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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: 4959 |
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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Tue May 26 2020 9:27am |
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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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Tue May 26 2020 9:34am |
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Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 4959 |
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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Tue May 26 2020 9:52am |
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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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Tue May 26 2020 9:55am |
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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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Tue May 26 2020 10:00am |
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Col Member Since: 02 Sep 2012 Location: Hawkes Bay NZ Posts: 4959 |
I think I'll give the read a miss and just put my faith in the six pot brembos thank's. never had any problems so far.
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Tue May 26 2020 10:12am |
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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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Tue May 26 2020 10:27am |
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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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Tue May 26 2020 11:57am |
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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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Tue May 26 2020 6:57pm |
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Julio Member Since: 24 Jul 2020 Location: Mere Posts: 13 |
Hi all,
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Sat Aug 01 2020 8:01am |
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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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Sat Aug 01 2020 8:39am |
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Julio Member Since: 24 Jul 2020 Location: Mere Posts: 13 |
Cheers Kev, appreciate your advice.
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Sat Aug 01 2020 9:46am |
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RRSTDV8 Member Since: 12 Aug 2011 Location: Northamptonshire Posts: 8958 |
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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Sun Aug 02 2020 7:38am |
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knwatkins Member Since: 09 Sep 2018 Location: Poole, Dorset Posts: 1139 |
I agree, Wayne. Kev
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Sun Aug 02 2020 7:52am |
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