Comments on: Adjusting BB7 Brakes on Trikes http://bicyclepatents.com/adjusting-bb7-brakes-on-trikes/1241/ Wed, 04 Apr 2012 22:14:26 +0000 hourly 1 http://wordpress.org/?v= By: Bruce Bunch (trikebldr) http://bicyclepatents.com/adjusting-bb7-brakes-on-trikes/1241/comment-page-1/#comment-56623 Bruce Bunch (trikebldr) Thu, 29 Dec 2011 08:22:33 +0000 http://bicyclepatents.com/?p=1241#comment-56623 Andy, all of what you say is true on bikes, but we are talking about trikes here. Trikes are a special, compromised application of these brakes. On a trike, one brake is actually being used backwards! (but, is equally effective as forward!) Also, the way these brakes have to be mounted, as the trike is loaded, one brake has the rotor moving closer to the outer (fixed) pad while the opposite side has the rotor moving toward the inner (moving) pad. Trikes have the front wheels mounted in a single-hung fashion, whereas a bike has them mounted in a double-hung fashion. The whole reason for this instruction was to optimize the alignment taking into account all flexing of the single-hung arrangement under full loading of the trike. Bikes don't see this condition at all. So, techniques for adjusting these brakes on bikes have no relevance to trikes! Andy, all of what you say is true on bikes, but we are talking about trikes here. Trikes are a special, compromised application of these brakes.
On a trike, one brake is actually being used backwards! (but, is equally effective as forward!)
Also, the way these brakes have to be mounted, as the trike is loaded, one brake has the rotor moving closer to the outer (fixed) pad while the opposite side has the rotor moving toward the inner (moving) pad.
Trikes have the front wheels mounted in a single-hung fashion, whereas a bike has them mounted in a double-hung fashion. The whole reason for this instruction was to optimize the alignment taking into account all flexing of the single-hung arrangement under full loading of the trike.
Bikes don’t see this condition at all. So, techniques for adjusting these brakes on bikes have no relevance to trikes!

]]> By: arallsopp http://bicyclepatents.com/adjusting-bb7-brakes-on-trikes/1241/comment-page-1/#comment-56291 arallsopp Sun, 25 Dec 2011 12:21:53 +0000 http://bicyclepatents.com/?p=1241#comment-56291 I'd understood the 1/3 2/3 positioning as optimising wear patterns on single side actuated callipers such as the bb7. As the inboard pad doesn't move under braking, the tendency is for the rotor to be bent across by the outboard pad until it makes contact. This causes it to sit off 90 degrees and accelerates rotor warp and pad wear. Moving the inboard pad closer compensates for this effect, and pads and rotors last longer. That's my findings anyway. :) Andy. I’d understood the 1/3 2/3 positioning as optimising wear patterns on single side actuated callipers such as the bb7. As the inboard pad doesn’t move under braking, the tendency is for the rotor to be bent across by the outboard pad until it makes contact. This causes it to sit off 90 degrees and accelerates rotor warp and pad wear. Moving the inboard pad closer compensates for this effect, and pads and rotors last longer.

That’s my findings anyway. :)

Andy.

]]> By: Brad http://bicyclepatents.com/adjusting-bb7-brakes-on-trikes/1241/comment-page-1/#comment-820 Brad Tue, 16 Jun 2009 18:57:31 +0000 http://bicyclepatents.com/?p=1241#comment-820 Thanks for the info. I was able tro sit on the trike and loosen and then tighten the calipers bolts. The brakes work better I feel and I did not have an extra wrench person and my dtr is not nearly as heavy as me. But I was able to the bolts fine, esp on the side where they are to the top. Thanks for the info. I was able tro sit on the trike and loosen and then tighten the calipers bolts. The brakes work better I feel and I did not have an extra wrench person and my dtr is not nearly as heavy as me. But I was able to the bolts fine, esp on the side where they are to the top.

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