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Old Apr 2, 2014 | 07:46 PM
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Default Need some opinions here

Hey guys, so I bought a used rear and its narrowed 1.75" per side. He sold me 5" BS wheels really cheap so I just took them, and obviously they do not fit.

So here's my line of thinking, correct me if any of my figures are wrong, but a stock F-body uses 7.5" BS wheels, so with the 1.75" narrowing that means I would need a 5.75" BS wheel.

1) I really want Weld RTS wheels 15x10 so I'm going to have to get them custom made anyway. Using 275 Nitto 555R tires and measuring how far my current wheels sticks out of the quarter, using a 5.75" BS wheel would mean that the bulge of the tire would stick out 1/16" out of the fender. After having the fenders rolled, I do not think it would be an issue, and the wheels will be located where they should be.

2) Same Wheels and tires, but instead of getting a 5.75" BS I order them with a 6" BS, this would tuck the tire under the fender by 3/16" My thought process on this one is eventually id like to do mini tubs and run a 325 that is like 28" tall. So having the tire tucked in further would be more beneficial in this situation.

The bump stops are gone and I have plenty of room to expand inward, by maybe 1.5" before any more BFH'ing is needed.

Just wanted to hear your thoughts and opinions on what I should do, side note, anybody needs Weld Draglites 15x10 with 5" BS im selling mine.

Thanks Guys.
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Old Apr 3, 2014 | 06:47 AM
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Just for reference, the OE 16x8 wheels that my Z-28 came with, had 6" of backspacing.....
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Old Apr 4, 2014 | 12:23 AM
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The 5.75"BS should work really good up to a 295mm(11.6") width tire.
If you want to go with a 6"BS then do it, it sounds like going inward another 1/4" won't hurt you clearance since you've done a bunch of clearancing already.

BTW leadfoot4 , The factory 16 x 8 +55 offset wheel have about 6.6" of B.S..
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Old Apr 4, 2014 | 06:43 AM
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Originally Posted by 99Bluz28
.....BTW leadfoot4 , The factory 16 x 8 +55 offset wheel have about 6.6" of B.S..
"Blu", are you sure about that? Many years ago, right after I bought my Z-28, I had a set of the early CCWs, back when they were still using the cast aluminum centers that looked like the BBS cross-lace wheels. They were 16x9.5", and in discussing the backspacing with John Purner, CCW's owner, he said that when he made up my wheels, he simply "split the difference" of the added 1.5" of rim width over the OE wheels, and added 3/4" to the front side and 3/4" to the back side.

My CCWs had 6.75" of backspacing, as measured by myself. I thought that I had also measured the backspacing of the OE wheels, before I bought the CCWs, and thought it was 6", but it's been about 16-17 years since I took that measurement......
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Old Apr 4, 2014 | 09:24 AM
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We're lacking a key part of information here. Backspacing/offsets mean nothing without knowing the total width.

How wide were the wheels he sold you?
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Old Apr 4, 2014 | 03:13 PM
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Originally Posted by leadfoot4
"Blu", are you sure about that? Many years ago, right after I bought my Z-28, I had a set of the early CCWs, back when they were still using the cast aluminum centers that looked like the BBS cross-lace wheels. They were 16x9.5", and in discussing the backspacing with John Purner, CCW's owner, he said that when he made up my wheels, he simply "split the difference" of the added 1.5" of rim width over the OE wheels, and added 3/4" to the front side and 3/4" to the back side.

My CCWs had 6.75" of backspacing, as measured by myself. I thought that I had also measured the backspacing of the OE wheels, before I bought the CCWs, and thought it was 6", but it's been about 16-17 years since I took that measurement......
I just measured the B.S. on one of my factory 16 x 8s to be 110% sure, and it looks like 6.7" to me (just a hair under 6.75").
.
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Old Apr 6, 2014 | 07:47 AM
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Originally Posted by 99Bluz28
I just measured the B.S. on one of my factory 16 x 8s to be 110% sure, and it looks like 6.7" to me (just a hair under 6.75").
.
Guess my memory isn't as good as it used to be....
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Old Apr 6, 2014 | 12:42 PM
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The wheels he sold me were 15x10 just like the wheels I want.
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Old Apr 8, 2014 | 08:04 PM
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So apparently Weld does not make the RTS in a 6" BS so its either I get the 5.5" BS and deal with the tire sticking out of the wheel well, or I choose a different drag wheel, that does come with a 6" BS.
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