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#1
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Backwards front brake?
"renormalize" wrote in message om... Front side-pull brakes on SWB recumbents can interfere with the chain path. On a bike equipped with road calipers, one might naively think this could be solved simply by flipping the brake around and mounting it behind the fork. (After all, the rear brake on a road bike is mounted "backwards"!) But, to quote from an old Cyclo-Pedia catalog, this could be dangerous: "My first thought was to mount the brake to the back side of the front fork, but I realized that if I applied the front brake very hard the wheel might be pulled from the front fork dropouts by the braking action. The front brake must be mounted on the front of the front fork." But how likely is this? Does moving the braking "grab point" back on the rim a mere 3 or so inches really alter the various braking torques enough to lead to dropout disaster? So my real question is: how much risk do I take by reverse-mounting my front brake to improve cable routing? Ron No risk at all for caliper brakes, at least of the wheel pulling out. You could have problems with the brake fouling the down tube if the bars get turned right round, but this isn't likely to happen whilst riding. It is possible for disk brakes to pull the front wheel out, as the normal mount position is the equivalent of reverse mounting, but much further round the wheel. Lawyer lips normally prevent this, although the movement of the axle as the wheel is pulled against the lips, and then pushed back, can cause the QR adjuster to loosen. Alternatively the brake could be more safely mounted on the front of the RH fork leg. |
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#2
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Backwards front brake?
"renormalize" wrote in message om... Front side-pull brakes on SWB recumbents can interfere with the chain path. On a bike equipped with road calipers, one might naively think this could be solved simply by flipping the brake around and mounting it behind the fork. (After all, the rear brake on a road bike is mounted "backwards"!) But, to quote from an old Cyclo-Pedia catalog, this could be dangerous: "My first thought was to mount the brake to the back side of the front fork, but I realized that if I applied the front brake very hard the wheel might be pulled from the front fork dropouts by the braking action. The front brake must be mounted on the front of the front fork." But how likely is this? Does moving the braking "grab point" back on the rim a mere 3 or so inches really alter the various braking torques enough to lead to dropout disaster? So my real question is: how much risk do I take by reverse-mounting my front brake to improve cable routing? Ron No risk at all for caliper brakes, at least of the wheel pulling out. You could have problems with the brake fouling the down tube if the bars get turned right round, but this isn't likely to happen whilst riding. It is possible for disk brakes to pull the front wheel out, as the normal mount position is the equivalent of reverse mounting, but much further round the wheel. Lawyer lips normally prevent this, although the movement of the axle as the wheel is pulled against the lips, and then pushed back, can cause the QR adjuster to loosen. Alternatively the brake could be more safely mounted on the front of the RH fork leg. |
#3
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Backwards front brake?
On a rim brake? Hardly. I've seen tandems with dual calipers (one in
front, one behind) a very beefy looking fork. The issue of wheel expulsion is in regards to DISC brakes, which put the brake pads almost directly behind the dropout. ASA rim brakes are concerned, three inches further back would not do this. The brake/rim interface would still be above the dropout. - - "May you have the wind at your back. And a really low gear for the hills!" Chris Zacho ~ "Your Friendly Neighborhood Wheelman" Chris'Z Corner http://www.geocities.com/czcorner |
#4
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Backwards front brake?
On a rim brake? Hardly. I've seen tandems with dual calipers (one in
front, one behind) a very beefy looking fork. The issue of wheel expulsion is in regards to DISC brakes, which put the brake pads almost directly behind the dropout. ASA rim brakes are concerned, three inches further back would not do this. The brake/rim interface would still be above the dropout. - - "May you have the wind at your back. And a really low gear for the hills!" Chris Zacho ~ "Your Friendly Neighborhood Wheelman" Chris'Z Corner http://www.geocities.com/czcorner |
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