Advertise on DISCO3.CO.UK
Forum · Gallery · Wiki · Shop · Sponsors
  Home · FAQ · New Posts · My Posts · PMs · Search · Members · Members Map · Groups · Profile · Donate · Register · Log In  
DISCO3.CO.UK > IIDTool Help

Tyre Rolling Radius
Post Reply  Down to end
Page 1 of 1
crooks_uk
 


Member Since: 05 Jul 2017
Location: Newcastle-upon-Tyne
Posts: 39
Tyre Rolling Radius

Just changed to 275/55r20 mud tyres. Does anybody know the correct rolling radius setting value to use? Tyres are 811 mm in diameter. Do I just halve this value or is there more to it?  
Post #226280817th Nov 2021 6:52 pm
View user's profile Send private message View poster's gallery Reply with quote
NJSS
 


Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10492

United Kingdom 2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo GreyDiscovery 4

Look here:-

https://www.tyresizecalculator.com/tyre-wh...dimensions

NJSS Am I Gammon or Woke ? - I neither know nor care.

2016 Discovery 4 Landmark
2011 Mercedes Benz SL350 (R230)
1973 MG B GT V8 - 3.9L John Eales engine, 5 speed R380 gearbox, since 1975.
1959 MGA roadster - 1.9L Peter Burgess Engine - 5 speed gearbox
Past LRs - Multiple FFRs, Discos & a Series I - some petrol, some diesel,
none Electric or H2 fuel cell - yet.
There are 10 types of people in this world: Those who understand binary, and those who don’t.  
Post #226282317th Nov 2021 8:13 pm
View user's profile Send private message View poster's gallery Reply with quote
crooks_uk
 


Member Since: 05 Jul 2017
Location: Newcastle-upon-Tyne
Posts: 39

Is it as simple as using half of the new tyre diameter? 405 in this case?  
Post #226282717th Nov 2021 8:17 pm
View user's profile Send private message View poster's gallery Reply with quote
M3DPO
 


Member Since: 22 Sep 2010
Location: Notts.
Posts: 8101

England 2014 Discovery 4 3.0 SDV6 HSE Lux Auto Corris GreyDiscovery 4

That I don’t know from memory, but if you scroll down the potions on the Iid tool it will give options in tyre sizes, I don’t know if your size is there but to check your choice simply drive through a digital speed sign Thumbs Up
If the sizes on the Iid tool are circumference mm you need 2547mm for new tyres in your size.
255x55x19 = 2400. It can when others can't,
It will when others won't,
It goes where others don't.  
Post #226283817th Nov 2021 9:02 pm
View user's profile Send private message View poster's gallery Reply with quote
galwaygreen
 


Member Since: 30 Oct 2011
Location: plymouth
Posts: 6525

United Kingdom 2016 Discovery 4 3.0 TDV6 Graphite LE Auto Loire BlueDiscovery 4

interesting link NJSS...thank you....8 feet in one rev... surprising  
Post #226287818th Nov 2021 1:11 am
View user's profile Send private message View poster's gallery Send e-mail Post Reply
Display posts from the last:  
Post Reply Back to top
Page 1 of 1
Jump to:  
< Previous Topic | Next Topic >


Posting Rules
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum



DISCO3.CO.UK Copyright © 2004-2024 Futuranet Ltd & Martin Lewis
DISCO3.CO.UK RSS Feed - All Forums
DISCO3.CO.UK is independent and not affiliated to Land Rover.
Switch to Mobile Site