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27th September 2010, 18:10 | #11 | |
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Quote:
http://www.kouki.co.uk/utilities/vis...ize-calculator
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• • • • • • • • Steve “People say nothing is impossible, but I do nothing every day.” Winnie-the-Pooh |
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27th September 2010, 18:57 | #12 |
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ok...... as of now i have a choice of the unions or the crowns, as i am refurbing the crowns as they were badley kerbed and tbh as this is my first refurb, am quietly pleased with them, i am inclined to put those on.
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27th September 2010, 19:13 | #13 |
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The Crown wheels fitted to early 75's had tyres 205x65xR15 they were invarably Continental tyres and they gave the best ride.
The 16" Unions were fitted with 215x55xR16 tyres again usually Continental tyres. Continental tyres give a good and quite ride but are expensive.. Dave T |
27th September 2010, 19:29 | #14 | |
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75 tourer cdti, MG ZS 180, nissan terrano & 1.8t rover 25 Join Date: Feb 2010
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Quote:
if i were you, i would personally put 225/50/17 tyres on. this will give a slightly better ride, but you may find these are slightly more expensive. in terms of the tyre, this size is a compromise the 15" have a rolling radius of 203.42 the 16" have a rolling radius of 201.97cm and the 17" with an aspect ratio of 50 have a rolling radius of 206.34cm with 45 tyres on, it is 199.27 so really, 50 tyres are closer to standard 15", but likewise 45 are closer to 16". 55 tyres are too big, so the desicion is upto you
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27th September 2010, 21:23 | #15 |
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Which is good assuming that the speedo is absolutley accurate in the first place which they are not. The error I estimate is about 8% according to Road Angel it always shows the car speedo as reading faster than actual road speed.
When each car came off the line did they calibrate the speedo for each and every different tyre size? Just wondered as an afterthought.
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27th September 2010, 21:36 | #16 |
I really should get out more.......
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generally its upto 10% discrepancy, but normally upto around 8% (as you say, but remember satnavs arent 100% accurate, and generally read only to a couple of %) i would have thought they would have been calibrated the same, so regardless of the wheel size. i would have also thought the speed sensing device would have been standard across the range, so calibration of each individual car would nt be required, just a few per batch?
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28th September 2010, 11:15 | #17 |
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But who know which are better for Rover 75 Saloon? 195/65/15 or 205/65/15? and why?
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28th September 2010, 13:31 | #18 |
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