Not much choices in 15" tires

Sorry, I wasn't clearer. As far as the 245s, I will stay with the 60 series (I like the tires to be around 26ish" tall), but to get anything wider (255,265,275s) I wanted to run 50/55 series so the tire will not get too tall. Is there such a thing as a 55 series tire?

Kelvin
1969 RS Z/28

Last edited by KELVINATOR; Mar 2nd, 10 at 01:30 PM.
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post #6 of 20 (permalink) Old Mar 2nd, 10, 01:28 PM Thread Starter
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Re: Not much choices in 15" tires

Using a tire calculator, a 255/55/15 would be the ideal tire spec for me but unfortunately that tire does not exist. So I'm wondering, if using a 1" wider rim (8" versus 7") will make the 245/60/15 tire "appear" a little wider.

Kelvin
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post #7 of 20 (permalink) Old Mar 3rd, 10, 07:24 AM
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Re: Not much choices in 15" tires

You think finding 15's are tough, try searching for a quality 14" radial these days!
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post #8 of 20 (permalink) Old Mar 3rd, 10, 01:08 PM
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Re: Not much choices in 15" tires

Kelvin I have 255/60/15 on the back of my 69 its a little wide for a 7" but its more popular than 245/60/15 is.

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post #9 of 20 (permalink) Old Mar 3rd, 10, 01:09 PM
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Re: Not much choices in 15" tires

Yes, they will look a little (very little?) wider as the sidewall bulge will be more flat...but it's just an allusion.

See if anyone else has that size on an 8" wheel and look at their pics ?

68 Camaro~LSx ~all motor
1.54 60'--6.95 @ 98.45 660'--10.96 @ 121.53
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post #10 of 20 (permalink) Old Mar 5th, 10, 12:40 AM Thread Starter
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Re: Not much choices in 15" tires

Would a 275/50/15 on a custom 8" rally (4.75 backspacing) fit on the rear of a 69 with no trimming and rubbing? I know guys run 17s and 18s with 275s but how about 15s? I'm concerned about the sidewall bulge. Found a 275 nitto drag radial that has a decent wear rating. A pic would be awesome!

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post #11 of 20 (permalink) Old Mar 5th, 10, 04:58 AM
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Re: Not much choices in 15" tires

Here are some pics of mine with the 245 60 15 on 8 inch wide Foose Nitrous:







I don't have any shots of this combo closeup or from behind, but if you want to see them I'll take some and post them up.

Eric
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post #12 of 20 (permalink) Old Mar 5th, 10, 07:36 AM Thread Starter
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Re: Not much choices in 15" tires

Thanks Eric, good looking combo!

Kelvin
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post #13 of 20 (permalink) Old Mar 5th, 10, 07:47 AM
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Re: Not much choices in 15" tires

Kelvin,
I have the 275/50/15 BFG radial ta on a 8" ralley with 4.5" back spacing. I had to roll the quarter lip, rear of car is up approx 1.5" gap between the tire and the wheel opening when viewed from the side, have approx 7/8" between the sidewall of the tire and the inner wheel tub. I have had a little bit of rubbing on both the inside and outside of the tire but have never damaged the tire. If you don't roll the quarter lip it may cut the tire. The sidewall bulge is too much for my liking, I wish I would have put the 255/60/15 which has an OD of 27".
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post #14 of 20 (permalink) Old Mar 5th, 10, 07:57 AM
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Re: Not much choices in 15" tires

Kelvin,
I forgot to mention this is on a 1969 for reference.
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post #15 of 20 (permalink) Old Mar 5th, 10, 09:23 AM Thread Starter
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Re: Not much choices in 15" tires

Thanks Mike, that is the info I was looking for!

Kelvin
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