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15x10 with 3.5 backspace fit with disk brake conversion?

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G3GM :: G3 Tech :: Wheel / Tire fitments

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15x10 with 3.5 backspace fit with disk brake conversion? Empty 15x10 with 3.5 backspace fit with disk brake conversion?

Post by zot Sun Feb 04, 2018 10:49 pm

I would love to put 15x10s at the rear but I'm converting to rear disk brakes and since most vintage wheels only had 3.5 backspace would they fit under the rear fenders at stock spring height or with a lowering spring ?
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Post by Limey SE Mon Feb 05, 2018 12:18 am

what wheels you talking most makers will make the back spacing you need but will need to be at the very least 4.5" and if with lowering I would say 5" to 5.5" bs

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Post by zot Mon Feb 05, 2018 7:56 am

US Mags Indy U101 15x10 5-oval slot wheels. I have a vintage set of Western 15x8.5 5-holes but one has a small crack and the chances of finding someone local to repair it is very low so If I can't locate a replacement and have to buy new I'm contemplating a larger width on the rear. The U101 15x9s have a 4.5 backspace so I'll take a look at those.  Thanks for the input! :-)

15x10 with 3.5 backspace fit with disk brake conversion? Ru1xK
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Post by impalamonte Mon Feb 05, 2018 9:34 am

You may want to do more research , but I think your fitment issues will mostly relate to your disc brake conversion.
I am not so sure that the caliper is going to fit with that diameter of rim (15"). (17" rim is probably going to be the next step) .
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Post by thatfnthing Mon Feb 05, 2018 10:21 am

impalamonte wrote:You may want to do more research , but I think your fitment issues will mostly relate to your disc brake conversion.
I am not so sure that the caliper is going to fit with that diameter of rim (15"). (17" rim is probably going to be the next step) .

X2. Most disc brake conversions will not fit inside a 15" wheel.
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Post by zot Mon Feb 05, 2018 3:16 pm

Good to know. I'll check that once I get them installed and reexamine the issue. Thanks!
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Post by alowerlevel Mon Feb 05, 2018 10:29 pm

Depends on the size of the rotor. A 11" rotor will fit in a 15" wheel.

Also you may want to go with the 9" wheel with 5" backspace, the 4.5" backspace wheel will be really close to the outer fender lip with a 275/60 tire.
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