235-40-17?
Jan 21, 2008, 10:17 AM
#1
Evolving Member
Thread Starter
Join Date: Sep 2007
Location: Las Vegas
Posts: 141
Likes: 0
Received 0 Likes
on
0 Posts
235-40-17?
So keeping a budget Im looking at the Falken RT-615 since I hear alot of good things about it and they're cheaper. Not good with tire science as you can tell with my probably stupid question. Are 235-40's no problem to use? Should I consider another size? I'm on Swifts with stock 17' BBS if that helps. 
Jan 21, 2008, 02:11 PM
#7
Evolved Member
iTrader: (1)
Join Date: Apr 2004
Location: Rochester, NY
Posts: 535
Likes: 0
Received 0 Likes
on
0 Posts
I know what you're trying to say... but no, it's pretty much a proven science that the 255s work great on the evos. Would it be better to put them on 9" rims? sure, but he'll be just fine on the stock ones until he's running a competition tire.
Trending Topics
Jan 21, 2008, 08:08 PM
#10
Evolved Member
iTrader: (10)
Join Date: Jan 2007
Location: Logan Ohio, USA
Posts: 1,092
Likes: 0
Received 0 Likes
on
0 Posts
After running a tire that is too wide for the rim, I would rather give up a little width and gain better overall performance by going with the smaller tire.
Yes, 255s work on stock rims, they are however sub optimal. Why spend more money on a heavier tire that won't work as well? Thats silly.
Please note, some tires such as RA1s however are often a little less money as 255/40s than as 235/45s which makes the choice harder. If I were putting another set of them on stock rims however guess which way I would go next time.
Yes, 255s work on stock rims, they are however sub optimal. Why spend more money on a heavier tire that won't work as well? Thats silly.
Please note, some tires such as RA1s however are often a little less money as 255/40s than as 235/45s which makes the choice harder. If I were putting another set of them on stock rims however guess which way I would go next time.
Jan 22, 2008, 12:54 PM
#14
For the reasons just mentioned above... the overall diameter is different than stock. This is not necessarily bad, just either desirable or not. this affects your final drive ratio, speedo, mileage, etc. If you are going to do it you should be aware of it.
Jan 22, 2008, 01:32 PM
#15
Evolved Member
iTrader: (1)
Join Date: Apr 2004
Location: Rochester, NY
Posts: 535
Likes: 0
Received 0 Likes
on
0 Posts
just so you're aware - the second number "45" is a percentage.
so you would say for this size "the sidewall's height is 45% of 245"
that's why you can't just get different width tires with "45" for the sidewall and explains why 255/40/17 would be correct.
so you would say for this size "the sidewall's height is 45% of 245"
that's why you can't just get different width tires with "45" for the sidewall and explains why 255/40/17 would be correct.