80/100 - 21" vs 90/100 - 21" which is better?


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I have been using a starcross 5 soft 80/100-21 front and 110/100-18 rear on my 1980 yz250 and riding tracks with a dry, hard, surface like milestone, perris, and elsinore. I just got a 1981 yz 465 and it has a fairly steep steering angle, so it...


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