Brake spacing for replacing 700c wheels --> 26in
09-22-10, 11:06 AM
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Brake spacing for replacing 700c wheels --> 26in
I've been thinking of frankenbiking on my frames to use 26in wheels. It was originally made for 700c with a high BB. What are the odds I could mount a U-brake on the canti studs and have enough range of motion for 26in (559 erto) rims?
09-22-10, 12:21 PM
#4
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I would advise against this project unless you opt for drum brakes as fietsbob suggests. That said, I wouldn't bet against a man hell-bent on doing anything. My prediction, however, is that the result wouldn't be satisfactory.
09-22-10, 02:58 PM
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You might be able to use the cantilever mounts for u-brakes, or roller cams, but I have no guarantees it would work, and you still have the problem of dramatically altered frame geometry.
09-22-10, 03:47 PM
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go old school and just brake with your foot. golden.
09-22-10, 04:08 PM
#8
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Someone in another post had a link to a special horseshoe shaped bracket with posts that mounts onto the old post location and the lower posts on the horseshoe adapter are then in the right spot for 26 inch wheels as I recall. No idea of who or where, sorry.
You'd better be sure that the frame DOES have a really high BB location because unless you're using fat 26 inch tires that reduce the final height reduction pedal strikes in the turns will become a very real possibility.
You'd better be sure that the frame DOES have a really high BB location because unless you're using fat 26 inch tires that reduce the final height reduction pedal strikes in the turns will become a very real possibility.
09-22-10, 04:20 PM
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Someone in another post had a link to a special horseshoe shaped bracket with posts that mounts onto the old post location and the lower posts on the horseshoe adapter are then in the right spot for 26 inch wheels as I recall. No idea of who or where, sorry.
You'd better be sure that the frame DOES have a really high BB location because unless you're using fat 26 inch tires that reduce the final height reduction pedal strikes in the turns will become a very real possibility.
You'd better be sure that the frame DOES have a really high BB location because unless you're using fat 26 inch tires that reduce the final height reduction pedal strikes in the turns will become a very real possibility.
for U-brakes, the stud would have to be around 30 to 50mm above the rim.
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
09-22-10, 08:33 PM
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I wonder if you could use those mavic adapters in reverse.
09-23-10, 06:55 AM
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An ISO 60-559 (a.k.a. 26") mounted and inflated tire has almost exactly the same outer diameter as an ISO 23-622 (a.k.a. 700C) tire - which is also almost identical in OD to an ISO 35-590.
There are bike models like the Cannondale Bad Boys with their disc brakes and high clearance frames that are designed to take advantage of this.
Of course, you can lower your BB by switching from ISO 38-622 (700C) to ISO 20-622 (700C).
tcs
Last edited by tcs; 09-23-10 at 06:59 AM.
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