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The TTR250 FAQ web pages -> TTR250 -> Repairs and maintenance -> 90/90-21 front tyre (Knobby)
Post Info TOPIC: 90/90-21 front tyre (Knobby)
Wobbles


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90/90-21 front tyre (Knobby)
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Can anyone please confirm whether there are any issues ie clearance with the fork boots with the above tyre size (it is a Dunlop Geomax AT81).

Apparently the 80/100-21 is not overly common and there is some doubt that it is actually narrower when mounted.



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petenz


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80/100/21...
very narrow with a high profile ..



..


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Bikes... 06 TTR250 / 09 XT660R / 1977 Montesa Cota 348 MRR / 1979 Montesa H6 125 Enduro...

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mossproof


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90/90x 21 should fit fine.
Simon.

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devon_rich


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90.90.21 is fine with a Michelin comp 4

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Wobbles


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Thanks for the replies. I can't believe how useless the tyre sizing system is with major variations even within the same brand.

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