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      01-29-2014, 01:52 PM   #1
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18" vs 19" wheels for autocross

Is there a benefit or drawback to either size? I have been focused on putting together an 18" set for autocross but have noticed a few wheels that I would like better in 19". With the same model tires/circumference, is there one that's better?
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      01-29-2014, 04:25 PM   #2
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The lighter the better. A lightweight 18" will be lighter than a lightweight 19" assuming similar price range. Some have even gone to 17" wheels if they will fit over the brake calipers. Another benefit is (generally) you have a larger selection of tires as the wheel diameter decreases and decreased tire cost.
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      01-30-2014, 03:45 PM   #3
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Yeah, neither. Get a 17" wheel. AutoX isn't about looks, so a 19" nice looking rim is the wrong choice. 17" wheel = lighter weight and cheaper tires!

http://www.apexraceparts.com/ARC-8-1...eel_p_150.html square setup with 265's! oh yeah!
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      01-30-2014, 09:28 PM   #4
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Quote:
Originally Posted by a_riddler View Post
Yeah, neither. Get a 17" wheel. AutoX isn't about looks, so a 19" nice looking rim is the wrong choice. 17" wheel = lighter weight and cheaper tires!

http://www.apexraceparts.com/ARC-8-1...eel_p_150.html square setup with 265's! oh yeah!
And you can change tire sizes (sidewall), which means you won't need to put a 4.10 in the diff. Smaller 17" tire will have a lower center of gravity also.
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      01-30-2014, 09:37 PM   #5
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Plus, high pressure will compensate for sidewall rollover. I think
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      01-31-2014, 09:10 AM   #6
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Quote:
Originally Posted by ZStig
Plus, high pressure will compensate for sidewall rollover. I think
But the higher pressure is going to reduce grip...a 40 series or even 35 if you go with wide tires would be best on 17's imo
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      02-02-2014, 11:48 PM   #7
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      02-03-2014, 07:07 AM   #8
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17s, if you can get them.

You need sidewall rollover to get maximum grip. Pressure will vary in order to get precise rollover at the arrows marked on the tire
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