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Two front brakes
I saw a bike today that had two front brakes operated from the same lever.
The lever had two cabels comming from a plate just in front of the brake lever. One pulled a cantilever brake, the other a hub drum (roller?) brake. Has anyone else seen this setup, as is there any good reason for it? Martin. |
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#2
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Two front brakes
Martin Dann wrote: I saw a bike today that had two front brakes operated from the same lever. The lever had two cabels comming from a plate just in front of the brake lever. One pulled a cantilever brake, the other a hub drum (roller?) brake. Has anyone else seen this setup, as is there any good reason for it? Martin. was it a trike? one of the giffers in our club has one on his; two callipers on the front; one operated by each lever |
#3
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Two front brakes
"MartinM" wrote in message oups.com... Martin Dann wrote: I saw a bike today that had two front brakes operated from the same lever. The lever had two cables comming from a plate just in front of the brake lever. One pulled a cantilever brake, the other a hub drum (roller?) brake. Has anyone else seen this setup, as is there any good reason for it? Martin. was it a trike? one of the giffers in our club has one on his; two callipers on the front; one operated by each lever No definately a bike. One lever pulled both. As I see it, they would have to very well, and regularly adjusted to make both brakes operate at the same time. Otherwise only one would brake, and the other do nothing Martin |
#4
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Two front brakes
In article , Martin Dann wrote:
I saw a bike today that had two front brakes operated from the same lever. The lever had two cables comming from a plate just in front of the brake lever. One pulled a cantilever brake, the other a hub drum (roller?) brake. [..] No definately a bike. One lever pulled both. As I see it, they would have to very well, and regularly adjusted to make both brakes operate at the same time. Otherwise only one would brake, and the other do nothing You could set up the linkage so that once one brake hit the wheel, further movement of the handle takes up slack in the other before applying significant force to the first. But in that case if one cable breaks, the other does nothing. I suppose it means you can brake for twice as long before overheating of rim or hub is a problem. (There was a quad on eBay a while back where both wheels had both rim and hub brakes, but both captain and third stoker had two levers.) On the other hand, if it is to provide two brakes for backup (for someone with no strength in one hand?), then it doesn't matter if one brake does nothing normally, so long as it works if the first one fails. |
#5
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Two front brakes
Martin Dann wrote: I saw a bike today that had two front brakes operated from the same lever. The lever had two cables comming from a plate just in front of the brake lever. One pulled a cantilever brake, the other a hub drum (roller?) brake. Has anyone else seen this setup, as is there any good reason for it? Martin. As I was collecting the Brompton from its service the other day, another customer was collecting his bike that the shop had just built up. It seems that the customer had lost a lot of the strength in one arm and hand, so the shop had set up both brakes on a single lever (from a tricycle?), and a mixture of a thumb lever for the front changer and a twist grip for the rear. The customer had a five-mile shake-down ride home. |
#6
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Two front brakes
Martin Dann wrote: I saw a bike today that had two front brakes operated from the same lever. The lever had two cabels comming from a plate just in front of the brake lever. One pulled a cantilever brake, the other a hub drum (roller?) brake. Has anyone else seen this setup, as is there any good reason for it? Martin. In the UK, bikes are required by law to have two functioning brakes. If you only have one functioning hand you will need a different arrangement. A fixed wheel counts as one brake, backwards pedalling coaster brakes do not (I'm not certain why). If you don't like fixed wheels the double activation is essential. Dia Compe make levers to activate two brakes. My tandem used to have front and back activated from the right lever and the drag brake from the left. I now have a more conventional set up, although the drag brake is activated using a gripshift instead. regards, d. |
#7
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Two front brakes
Martin Dann wrote:
"MartinM" wrote in message oups.com... Martin Dann wrote: I saw a bike today that had two front brakes operated from the same lever. The lever had two cables comming from a plate just in front of the brake lever. One pulled a cantilever brake, the other a hub drum (roller?) brake. Has anyone else seen this setup, as is there any good reason for it? Martin. was it a trike? one of the giffers in our club has one on his; two callipers on the front; one operated by each lever No definately a bike. One lever pulled both. As I see it, they would have to very well, and regularly adjusted to make both brakes operate at the same time. Otherwise only one would brake, and the other do nothing It's a self adjusting system. The brake that does all the work wears its pads down until both brakes are wearing down at the same rate. -- Chris Malcolm DoD #205 IPAB, Informatics, JCMB, King's Buildings, Edinburgh, EH9 3JZ, UK [http://www.dai.ed.ac.uk/homes/cam/] |
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