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Thread: Tyre size comparisons

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  1. #1
    Join Date
    Apr 2010
    Location
    Japan
    Posts
    412

    Tyre size comparisons

    My Beat came with some odd-seeming tyres so I wanted to check how far away from stock diameters they are. There are scads of tire-size calculators around but here is the best and most fun one I've seen.

    http://www.ajdesigner.com/fl_tire/tire.php

  2. #2
    Join Date
    Nov 2008
    Location
    Canadian prairie
    Posts
    221
    I like to use http://www.miata.net/garage/tirecalcold.html because it has pictures/visual

  3. #3
    Join Date
    Apr 2010
    Location
    Japan
    Posts
    412

    replacement tire size advice....

    My car has 145/70-13 and 155/65-14 Michelins on stock "telephone dial" wheels. I recently discovered a certain lack of emergency stopping power and would like to increase sizes a bit. How would 165/60-13 and 175/60-14 work out? The rear would be about 1/2" taller and the front about the same as now, just more rubber on the road all round.

    Or can I go any wider with the stock wheels?

    Thanks,

    Steve


    Past Hondas:
    1960 125cc Honda Benly CB92R
    1964 305cc Super Hawk CB77, the only vehicle I have ever bought new in my life!
    Honda CB160, roadraced as 175cc 1967-1970.
    Honda Lawnmower, bought used in 2003, caught fire and melted in 2005.

  4. #4
    Join Date
    Nov 2008
    Location
    Canadian prairie
    Posts
    221
    Here on cobble trails, we like a tall tire. I installed 175/70R14 on rears and have had some rubbing issues under spirited driving. A roll of the wheel pinch weld would easily do. 170/s probably wouldn't scrub. just haven't got around to rolling mine yet. I've got the Sparco rims but believe they are the same offset etc. as your "dials.
    b.
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  5. #5
    Join Date
    Aug 2002
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    Kent
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    Quote Originally Posted by steveinjapan View Post
    I recently discovered a certain lack of emergency stopping power and would like to increase sizes a bit. Steve
    Its not added tyre size you need, just some weight over the front wheels

    Just put some bags of sand in the front in place of the spare wheel
    Steve M
    __________________

    Its all gone Norfolk!!!
    Now in the Lotus position.

  6. #6
    Join Date
    Apr 2010
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    Japan
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    Quote Originally Posted by Steve_M View Post
    Its not added tyre size you need, just some weight over the front wheels

    Just put some bags of sand in the front in place of the spare wheel
    Or maybe find a passenger who isn't afraid of driving with me.

    Seriously, could I go as wide as 175/60 or 185/60 on the rears? A tad extra height would be good too.
    Last edited by steveinjapan; 22-11-2010 at 10:48 AM.


    Past Hondas:
    1960 125cc Honda Benly CB92R
    1964 305cc Super Hawk CB77, the only vehicle I have ever bought new in my life!
    Honda CB160, roadraced as 175cc 1967-1970.
    Honda Lawnmower, bought used in 2003, caught fire and melted in 2005.

  7. #7
    Join Date
    Jul 2006
    Location
    SoYo
    Posts
    760
    we had 175/60 potenzas on the back of ours for a bit. it drove fine without any issues on a 6" rim but i didnt like the way it looked at all - they looked quite ballonish compared to the fronts (165/55) on a 5.5" rim.
    after a lot of looking around at what the japanese guys were running i switched to 185/55 on the back and 165/55 on the front and its perfect (advan A048's).
    ive had no probs at all until i had to roll the rear arches for lower offset wheels and that was only really because the car is lowered a lot.

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