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Best tire sizes for autocross? by Shill
Started on: 07-15-2013 04:30 PM
Replies: 4 (312 views)
Last post by: Shill on 07-15-2013 07:51 PM
Shill
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Report this Post07-15-2013 04:30 PM Click Here to See the Profile for ShillSend a Private Message to ShillEdit/Delete MessageReply w/QuoteDirect Link to This Post
Wanted to set up my car for autocross me that I have a second daily driver. Been using 215/45/17 front and 235/45/17 rear. I like the look of wider tires such as 255 in rear with coilovers. But really what sizes are optimal? Assuming I am buying performance tires designed for it.
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Arns85GT
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Report this Post07-15-2013 04:51 PM Click Here to See the Profile for Arns85GTClick Here to Email Arns85GTSend a Private Message to Arns85GTEdit/Delete MessageReply w/QuoteDirect Link to This Post
for autocross you want a low profile. The smaller radius gives you the edge. Notice how many tall tires there are on the course? Right.

You also want sticky compound.

That's the best I can offer.

Arn
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Shill
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Report this Post07-15-2013 07:01 PM Click Here to See the Profile for ShillSend a Private Message to ShillEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by Arns85GT:

for autocross you want a low profile. The smaller radius gives you the edge. Notice how many tall tires there are on the course? Right.

You also want sticky compound.

That's the best I can offer.

Arn


Low profile, as in i am fine with 215 and 255, but I should look into getting 215/35/18 and 255/35/18? or 35/17?
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daveg
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Report this Post07-15-2013 07:32 PM Click Here to See the Profile for davegSend a Private Message to davegEdit/Delete MessageReply w/QuoteDirect Link to This Post
Compound is more important than size. For size I lie to use something common, so hopefully you can score some from a road race team.

225/50-15 is great, if your brakes still fit inside a 15" rim.

225/45-17 from GrandAm competition cars
235/40-17 is great

The larger rims usually weigh more, and this hurts acceleration a bit.

Daveg
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Shill
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Report this Post07-15-2013 07:51 PM Click Here to See the Profile for ShillSend a Private Message to ShillEdit/Delete MessageReply w/QuoteDirect Link to This Post
 
quote
Originally posted by daveg:

Compound is more important than size. For size I lie to use something common, so hopefully you can score some from a road race team.

225/50-15 is great, if your brakes still fit inside a 15" rim.

225/45-17 from GrandAm competition cars
235/40-17 is great

The larger rims usually weigh more, and this hurts acceleration a bit.

Daveg


With my research, i've found that the tires actually weight more than the wheels. the 17" wheels I found are about 16.5lb where the 215/45 tires are about 22.5lb

which theoretically should be somewhere around 40lb

[This message has been edited by Shill (edited 07-15-2013).]

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