Feckin' strange size tyres

[Rob Earl]

My calculations were for a flat wheel[:I]
[26][21]

Don't drink drive! Not only is it socially unaceptable, it also harms A2's.
Was a 1.4SE petrol. http://www.audi-a2.co.uk/uk14.htm http://www.audi-a2.co.uk/safety.htm
New A2 - Ebony Black, Red Leather, CC, Symphony + all the previous options we had.

 

[shezlee]

quote:Originally posted by smartboost

The rolling circumference of the 195/50R16 tyre is 1889 mm, and the 185/50R16 tyre is 1858 mm. Hence, the rolling circumference of the 195/50R16 tyre is 1.7% larger than the 185/50R16 tyre.

Calculations for the diameter of the 195/50R16 tyre:
(16 x 25.4) + (2 x 195 x 0.5) = 601.4 mm

Calculations for the diameter of the 185/50R16 tyre:
(16 x 25.4) + (2 x 185 x 0.5) = 591.4 mm

Therefore, by changing to the larger tyre you are adding 5mm to the radius

Confused????
The second part of the equation dosen't make much sence.
(2 x 185 x 0.5) = 185 .... Whats the point in having this calculation??

Lee and Sheridan,
TDI SE, Build 11/01, Dolphin Grey
50% Brighter Bulbs : Audi 6 CD Changer : Rear drinks holder : Floppy Wiper : Centre Tray : Elasticated Belt System : Chrome Numberplate Surround : A3 Transmission Nets : Heated Mirrors

 

[ianjohnsonws14]

It makes sense if your aspect ratio is anything other than 50%!

See also http://www.chris-longhurst.com/carbibles/index.html?menu.html&tyre_bible.html where there is a comparator.

Ian

2002 1.4 Petrol SE, silver with climate control.
Why are NEARLY all the A2s in Lichfield are silver ? ? ?

 

[ltopham]

I stand corrected! Good info guy's. I guess the clue was in aspect RATIO</u>! You learn something new every day. I priced up the 195/50/16 and could't find much of a difference in price compared to the 185/50/16. I have found a site www.etyres.co.uk there prices seem v.competitive and they will fit/balance on your drive at no extra cost, how's that for service! Has anyone any experience of them? I thought I might get a few thou miles more from my fronts but this winter weather is starting to show how worn they are getting.

All the best,
Lee

Lee T
'02' A2 TDI SE
Ebony Black

 

[Stuart_D]

Haven't had any experience of them (yet) but we do have 'etyres' in the A2OC members marketplace with a discount against them! So members bare this in mind if you are shiopping around.

[img=left]http://www.a2forum.net/stuart.gif[/img=left]Stuart Diamond: A2OC Founder | Forum Administrator

2001 TDi SE:http://www.audi-a2.co.uk/uk1.htm Cobalt Blue Metallic | Open Sky Roof | Kenwood Mask CD | Front Centre Armrest | Front Centre Tray

A2OC Website | A2OC Forum | Join the A2OC!

 

[mlarner]

I always get mine from Micheldever Tyres just off the A303 near the station.
Fantastic stock & prices.
Usual disclaimer - just a well satisfied customer.
They had 17" A2 Sport Michelins in stock when I needed one.

2002 FSi SE, Ebony Black with Red Nappa Leather, 17" Sport Wheels, Tinted Security Glass