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Thread: 15x11 wheels vs stock, offsets, & scrub radius

  1. #1
    Gluon
    Join Date
    Jun 2013
    Location
    DFW
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    46
    Country
    United States

    15x11 wheels vs stock, offsets, & scrub radius

    On my SRA, I am about to switch from the stock 225/50/15 rears mounted on 15x7s to 275/35/15s mounted on Keizer 15x11s (matching wheel dimensions specs of @cvjoint's 15x11 Keizers). That said, before I pull the trigger on my Keizer rear wheels order, wanted to get confirmation that I wasn't making a costly mistake from an offset/scrub radius perspective.

    It's my understanding that the stock 15x7 wheels are +36 offset, whereas cvjoint-spec Keizer 15x11s are 0 offset. When I plug that into an online calculator, i get this: https://www.wheel-size.com/calc/?whe...cl=30mm&sr=0mm

    "Scrub radius will be changed by 42 mm, this may affect the car's handling."

    Is this problematic? I would have to go to +42mm offset on the Keizers to have no change in scrub radius, but i'm not sure if that would cause the wheel to hit the suspension arms. I'd like to get some more comfort around what would work best before dropping the $$$ on a wheel order.

    The 15x11 949Racing 6ULs that I wanted to get are +20 offset which supposedly have been used on the SRA without issue, which results in a 22mm positive scrub radius change. Unfortunately, those wheels are on an indefinitely long backorder.
    Last edited by texevora; July 10, 2019 at 01:53 PM.

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