IW STi Forum banner
Cancel
Create thread New Garage Forums

Offset for stock vs new rims

Jump to Latest
1.3K views 3 replies 3 participants last post by  knyg  
T
#1 ·
Hi! I am looking to replace the stock rims on my 2021 STI, however, I am not sure what the offset is for the stock ones, or if it is dependent on the new rims. They seem to offer a few choices.
Any input will help me, thank you!!
 
#4 · (Edited)
I recommend you go with the typical wheel size when upgrading.

18"x9.5" +38mm with 255/35/18 tires
or
19"x9.5" +38mm with 245/35/19 tires

^
19 inch height of the rim
9.5 inch width of the rim
38 millimeters offset from center hub

245 width of the tire (measured in mm, milimeters)
35 is the aspect ratio of the sidewall, relative to the width. meaning 35% of 245 = 85.75mm
19 is the rim size
 
IW STi Forum
posts
4.1M
members
124K
Since
2001
A forum community dedicated to Subaru Impreza and STI owners and enthusiasts. Come join the discussion about performance, engine builds, exhaust, modifications, troubleshooting, maintenance, and more!
Full Forum Listing
Explore Our Forums
GD-General 2.5 Liter/Litre Factory Motor GD-Members' Journals General Subaru Discussions 2015+ STI Discussion