Matt George Posted November 11, 2012 Share Posted November 11, 2012 Hi all,I've been given a set of 'S' wheels for my 2000, and now need to source some suitable rubber. But what size is best? The car currently has 175/70 R14 tyres that, combined with a 3.45:1 diff, give a speedo that slightly under reads. I'd like to choose a tyre size that keeps thngs pretty much how they are, or ideally levels the speedo out. I'm currently thinking of 195/65, but am interested to hear any other suggestions.Thanks,Matt Quote Link to comment Share on other sites More sharing options...
CRAJ Posted November 11, 2012 Share Posted November 11, 2012 To get a proper speedo reading you would need a speedo from a 2.5pi Matt, the 2000 would originally have had a 4.11 ratio axle, so getting the speedo accurate by changing the tyres will be difficult. With the estate on 14" wheels I use 195/70/14 as the closest to the original 175/14 tyres.Colin. Quote Link to comment Share on other sites More sharing options...
Matt George Posted November 11, 2012 Author Share Posted November 11, 2012 Hi Colin,Agreed, a speedo to match the diff would be preferable, but to be honest it really isn't too bad the way it is now. I just don't want to throw the readings further out with a change of tyres!I think I'll have to work out the rolling radius of my current wheels and tyres, then do the same for the potential new combo, then choose tyres accordingly.Matt Quote Link to comment Share on other sites More sharing options...
2000ok Posted November 11, 2012 Share Posted November 11, 2012 This link may help you to choose your tyreshttp://www.alloywheels.com/Tyre_CalculatorSteve Quote Link to comment Share on other sites More sharing options...
AlanChatterton Posted November 11, 2012 Share Posted November 11, 2012 I always used 195/70/14 on S alloys. Quote Link to comment Share on other sites More sharing options...
Andy Borris Posted November 11, 2012 Share Posted November 11, 2012 I'd go with 185/70, personally think a 195 is a bit too wide for a 5 1/2 inch wheel, too tyre roll on the rim.I believe the Triumph used to fit 175/70 on these wheels?Andy Quote Link to comment Share on other sites More sharing options...
Raider Posted November 11, 2012 Share Posted November 11, 2012 1529 wrote:I'd go with 185/70, personally think a 195 is a bit too wide for a 5 1/2 inch wheel, too tyre roll on the rim.I believe the Triumph used to fit 175/70 on these wheels?Andy From my 1981 Michelin technical data bookOE was 175HR14 which can be translated as 175/80R14 although that's not absolutely strictly correct it's good enough ;)195/70R14 is fine on a 5 1/2J wheel, in fact the dimensions for static laden radius etc are based on the tyre being fitted to this wheel. By the 1996 tech data book it quotes a 6" wheel as the preferred one with 5 1/2 still OK. Quote Link to comment Share on other sites More sharing options...
AlanChatterton Posted November 11, 2012 Share Posted November 11, 2012 1529 wrote:I'd go with 185/70, personally think a 195 is a bit too wide for a 5 1/2 inch wheel, too tyre roll on the rim.I believe the Triumph used to fit 175/70 on these wheels?Andy Yes, standard was 175/80/14, but having run 195/70's for 20 years + on standard S alloys (and on my Stag too) they do work and fit just fine.Tried 185/70's once and they were just not grippy enough for me and looked "wrong". Quote Link to comment Share on other sites More sharing options...
Spider Posted November 11, 2012 Share Posted November 11, 2012 Try this, it accounts for different diffs/g'boxes/tyres.http://www.mintylamb.co.uk/gearspeed/ Quote Link to comment Share on other sites More sharing options...
CharliesStag Posted November 19, 2012 Share Posted November 19, 2012 I was under the impression that the S wheels used 185HR14s (now very expensive new) or was the just the earlier Stags? Quote Link to comment Share on other sites More sharing options...
CRAJ Posted November 19, 2012 Share Posted November 19, 2012 4666 wrote:I was under the impression that the S wheels used 185HR14s (now very expensive new) or was the just the earlier Stags?Just the Stag Quote Link to comment Share on other sites More sharing options...
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