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Sorting long pull and short pull brake levers
I volunteer at a community bike shop. We have a big box of MTB brake
levers that includes long pull and short pull. We'd like to have volunteers sort them. In the past, I've used calipers to measure the distance between the lever pivot and the cable anchor, but I can't remember what the dividing line is in millimeters. (I'm working on an instruction manual and don't have any examples in front of me.) |
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Sorting long pull and short pull brake levers
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Sorting long pull and short pull brake levers
On Jan 4, 7:35*am, kolldata wrote:
? http://www.google.com/#sclient=psy&h...L+THE+DIFFEREN... well, UTUBE does't have that right up front. what you do here is sort the levers into piles x brand lever pile, y brand lever pile, 0 brand ect then take a guess at which are longs, shorts divide the piles into two areas as long short guesses then take you bike and install the guessed longs with a known correct long brake system - does it work ? and then then guessed shorts. resort according to what does not work into the other area eeyeehahahhaahaaaaa urnot working with the uh....are you ?? |
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Sorting long pull and short pull brake levers
measuring's for NASA sometimes...
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Sorting long pull and short pull brake levers
Gary Young wrote:
I volunteer at a community bike shop. We have a big box of MTB brake levers that includes long pull and short pull. We'd like to have volunteers sort them. In the past, I've used calipers to measure the distance between the lever pivot and the cable anchor, but I can't remember what the dividing line is in millimeters. (I'm working on an instruction manual and don't have any examples in front of me.) Let's get down t basics. Brake levers have had a 4:1 ratio for eons, and among those are all European brakes starting with Campagnolo. It's trivial to measure by comparing cable anchor to hand lever pivot and length from lever pivot to the crook in the hand lever for middle and index fingers. Calipers were 1:1 but not to worry, dual-pivot screwed that up too along with their higher caliper ME for nerds with weak fingers. Those folks couldn't raise the rear wheel off the road using the front brake, no matter how hard they tried. That's where bicycling has gone! -- Jobst Brandt |
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Sorting long pull and short pull brake levers
Gary Young wrote:
I volunteer at a community bike shop. We have a big box of MTB brake levers that includes long pull and short pull. We'd like to have volunteers sort them. In the past, I've used calipers to measure the distance between the lever pivot and the cable anchor, but I can't remember what the dividing line is in millimeters. (I'm working on an instruction manual and don't have any examples in front of me.) There is no hard and fast rule, between the wide range of pivot-to- anchor lengths, lever blade lengths, and adjustable ratio mechanisms. Linear-pull brake levers range around 30mm from pivot to cable button, while cantilever/caliper levers range around 20mm. For something right in between, I'd call a short lever blade unit a linear pull lever, and a long blade a caliper lever. Chalo |
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Sorting long pull and short pull brake levers
Chalo Colina wrote:
I volunteer at a community bike shop. We have a big box of MTB brake levers that includes long pull and short pull. We'd like to have volunteers sort them. In the past, I've used calipers to measure the distance between the lever pivot and the cable anchor, but I can't remember what the dividing line is in millimeters. (I'm working on an instruction manual and don't have any examples in front of me.) There is no hard and fast rule, between the wide range of pivot-to- anchor lengths, lever blade lengths, and adjustable ratio mechanisms. Linear-pull brake levers range around 30mm from pivot to cable button, while cantilever/caliper levers range around 20mm. For something right in between, I'd call a short lever blade unit a linear pull lever, and a long blade a caliper lever. I don't understand who invents pseudo-tech terms like "linear pull" for brake levers that are obviously not pulling linearly, but rather in an arc. It's the ratio that counts and no one seems to know what that is. -- Jobst Brandt |
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Sorting long pull and short pull brake levers
I know what here and its I do not have to deal with it. |
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Sorting long pull and short pull brake levers
On Jan 4, 5:48*pm, kolldata wrote:
I know what here and its I do not have to deal with it. when I ordered brakes ( 2 different brands brakes) and levers for the 29er chalo conned me into building, I prayed for an hour or two. That was effective. |
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Sorting long pull and short pull brake levers
On Jan 4, 3:05*pm, wrote:
Chalo Colina wrote: I volunteer at a community bike shop. *We have a big box of MTB brake levers that includes long pull and short pull. *We'd like to have volunteers sort them. *In the past, I've used calipers to measure the distance between the lever pivot and the cable anchor, but I can't remember what the dividing line is in millimeters. (I'm working on an instruction manual and don't have any examples in front of me.) There is no hard and fast rule, between the wide range of pivot-to- anchor lengths, lever blade lengths, and adjustable ratio mechanisms. Linear-pull brake levers range around 30mm from pivot to cable button, while cantilever/caliper levers range around 20mm. *For something right in between, I'd call a short lever blade unit a linear pull lever, and a long blade a caliper lever. I don't understand who invents pseudo-tech terms like "linear pull" for brake levers that are obviously not pulling linearly, but rather in an arc. *It's the ratio that counts and no one seems to know what that is. -- Jobst Brandt direct pull - a better name than linear pull - is roughly twice as much mechanical advantage. the hand levers are adjusted to half the typical mechanical advantage to compensate. as usual sheldon has it well explained: http://www.sheldonbrown.com/canti-direct.html |
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