Hawk speed wobble - new rider question

[pete]

Originally Posted by Bill1

I've been thinking about different tires. My problem is I ride 90-95 street and then it goes from pavement to sugar sand or mud.

Shinko 700.................





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[jimwildman]

Originally Posted by timcosby

i think its the actual geometry of the bike(rake and trail). i get a half a second wobble when hitting a bump going faster that 50. seems to be a high speed wobble that is induced from the geometry.

I couldnt agree more, the rear is too high and the forks not long enough. the trail has been jeopordized. lowering the rear makes this go away, and the bike corners much more confidently to boot.

[timcosby]

thats probably why changing tires makes it go away too. just a little diff in rear height of the tire changes the trail ever so slightly.