Which front tire size to buy?

Discussion in 'Thumpers' started by stevemd, Nov 21, 2012.

  1. stevemd

    stevemd Adventurer

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    Oct 30, 2012
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    Mid-Maryland
    The stock front on my old xt250 is 3.00 X 21. I see that the Pirelli MT-90 A/T is available in 2 sizes: 80/90S and 90/90S. I did see a cross reference chart for dirt and street tires but unsure which category that Pirelli falls into.
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  2. kubiak

    kubiak Long timer

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    im sure both will fit, the 90 90 is a little wider but i always went for the bigger wider front tires in the 21 inch size.
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  3. itsatdm

    itsatdm Long timer

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    Go with the 90/90 tire. A little wider and taller than a 3X21, but the 80/90 has a shorter sidewall. Your rims will appreciate it.

    The inch tires are as tall as they are wide. The the first number of a metric measurement is the width, the second is height as a percentage of the first number.

    Thats what the measurements are supposed to mean, but the tires actually can be different depending on the manufacturer.
    #3
  4. stevemd

    stevemd Adventurer

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    Thanks guys and happy Thanksgiving
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