Has anyone heard of head tube issues on the most recent generation of TR11s? A buddy of mine just dented his second frame in 2 months...
Has anyone heard of head tube issues on the most recent generation of TR11s? A buddy of mine just dented his second frame in 2 months behind the headtube from the fork bumpers.
Those ODI bumpers will dent/crack most frames in a crash
Ouch! I was recently following a different thread with people discussing using double crown forks on more enduro level bikes, some of which were not rated for that use. Is there any consensus on what the best bumper setup is to prevent frame damage? It would seem like it would somewhat depend on the frame contours and wall thickness, but even if we put that aside, I sort of go back and forth puzzling it out in my head as far as the optimal durometer and shape of the bumpers. For example, thicker will potentially have more cush, but strike the frame more often. Softer will provide more compliance and gradual ramp up, but might bottom out and spike the loads to the frame. Etc...
Has anyone heard of head tube issues on the most recent generation of TR11s? A buddy of mine just dented his second frame in 2 months...
Has anyone heard of head tube issues on the most recent generation of TR11s? A buddy of mine just dented his second frame in 2 months behind the headtube from the fork bumpers.
Ouch! I was recently following a different thread with people discussing using double crown forks on more enduro level bikes, some of which were not rated...
Ouch! I was recently following a different thread with people discussing using double crown forks on more enduro level bikes, some of which were not rated for that use. Is there any consensus on what the best bumper setup is to prevent frame damage? It would seem like it would somewhat depend on the frame contours and wall thickness, but even if we put that aside, I sort of go back and forth puzzling it out in my head as far as the optimal durometer and shape of the bumpers. For example, thicker will potentially have more cush, but strike the frame more often. Softer will provide more compliance and gradual ramp up, but might bottom out and spike the loads to the frame. Etc...
After some armchair engineering, I think ideally it would be moulded and adhered to the frame itself and sized so that it makes as much contact with the fork as possible, at which point you could relax on the thickness and hardness a bit. It could be a lot of work on more complex frame shapes, but you could also get contact with more than 100 mm of the stanchion on some frames.
Or use a knockblock style headset? The headtube is stronger than the downtube and top tube and can also reroute the loads to the two tubes over a larger surface area than bumpers can... Or a steering damper, it should prevent fast movements and thus high speed impacts.
Contoured bumpers will also have a different stiffness characteristic over the height of the frame so might be semi effective. Thick, somewhat soft bumpers should be the best, but will impact the steering angle.
Ouch! I was recently following a different thread with people discussing using double crown forks on more enduro level bikes, some of which were not rated for that use. Is there any consensus on what the best bumper setup is to prevent frame damage? It would seem like it would somewhat depend on the frame contours and wall thickness, but even if we put that aside, I sort of go back and forth puzzling it out in my head as far as the optimal durometer and shape of the bumpers. For example, thicker will potentially have more cush, but strike the frame more often. Softer will provide more compliance and gradual ramp up, but might bottom out and spike the loads to the frame. Etc...
After some armchair engineering, I think ideally it would be moulded and adhered to the frame itself and sized so that it makes as much contact with the fork as possible, at which point you could relax on the thickness and hardness a bit. It could be a lot of work on more complex frame shapes, but you could also get contact with more than 100 mm of the stanchion on some frames.
Or use a knockblock style headset? The headtube is stronger than the downtube and top tube and can also reroute the loads to the two tubes over a larger surface area than bumpers can... Or a steering damper, it should prevent fast movements and thus high speed impacts.
Contoured bumpers will also have a different stiffness characteristic over the height of the frame so might be semi effective. Thick, somewhat soft bumpers should be the best, but will impact the steering angle.
Thought everyone just put some electrical tape in the right area and just wedge the standard fox ones on the tape....
Has worked perfectly for me
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