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Jun 27, 2008 19:35:18 GMT
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I know this has been discussed before but..
What would the difference be if I fitted 185/65/14 tyres instead of the correct 185/70/14? Does the one have a smaller diameter than the other or something? If so would it be safe??
they're for my Audi 100 BTW, It needs new tyres *urgently* and ive got a set of tyres in my shed doing nothing...
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1987 Maestro 1.6 HL perkins diesel conversion 1986 Audi 100 Avant 1800cc on LPG 1979 Allegro Series 2 special 4 door 1500cc with vynil roof. IN BITS. HERITAGE ISSUES.  |
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Jun 27, 2008 19:42:52 GMT
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As long as they're on the same axle, it'll make no difference.
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Jun 27, 2008 19:43:13 GMT
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The 185/65/14 tyre would be just over three percent smaller than the original tyre which would affect your gearing, speedo, fuel consumption etc. The tyre calculator below is very handy and at the the top it tells you to try and keep the sizes within 2.5% of each other but I would imagine 3% would not be too much of a problem  www.alloywheels.com/tyrecalc.asp |
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Jun 27, 2008 20:05:14 GMT
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Wow, thanks guys!
That tyre size thing is going into my favourites. The difference is only 2.11 MPH at 70 MPH. Not a problem really. It will only be a temporary measure until I sort out the alloys for it, they're also in my shed!
Its told me I need 195/60R15 for my alloys too. Great link!!
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Last Edit: Jun 27, 2008 20:10:11 GMT by Lankytim
1987 Maestro 1.6 HL perkins diesel conversion 1986 Audi 100 Avant 1800cc on LPG 1979 Allegro Series 2 special 4 door 1500cc with vynil roof. IN BITS. HERITAGE ISSUES. |
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paulw
Part of things
Posts: 216
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Jun 27, 2008 20:09:35 GMT
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you get a slight difference between different makes anyway, (and even as they wear out) so I wouldn't have thought that small a change would matter too much.
Changes of more than that can have weird effects on the geometry, like changing the scrub radius if there's a lot of KPI which is kind of the same as changing the offset, my Dart steered miles better after going from 60 series to 70 series tyres, which to be honest I didn't really expect...
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Lotus Seven
'58 Ford Special
64 Barracuda
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