Help calculating my offset - Club Lexus Forums

Go Back   Club Lexus Forums > Lexus Special Interest Forums > The Tire Rack's Tires, Wheels & Brakes Forum
Log In 

Help calculating my offset

Thread Tools Search this Thread
Old 10-13-13, 05:27 PM   #1
Pole Position
Trader Score: (8)
Join Date: Apr 2012
Location: LA
Posts: 293
Default Help calculating my offset

Hello guys, I need help figuring out the offset of my new wheels. I measured by first calculating whole width of the wheels. fronts were 9 inch wide and rear were 10 inch wide. Then I put a piece of wood on top of the rim with the front facing down. I measured the length from the surface of the " back mount face" to the bottom of the piece of wood. I measured 6.5 inches for the front and 7.25 for the rear. So 6.5-4.5=2 and 7.25-5=2.25. Convert to mm and I got +50.4 for the front and +57.15 for rear. Is this correct? I test fit the rims on my LS430 and they go out past my fenders. The offsets should be conservative so I dont know. Any help is appreciated. Thanks
doodoo is offline   Reply With Quote
Old 10-16-13, 08:47 PM   #2
Maintenance Moderator
Trader Score: (2)
mitsuguy's Avatar
Join Date: May 2005
Location: AZ
Posts: 6,339

you measuring sounds correct, but I would bet the offsets are more like +40 / +45

technically measurements are supposed to be taken from the bead area of the tire, which is difficult to do accurately...

are you sure your numbers are exact? even 1/4" is 6.3 mm
-cody: maintenance forum moderator
2001 Lexus IS300 - 650whp/610wtq (Virtual Dyno)PTE 6765/AEM Infinity - Auburn Sky Pearl (1 of 1348)
2007 Lexus GS450h
2010 Lexus RX350
1998 Lexus GS300 - 1jz-GTE swap
1999 Isuzu VehiCross 285/75-16 Destination MT's - Astral Silver Metallic (1 of 1021) (for sale)
mitsuguy is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
Getting a handle on wheel sizing & offsets A Preliminary Guide DS2k IS F (2008-2014) 26 09-18-15 02:29 PM
need some help with measurements Epik GS - 1st Gen (1993-1997) 1 09-15-14 10:15 PM
Just did my own alignment, 1990 LS400 climberd LS - 1st and 2nd Gen (1990-2000) 15 02-03-14 12:58 PM
How to calculate offset? speeds27 The Tire Rack's Tires, Wheels & Brakes Forum 7 11-02-10 06:38 PM
Final Calculations after barrel/and or lip change and Tire Rolling Diameters c4lvin The Tire Rack's Tires, Wheels & Brakes Forum 1 03-03-10 01:07 PM

lexus, measure, offset

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 02:18 PM.

Copyright © 2000-2015 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS