Rim Brakes - Barrel Adjusters - Different Rim Widths
01-06-24, 04:27 AM
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Rim Brakes - Barrel Adjusters - Different Rim Widths
I’m planning to use Tektro R559 on an all-road bike that can take up to 42mm tires. I want to use two wheelsets, one has a 20.8 external width and the other is 23 external. When I swap wheels, can I assume the barrel adjusters should allow for 2.2mm adjustment, or is that too much?
01-06-24, 05:53 AM
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I'm not sure, but it sure seems like 2.2mm is within compensating for pad wear or a wobbly wheel. I don't expect that you'll have any problems, except if the bigger wheel is also wobbly.
01-06-24, 06:00 AM
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Looks like those have a release lever, so that might be enough that you won't have to use the barrel adjuster much ( which would be a pain in the ass IMO).
Using the release lever to accommodate the two sizes you might need to partially deflate the tires on the wide rims for install/uninstall.
Using the release lever to accommodate the two sizes you might need to partially deflate the tires on the wide rims for install/uninstall.
01-06-24, 07:49 AM
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While I do think that the barrel adjuster may be able to take up the extra width, it is likely that the pads will contact the rim in a different place. Set up correctly for 23mm external may have pads rubbing the tire even with cable pull adjusted for the 20.8mm external.
Either way, you probably need to use a tool to adjust correctly when switching between the two wheelsets.
Either way, you probably need to use a tool to adjust correctly when switching between the two wheelsets.
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01-06-24, 07:50 AM
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While I do think that the barrel adjuster may be able to take up the extra width, it is likely that the pads will contact the rim in a different place. Set up correctly for 23mm external may have pads rubbing the tire even with cable pull adjusted for the 20.8mm external.
01-06-24, 09:55 AM
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Don't overthink this. You should find no issues swapping these wheels, since the rim diameters are the same.
You might even find that no brake adjustment is needed, with the difference being within the lever's working range, and your hands automatically adapting.
In any case, IF any issues do arise, they'll be minor and easily solved.
You might even find that no brake adjustment is needed, with the difference being within the lever's working range, and your hands automatically adapting.
In any case, IF any issues do arise, they'll be minor and easily solved.
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01-06-24, 10:30 AM
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The Tektro R559 brakes are really good, maybe the best rim brakes ever. I have them on the Dinucci and they work great.
I think if you set up the cable so that it fits your "wide" rims with the adjuster screwed all the way "in" you'll find that you have enough take up in the adjuster to work well with the narrow rims.
Do confirm that the pads are in proper contact with the rim on both wheels - this should be achievable as the arms are pretty long on these brakes.
I'm with FBinNY don't over-think this
/markp
I think if you set up the cable so that it fits your "wide" rims with the adjuster screwed all the way "in" you'll find that you have enough take up in the adjuster to work well with the narrow rims.
Do confirm that the pads are in proper contact with the rim on both wheels - this should be achievable as the arms are pretty long on these brakes.
I'm with FBinNY don't over-think this
/markp
