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Thread: Anyone know

  1. #1

    Anyone know

    I want to put some General Grabber AT tyres on my Shogun but they do not make them in 285 x 55 x18 but closest the do is 285 x 60 x 18
    Would it be ok to change the profile from 55 to 60 ?

  2. #2
    As long as you have the clearance there should be no problem. It might affect your speedo but I believe this would be less than 1% so not much to worry about.
    Best Regards,
    Adrian.

    Jedward. The reason why there are two barrels on a shotgun.

  3. #3
    As above check clearance, may affect on full lock.
    My Hilux will take 65 profile tyres but I put 70 profiles on it (17") and they rub the under arches on full lock. But the scraping gets less as the tyres & arch liners wear out.

  4. #4
    The 60 series tyre would be about 30mm greater in diameter than your 55 series as fitted at the mo which would equate to your speed of 74/75mph for a speedo reading of 70mph.

  5. #5
    I agree with both of the above. I went bigger and they rub and they also affected my speedo about 5mph. (actually making it spot on!!)

  6. #6
    Quote Originally Posted by hogey View Post
    I want to put some General Grabber AT tyres on my Shogun but they do not make them in 285 x 55 x18 but closest the do is 285 x 60 x 18
    Would it be ok to change the profile from 55 to 60 ?
    All you need is Pi ......

    Rolling Circumference:- 285/55/18 = 2324 285/60/18 = 2410 diff = 86mm

    Speedo error @ 70mph the actual speed is 72.6mph - so 3.7% true difference (cumulative mileage will be out to same degree)
    ATB
    If I'm going to be accused of it then it's just as well I did it.

  7. #7
    This is quite a handy tool for doing the speedo and outer diameter comparisons....

    Tire size calculator

    For your sizes...

    Click image for larger version. 

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  8. #8
    thanks for all the replies.some good technical info there

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