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Curved vs. Straight forks?

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Curved vs. Straight forks?

Old 09-23-09, 08:57 PM
  #26  
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Originally Posted by Wogsterca View Post
Nobody else has said this, so I will, a curved fork tends to increase the fork rake, and as you increase the rake, the front wheel becomes more and more likely to self-centre, making for fewer wheel adjustments to maintain a straight tracking. This is because the weight load on the front wheel is behind the wheel, to a lesser degree you will see the same thing on items, like shopping carts that have offset wheels.
**********???? Trail is the distance which the vertical projection of the front axle with the pavement trails behind the intersection point of the projection of the centerline of the head tube with the pavement.

More fork curvature (increasing fork rake) moves the axle forward and REDUCES trail thus making the front wheel LESS likely to self center and be less straight tracking.

Obviously head tube angle plays a big part in this.
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Old 09-24-09, 07:40 AM
  #27  
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Originally Posted by Wogsterca View Post
That would be true for road bikes, however most shock type MTB forks do absorb some vibration. I think the biggest reason for road vibration causing problems is tire pressure. If you have a 23mm wide tire inflated to 120PSI, and you have a lot of problems with road buzz, then try a little lower pressure on the front tire, say 95-105PSI, see if that helps. The biggest advantage to the pneumatic tire is that it effectively acts as an air shock, inflating the tire until it's as hard as a solid tire, eliminates that advantage.

Racers need it, because they need every last drop of speed, because often the difference between the winner and 4th place is a few seconds at best. Comfort is of little concern to the racer, especially when the cost of that comfort is speed.

If your riding 75km a day on tour then whether you finish the ride at 2:30PM or 3:30PM is often immaterial, so you don't need those super high pressures.


Ya 23mm tires and high pressure are not my problem. On the tour I got a nerve injury in my hand I was running 2.0" XRs at a moderate pressure. The problem was the uber stiff straight forks on my Big Dummy combined with not enough padding on the bars and a very bumpy road. I've since added more padding to the bars.

I completed a tour this summer on 3.7" tires at 15-20psi...so you don't have to worry that I'm having issues because of my racing tires!...

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