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Old 10-14-2003, 07:04 PM   #1
Scooby Newbie
Member#: 39979
Join Date: Jul 2003
Question 225/40-18 or 235/40-18

I'm planning to get PFF7 18x8 on either one of these tire size for my STi, which size is better or any ideas? BTW, it will be used only during summer months.
225 vs 235, how the handling compare?
Is it even noticible? Pls give me some thoughts. Thank U.
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paikia is offline   Reply With Quote
Old 10-14-2003, 07:40 PM   #2
Scooby Specialist
Member#: 40189
Join Date: Jul 2003
Location: Portland, Oregon
2004 STi


If it helps at all the stock STi tire diameter is 24.97", a 225-40x18 will be about 25.09", and a 235-40x18 will be about 25.4".
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Old 10-22-2003, 01:15 AM   #3
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Join Date: Jul 2003

anybody have any ideas?!
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Old 10-22-2003, 01:29 AM   #4
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Member#: 22368
Join Date: Aug 2002
Chapter/Region: SCIC
Location: San Diego, CA
2011 WRX Limited
Obsidian Black Pearl


wider is better no?
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Old 10-22-2003, 09:44 AM   #5
Scooby Guru
Member#: 16157
Join Date: Mar 2002
Chapter/Region: South East
Location: Tallahassee, FL
'03 Mazda P5 <><
'02 WRX & '08 MS3 SOLD!!!


I'm running 225/40/18s T1-S' on my PFF7s and they've been great so far. They'll get their real test this weekend at the Subaru Challenge
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Old 10-22-2003, 11:22 AM   #6
Member#: 560
Join Date: Nov 1999
Chapter/Region: MAIC
Location: Woodbridge, VA
2006 STi, '11 A4
Crystal Gray, Silver


Wider is better, but the increase in diameter will cause the Speedo to read slower that the speed you're actually moving. Even worse with the 235/40's
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Old 10-22-2003, 12:39 PM   #7
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Member#: 5596
Join Date: Apr 2001
Chapter/Region: TXIC
Location: Houston, TX
2010 Honda Fit Sport


225/40r18 is already larger than stock in overall diameter. If you absolutely need 235, try 235/35 instead.

Larger diameter means you'll have taller gearing, and that may hurt your acceleration a bit. The car also sits slightly higher off the ground too.
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