Tire size Question
Thread Starter
Advanced
Joined: Dec 2005
Posts: 54
Likes: 0
Tire size Question
Does anyone know if there is a standard ratio to rpm drop or gain when changing the tire heights?
Im running a 26" tire with a set of 390 gears in a c5 and im trying to find out how many rpms i will lose on a 28" tire through the traps. i was told there is a standard ratio to figure that out.
Im running a 26" tire with a set of 390 gears in a c5 and im trying to find out how many rpms i will lose on a 28" tire through the traps. i was told there is a standard ratio to figure that out.
Tech Contributor
Joined: Jan 2004
Posts: 20,030
Likes: 289
From: Wylie TX --> Less is More, except under the hood !
Try this link:
http://www.rims-n-tires.com/rt_specs.jsp?
Input your curent rim sizes, and tire sizes.... then input your proposed sizes and it tells you all about the difference.
Toque
http://www.rims-n-tires.com/rt_specs.jsp?
Input your curent rim sizes, and tire sizes.... then input your proposed sizes and it tells you all about the difference.
Toque
Le Mans Master
Joined: Sep 2004
Posts: 5,707
Likes: 4
From: Los Angeles
Easy. Changing from 26 to 28 is 28/26=1.0769 or 7.7% for a standard ratio in your situation. Divide your rpms by 7.7% or 1.077 to get your desired results. If you trapped at 5,000rpm before it will now be 5,000/1.077=4642
Burning Brakes
Joined: May 2005
Posts: 992
Likes: 2
From: Granville Ohio
St. Jude Donor '06-'07-'08-'09-'10-'11-'12-'13-'14-'15-'16'17-'18-'19-'20-21
