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crooks_uk
Member Since: 04 Jul 2017
Location: Newcastle-upon-Tyne
Posts: 42
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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?
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17th Nov 2021 5:52 pm |
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NJSS
Member Since: 06 May 2009
Location: Catherington, Hampshire.
Posts: 10844
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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.
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17th Nov 2021 7:13 pm |
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crooks_uk
Member Since: 04 Jul 2017
Location: Newcastle-upon-Tyne
Posts: 42
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Is it as simple as using half of the new tyre diameter? 405 in this case?
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17th Nov 2021 7:17 pm |
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M3DPO
Member Since: 22 Sep 2010
Location: Notts.
Posts: 8244
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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
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.
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17th Nov 2021 8:02 pm |
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galwaygreen
Member Since: 30 Oct 2011
Location: plymouth
Posts: 6525
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interesting link NJSS...thank you....8 feet in one rev... surprising
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18th Nov 2021 12:11 am |
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