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      10-06-2020, 08:28 AM   #398
3GFX
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Drives: 2003 BMW Z4 3.0i
Join Date: Sep 2015
Location: Ontario

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Quote:
Originally Posted by 3GFX View Post
Originally Posted by 3GFX View Post

NUMBERS!...for those looking in the future:

Stock Front 18 x 8.0 ET47 // 225/40R18
Stock Rear 18 x 9.5 ET50 // 255/35R18

Rotiforms Front 19 x 8.5 ET35 // 235/35R19
Rotiforms Rear 19 x 10 ET40 // 265/35R19

Hypergram Front 18 x 8.5 ET35 // 235/40R18
--6mm more clearance than stock on inner, same as Rotiform
--18mm extended outer over stock, same as Rotiform
Hypergram Rear 18 x 9.5 ET35 // 265/35R18
--2mm more clearance than stock on inner, 11mm more clearance than Rotiform
--28mm extended outer over stock, 1mm less extended than Rotiform

Ultraform Front 18 x 8.5 ET38 // 235/40R18
--3mm more clearance than stock on inner, 3mm more clearance than Rotiform
--18mm extended outer over stock, 3mm less than Rotiform
Ultraform Rear 18x x 9.5 ET36 // 265/35R18
--1mm more clearance than stock on inner, 27mm more clearance than Rotiform
--27mm extended outer over stock, 2mm less extended than Rotiform

Front Tires:
225/40/18 - stock
--DIA 25.09"
--CIRC 78.81"

235/35/19
--DIA 25.48"
--CIRC 80.04"

235/40/18
--DIA 25.40"
--CIRC 79.80"

Rear Tires:
255/35/18 - stock
--DIA 25.03"
--CIRC 78.63"

265/35/19 (hard to find from some manufacturers)
--DIA 26.30"
--CIRC 82.63"

275/30/19 (running as of May 2019, same rims no issue)
--DIA 25.50"
--CIRC 80.10"

265/35/18
--DIA 25.30"
--CIRC 79.49"

(Hoping to run at some point)

Pirelli PZERO Slicks "DH"

Front
235/645/18
--DIA 25.40"

Rear
265/645/18
--DIA 25.40"


Currently on the search for more meat in the front end without rubbing.

Current track setup for front:

Ultraform Front 18 x 8.5 ET38 // 235/40R18
--3mm more clearance than stock on inner, 3mm more clearance than Rotiform
--18mm extended outer over stock, 3mm less than Rotiform

Option is to run the current rear setup on the front as well:

Ultraform Rear 18x x 9.5 ET36 // 265/35R18
--11mm LESS clearance than current front setup
--EXTEND an extra 15mm over current front setup.
-Compared to stock
--8mm LESS clearance than stock front setup
--EXTEND an extra 30mm
--Technically this would only extend past my rotiform 19" setup by 12mm

I'm thinking this is doable, worst case may rock more camber for the track.


I have not tested this, but I will and report back.
Appreciate 0