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Old 12-28-2010, 11:01 PM   #80
mousitsas
Beastly Adventurer
 
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Joined: Oct 2008
Location: Athens, Greece
Oddometer: 2,535
Quote:
Originally Posted by The Griz View Post
Flat tires have nothing to do with it. Where did that come from?

BMW put the 21" front wheel there for a reason. The larger 21" front wheel rolls over uneven terrain much easier and smoother than a 19" or 17". I like to ride my F8 on gravel, fire roads, and trails. The 21 incher is essential.

Put it this way: That smaller the wheel, the harder time it has rolling over things.
This is obvious Griz, but my point is that you need more a tubeless on the back than on the front. And for your bikes, you have to choose between a 3.5-17 and a 5.0-17.
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