Go Back   Team-BHP > Under the Hood > Modifications & Accessories > Tyre & Alloy wheel Section

Thread Tools Search this Thread
Old 28th January 2010, 14:58   #1
Join Date: Jan 2010
Location: Chennai
Posts: 4
Thanked: 0 Times
Red face Rolling Radius Formula

Hey people. I'm kinda new in team-bhp, and my first question is really technical.. i've been searching the net a lot and cant find the formula to calculate the rolling radius of a tire. I know there are online calculators, but i want to know the formula too....help!!!
abhaythomas27 is offline   Reply With Quote
Old 28th January 2010, 23:44   #2
Join Date: Nov 2008
Location: New Delhi
Posts: 690
Thanked: 152 Times

i guess you mean the rolling circumference which is 2x3.14xRadius.
Radius of tyre = sidewall height + rim radius .
For eg : 145/80R12 mean 145mm width , Tyre Sidewall Height = 116 mm , Rim Radius = 6inch = 152.399 mm.
So total tyre radius = Sidewall + Rim Radius = 116 + 152.399 = 268.39 mm
Now Total Rolling circumference = 2x3.14x 268.39mm = 1685.48 mm = 66.35 inch

However please not that this may vary for even the same tyre depending on air pressure as it changes the sidewall height.


Last edited by Trust_In_Thrust : 28th January 2010 at 23:46.
Trust_In_Thrust is offline   Reply With Quote
Old 28th January 2010, 23:51   #3
Distinguished - BHPian
Nikhilb2008's Avatar
Join Date: Jul 2006
Location: Bangalore
Posts: 4,992
Thanked: 6,637 Times

Car Bibles : The Wheel and Tyre Bible Page 3 of 4
Nikhilb2008 is online now   Reply With Quote

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Similar Threads
Thread Thread Starter Forum Replies Last Post
Rolling Rolling Rolling... BB311 Introduce yourself 3 29th April 2016 16:20
Fiat Premier Padmini - Shorter turning radius in reverse??? Shan2nu Technical Stuff 17 23rd July 2009 12:23
The Vehicle with the smallest turning radius in India mithun The Indian Car Scene 53 22nd July 2009 11:45
Shorter wheelbase but large turning radius...WHY? deepgautam_qa Technical Stuff 3 27th May 2009 13:32
How to decrease the Turning radius(Any Possible Mods)?? greatDrive Modifications & Accessories 14 3rd July 2007 12:24

All times are GMT +5.5. The time now is 14:50.

Copyright 2000 - 2018, Team-BHP.com
Proudly powered by E2E Networks