15" conversion while retaining base fenders?
Advanced
Joined: Feb 2017
Posts: 78
Likes: 4
From: Carroll oh
Safety Car
Joined: May 2011
Posts: 3,807
Likes: 508
From: Oshawa, Ontario
if you raise it on the jack bolts a reasonably fitting wheel with 27" tire should not touch.what condition are your rear shocks in?you cant have it both ways.lowered car and tall tires
Last edited by irok; Oct 28, 2017 at 11:36 AM.
Heel & Toe
Joined: Sep 2017
Posts: 17
Likes: 0
I have the 275/60/15 on my base car with zero rubbing issues, i would deff check your stock bolts to see if they ha e been lowered
Heel & Toe
Joined: Sep 2017
Posts: 17
Likes: 0
Instructor
Joined: Dec 2014
Posts: 110
Likes: 14
From: Crosby TX
I've been running the 15" Conversion on a base car until last week. I just swapped to the wide body fenders so I could run a larger tire. I ran 275/50/15 M/T drag radials for 2 yrs with no issues. The tire stuck past maybe 3/8 on an inch with 15x10 Weld RT on a 7.5 BS. Traction was good & consistent at the track, even on the jug. I got to the point I needed the taller tire because 138-140 mph with 3.42 gears you're done unless you're gonna spin the mtr to 7200 rpm +. I'll see if I can find some pics to post later today.
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Intermediate
Joined: Mar 2008
Posts: 45
Likes: 9
This is me using the search 
Weld makes a 9.275 inch wide rim with 7.5 bs.. would that help tuck a tire on the base fenders.. Is 7.5 the most BS you can run before running into suspension interference..
Asking because I already ordered the needed spindles . Going to change out the base breaks .. Have a 3.42 gear to install in my a6 car but I dont have the power to need a 28" tire (yet) but completely destroy the 17" radial anywhere but the track with the 3800 stall..
Thanks Ben
Weld makes a 9.275 inch wide rim with 7.5 bs.. would that help tuck a tire on the base fenders.. Is 7.5 the most BS you can run before running into suspension interference..
Asking because I already ordered the needed spindles . Going to change out the base breaks .. Have a 3.42 gear to install in my a6 car but I dont have the power to need a 28" tire (yet) but completely destroy the 17" radial anywhere but the track with the 3800 stall..
Thanks Ben
Burning Brakes
Joined: Jun 2003
Posts: 846
Likes: 105
From: Knoxville TN
Has anybody successfully ran a low pad height Weld RTS on a 15? I know Weld chart says to use medium but wondering if a low would work if caliper was ground down a good bit like we used to do on the f-bodys back in the day?
Heel & Toe
Joined: May 2019
Posts: 16
Likes: 2
Z06 15” conversion brakes/ lower control arms
I want to do a 15” conversion on my 07Z06. If I swapped down to a base model caliper and rotor would that fit the 15x10 wheels? Also will I need to shave down my lower control arms?
Advanced
Joined: Feb 2017
Posts: 78
Likes: 4
From: Carroll oh
you will need the caliper, rotor, 15” conversion knuckle, and the lower control arm clearance
Heel & Toe
Joined: May 2019
Posts: 16
Likes: 2
I’m tracking on the fact that I’ll need the conversion knuckle. I just feel like going a cheaper route than buying some $400+ brake kit. I’ve found base model calipers used for under $200, I feel like a base model corvette caliper/rotor will fit I was just wondering if anyone knows for sure.