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Is it ok to swap tyre size to 225 40 18 from OEM?
Posted:
Tue Jul 13, 2010 10:55 amby nugsy
Hi guys im trying to find Kumho ku31s in Oem but cant get them in stock at the right price but can get 225 40 18 will this affect the car at all?
Re: Is it ok to swap tyre size to 225 40 18 from OEM?
Posted:
Tue Jul 13, 2010 12:23 pmby tangcla
Standard is 215/45/18 right? It'll be fine.
Stock size is 650.7mm; new size 637.2mm
This is within the +-15mm rule. Your speedo will be 2.1% too fast.
Re: Is it ok to swap tyre size to 225 40 18 from OEM?
Posted:
Tue Jul 13, 2010 2:08 pmby whitedog
+1 Im running 225 40 18 Federal 595 RSR semi slicks on MY07 GTB wagon, they are brilliant. The wider tyre also offers more rim protection than the standard 215.
Re: Is it ok to swap tyre size to 225 40 18 from OEM?
Posted:
Tue Jul 13, 2010 4:25 pmby Hobber
There is an info thread:
viewtopic.php?f=12&t=8756Specifically the link to the "Tyre/wheel sizes and offsets that will fit on a Liberty"
as well as an online tyre dimension comparison applet:
http://www.miata.net/garage/tirecalc.htmlwhich combined are great resources.
Re: Is it ok to swap tyre size to 225 40 18 from OEM?
Posted:
Sat Jul 17, 2010 12:09 pmby adhar
That tyre is technically designed for a 7.5 inch rim, and OEM is a 7 inch wide rim (unless you have STi wheels).
That being said i'm running the 225/40R18 Kuhmo KU36's on the OEM 18 inch x 7 inch wide rim with no problems.