27" wheel touring bike to 700c
#1
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27" wheel touring bike to 700c
As the title says, I want to put 700c wheels on my 80's touring bike. I quickly put 700c wheels on the bike to see if the canti brakes will work and the fit isn't too good. I would like to know if there are brakes that will fit my frame to go with 700c wheels, or will any new canti brake set let me run 700c no problem? I've never used canti brakes, so maybe one of you knows how to adjust the brakes to work with 700s
Last edited by hairnet; 02-18-11 at 09:17 PM.
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To convert a bike from 27" to 700C you need 4mm of downward adjustability for your brake pads. I guess you don't have quite enough.
THere are a few manufacturers making brakes where the pads can slide quite far down the brake arm.
Here is an example. You will likely need different brake levers or a cable-travel-extender (travel agent) to make these - or any direct-pull brake - work.
THere are a few manufacturers making brakes where the pads can slide quite far down the brake arm.
Here is an example. You will likely need different brake levers or a cable-travel-extender (travel agent) to make these - or any direct-pull brake - work.
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When I changed over my 1982 Santana tandem to 700c, the old Mafac cantilever brakes wouldn't adjust down the tiny amount to the new brake track. A frustration, but I bought some new cantilever brakes and all was good. Most of the new cantilever brakes have a reasonable adjustment slot whereas some of the old ones didn't have any vertical adjustment at all.
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I have a set of Shimano BR-R550 cantis on a Surly Cross Check and they have a relatively large range of pad height adjustment and may work well on your bike. These are relatively inexpensive (~$70 for a complete front and rear set), easy to adjust and take the same slip-in pads as current V-brakes.
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Older touring bikes also had the brake bosses closer together. This in combination to the lost 4mm, make for a pretty radical angle to get the pads to hit the rim. It has been done, but sometimes you need to try out a few brake options to see what will work.
In contrast the other posters, I have had better luck finding that angle on older brakes that take non-threaded pad posts. On my Trek 620 converted to 700s, I have old Deore brakes that work okay.
jim
jim
In contrast the other posters, I have had better luck finding that angle on older brakes that take non-threaded pad posts. On my Trek 620 converted to 700s, I have old Deore brakes that work okay.
jim
jim
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Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
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SB forever