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Buying wheels need help with offset

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Old 11-21-14, 01:51 PM
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Buying wheels need help with offset

I'm trying to buy these wheels they offer them in 4x110 but only in a 15x7+10 and a 15x8 +0 offset.. Will 15x8 +0 work for the back I'm a noob at wheel sizes need help.. I just don't want my wheels sticking out I want them to be perfectly flushed but as much lip as possible

ROTA Kyusha (15 inch) Wheels | ROTA Wheels Australia

Thanks again guys btw mine a gsl 4x110 bolt pattern
Old 11-21-14, 05:28 PM
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4.5" to 4.75" but 4.5" backspace is commonly used so rear tires dont rub against the frame on hard turns. Dont know how to convert it to offset.
Old 11-21-14, 07:41 PM
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I think it's Offset = Backspace minus (1/2 wheel Width)

O=B-(W/2)

When offset is positive, backspace is larger than the distance from the tire mounting lip to the centerline of the wheel, which is 1/2 the spec width.

When negative, backspace is less than half the spec width.

Seems right, anyway. No guarantee as I'm going from recent experience only.

The factory waffle rim is a 13x5.5, +25mm offset.

My new 7x15's are +10mm offset. They poke some in the front & are just about flush with the outer rear fender line.
Old 11-23-14, 09:03 AM
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15x7 +10 is perfect for front and rear, it will give you about 1/2 inch of clearance under full suspension travel. 15x8 +0 may stick out a 1/2 inch or so... but with the proper suspension setup tuck nicely with the right tire and give adequate clearance under full suspension travel .
Old 11-24-14, 02:14 PM
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Well seems like I'll go with the 15x7 since I'm running a 235 Mickey Thompson in the rear thanks a lot guys
Old 11-24-14, 04:04 PM
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Good choice for the rear. Be careful with the front. I doubt any more than a 215 will fit without rubbing the springs. Im running 205-50-15 with 15x7 +10 Panasports and i have maybe 10mm before it rubs my coilover springs.
Old 11-24-14, 05:56 PM
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In the video, that yellow car's performance can back up those rims. If you likve in Elgin Il, how can you get rims from australia.

"all bun and no burger" , "the sound and the fury", "all hat and no cattle", "all sizzle and no steak"' "spinning rims, and rear wings, count me in"
Old 12-13-14, 11:01 PM
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Awesome thread guys, thanks for the info!
Old 12-22-14, 04:16 AM
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So what offset did you decide to go with? Im in the same boat now, trying to decide which wheels and tires to buy.
Old 12-23-14, 07:34 AM
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Originally Posted by NCross
Good choice for the rear. Be careful with the front. I doubt any more than a 215 will fit without rubbing the springs. Im running 205-50-15 with 15x7 +10 Panasports and i have maybe 10mm before it rubs my coilover springs.
I have pretty much exactly these specs, only with Compomotives. 15x7 ET+10 but my tyre size is 205/55-15 all round. My tyre-to-spring clearance is fine (RB springs) and the rear fit no issues, but on the front we had to roll the arch lip and also pull the wing (fender?) out quite a bit for clearance on the tyre. But then, my tyres have a slightly higher sidewall than NCross'

Also (and these are words I never thought I'd say) but those Rotas in the OP are lush
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