Tire size chart
#2
RL Community Team
Rennlist Member
Rennlist Member
As long as you can do math, use the Tirerack tire specs page and compare the revs per mile - a difference between front and rear tire that is greater than 1% radius is not advised.
#3
Rennlist Member
And you want more revs in the rear than front.
#4
RL Community Team
Rennlist Member
Rennlist Member
#5
You'll want to look at the tire sizes individually as each manufacture and actual tire model can vary in size even if they are the same "size" (eg 305/30R19). Tire rack has a good wealth of info on this when you look at the individual models of tires. Click "specs" after going to the link below to see the data tirerack has. Just find the tire models your interested in.
example: https://www.tirerack.com/tires/tires...omCompare1=yes
example: https://www.tirerack.com/tires/tires...omCompare1=yes
#7
RL Community Team
Rennlist Member
Rennlist Member
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#8
The chart shows 1.9% difference with the sizes on my car. Fine tuned with specific tires will of course show some differences but 2.9% for stock sizes is huge and no tire brand will bring it down to the 1% difference limit. Can't speak for the validly of the calculator.
#9
Michelin pilots are what on my car and according to the specs:
225/40/19 = 797rpm
305/30/19= 788rpm......the difference is .9887
Last edited by emptypockets; 07-26-2018 at 02:16 PM. Reason: corecting tire size
#10
Rennlist Member
Stock tire sizes are 225/40/18 and 295/30/18.
#11
Do some googling on this, this has been covered multiple times on various forums over the years. PS, pics of car or link to ad you found it on? Looks nice in the avatar, I don't remember seeing it listed localy. Going to Redmond Town Center Exotics this Saturday?
#13
What is going on at Redmond Town Center Exotics?