GM B-Body Forum, 77-79 Caprice/Impala Forum

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GM B-Body Forum, 77-79 Caprice/Impala Forum

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GM B-Body Forum, 77-79 Caprice/Impala Forum

A forum for the owners and enthusiasts of General Motors B-Bodies from 1977-1990, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!


2 posters

    original 15x6 to 15x8 ?

    alusil850
    alusil850
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    original 15x6 to 15x8 ? Empty original 15x6 to 15x8 ?

    Post  alusil850 Thu Feb 22, 2018 2:27 pm

    hello,
    I will widening stock wheel,so same inside clearance but less ext clearance, somebody allready try 15x8 without contact with the fenders?
    or 15x10?
    also with what size of tire?

    I will modify stock for keeping dog dish, size like the gmbbodyforum.com capriceon top of this page look fine.
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    original 15x6 to 15x8 ? Empty Re: original 15x6 to 15x8 ?

    Post  GM B-Body Forum Fri Mar 02, 2018 2:47 pm

    15x10 fit no problem on the rears with a near 0 mm offset or about a 5.5in backspacing. Thanks, the photo is my caprice, but it has 15x7 all the way around currently. I think 15x8 should be standard for these cars and they fit perfectly also with a 0 mm offset, or 4.5in backspacing.

    alusil850
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    original 15x6 to 15x8 ? Empty Re: original 15x6 to 15x8 ?

    Post  alusil850 Fri Mar 02, 2018 3:46 pm

    ok, on the banner your car have 15x7, but they look wide because they have biggest offset.
    I have stock 15x7 and they are really more inside the fenders.
    I found also stock 15x6 from a diesel caprice, I will cut them and add 3" at the exterior rim.
    I think I will be correct with 15x9 on 4 wheels, with 245/60R15 (or 255/70R15) on rear and 235/70R15 on front,sand blasted and glossy black, white letters tires and chrome dog dish.
    I hope they will have enough clearance.

    also I have a stock ring and pignon for gm 10 bolts taken from a blazer k5, 3.5x/1, will it be better than the stock 2.5x/1 and will be street driveable behind a th350c ?
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    original 15x6 to 15x8 ? Empty Re: original 15x6 to 15x8 ?

    Post  GM B-Body Forum Fri Mar 02, 2018 3:53 pm

    My wheels have a 0mm offset or 4inch backspace, the tires are 235/70R15 all the way around 28inches tall. Now as far as the ring and pinion goes, I have a 3.90 gear ratio with a th350 it rpms high, I had a 3.08 and the original 2.41 and I'd say the 3.08 was better for everyday driving

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    alusil850
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    original 15x6 to 15x8 ? Empty Re: original 15x6 to 15x8 ?

    Post  alusil850 Fri Mar 02, 2018 3:57 pm

    thanks!
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    original 15x6 to 15x8 ? Empty Re: original 15x6 to 15x8 ?

    Post  GM B-Body Forum Fri Mar 02, 2018 4:00 pm

    No problem!!

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    alusil850
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    original 15x6 to 15x8 ? Empty Re: original 15x6 to 15x8 ?

    Post  alusil850 Sun Mar 11, 2018 12:28 pm

    so I widening the wheels, cutting the 15x6, and welding ring, becoming 15x9.5 for rear and 15x8.5 for front, I choose 255/70R15 for rear and 245/60R15 for front.
    I think nothing will not touch fenders.
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    original 15x6 to 15x8 ? Empty Re: original 15x6 to 15x8 ?

    Post  GM B-Body Forum Sat Mar 17, 2018 10:52 pm

    Nope they shouldnt touch at all!

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    original 15x6 to 15x8 ? Empty Re: original 15x6 to 15x8 ?

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