Thread: Cooper 255/55/19 LTZ on RRS

Is it ok to put 255 55 19 cooper ltz on my RSS 2007 td6 as aposed to the 255 50 19 tyres already fitted , which will need replacing soon ,this will raise the wheel diameter from 737mm to 763mm . Will mean a couple of ks difference in the speedo reading but will everything else be ok with no detrimental effects to the car ??? Thanks for any info ,Al.

Originally Posted by Fatso

Is it ok to put 255 55 19 cooper ltz on my RSS 2007 td6 as aposed to the 255 50 19 tyres already fitted , which will need replacing soon ,this will raise the wheel diameter from 737mm to 763mm . Will mean a couple of ks difference in the speedo reading but will everything else be ok with no detrimental effects to the car ??? Thanks for any info ,Al.

If it was my Sport that would be one of the first mod's I would do, 5% sidewall increase would just about correct the speedo difference too.
There will be no detrimental effects to the vehicle either. But also swap the spare so you have 5 matching tyre sizes otherwise if you have a flat this can cause issues/faults.
Cheers

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Originally Posted by Fatso

Is it ok to put 255 55 19 cooper ltz on my RSS 2007 td6 as aposed to the 255 50 19 tyres already fitted , which will need replacing soon ,this will raise the wheel diameter from 737mm to 763mm . Will mean a couple of ks difference in the speedo reading but will everything else be ok with no detrimental effects to the car ??? Thanks for any info ,Al.

I run my RRS on the 255/55/19's, have done for the last 60,000 miles. No detriment whatsoever. Slightly different ride quality, not as harsh as the 50 profile but it will feel a bit more 'rolly' in the corners, the higher sidewall moves a bit more laterally.

Thanks for the info sounds like a goer to me, just did not want to get into the rim changing bit . Could never quite work out why RSS had 255 50 19 and d3 had 255 55 19 , may be the extra weight of the D3? . 60000 Ks is a fair and reasonable amount of recomendatin . Thanks, Al .