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![]() | Home > Wheels & Tyres > 21" L405 Wheels on a L320 RRS? |
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Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 5041 ![]() ![]() ![]() |
I have been running 275/45 x 21" SVR wheels and tyres on my MY13 S/C L320 for nearly 5 years now and have had absolutely no issues with the brakes or anything else whatsoever. The speedo is spot on and the ride fine, the offset is no issue either. Oh and welcome to the forum. Can I ask how you deduced there would be a 7% reduction in braking efficiency?
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JAMES-SURREY Member Since: 26 May 2020 Location: KT14 7EJ Posts: 5 ![]() ![]() |
That's much appreciated Col. Thank you.
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Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 5041 ![]() ![]() ![]() |
The SVR rims I have fitted are the old original diamond cut 21" style wheels that were on the first cars, hence why they are nearly 5 years old now. Don't have many pictures I'm afraid.
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JAMES-SURREY Member Since: 26 May 2020 Location: KT14 7EJ Posts: 5 ![]() ![]() |
Sorry yes in answer. If the Radius is 7% larger you have a 7% longer moment of fulcrum/Road contact dimension that the brakes are trying to stop. Also heavier the wheel the higher Inertia of the spinning wheel that the brakes are trying to counteract. Interesting read here if you ever want some bed time reading: https://beefedupbrakes.com/blog/heavier-wh...-distance/ |
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JAMES-SURREY Member Since: 26 May 2020 Location: KT14 7EJ Posts: 5 ![]() ![]() |
Thank you - I must say it looks 'right' for the arch |
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Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 5041 ![]() ![]() ![]() |
I think I'll give the read a miss and just put my faith in the six pot brembos thank's. |
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JAMES-SURREY Member Since: 26 May 2020 Location: KT14 7EJ Posts: 5 ![]() ![]() |
Good to hear thanks Col |
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Tyrefitter Member Since: 19 Jul 2015 Location: Bridlington East Yorkshire Posts: 3677 ![]() ![]() ![]() |
Ive got some 22's for sale.
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Dave B Member Since: 10 Oct 2019 Location: East/West Sussex Coast Borders Posts: 431 ![]() ![]() ![]() |
I had to decide which to fit to mine, both 245/45x21", the first in Sparkle Silver
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Julio Member Since: 24 Jul 2020 Location: Mere Posts: 13 ![]() ![]() ![]() |
Hi all,
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knwatkins Member Since: 09 Sep 2018 Location: Poole, Dorset Posts: 1139 ![]() ![]() ![]() |
I have 255/55/20 which are 787mm diameter. 275/45/21 are 780mm diameter so no problems there. The width however is 20mm greater. As above, Col has been running the same size so it appears you'll be fine.
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Julio Member Since: 24 Jul 2020 Location: Mere Posts: 13 ![]() ![]() ![]() |
Cheers Kev, appreciate your advice.
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RRSTDV8 Member Since: 12 Aug 2011 Location: Northamptonshire Posts: 9022 ![]() ![]() ![]() |
Any vehicle that came with 20 inch as standard has the damped steering, and all later models have it fitted too. So any SC or TDV8 will have the damped steering rack anyway. 2012 SDV6 - it's missing a couple of cylinders 2008 TDV8 - it was a labour of love and is much missed |
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knwatkins Member Since: 09 Sep 2018 Location: Poole, Dorset Posts: 1139 ![]() ![]() ![]() |
I agree, Wayne. Kev
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