27" wheel touring bike to 700c
02-18-11, 09:07 PM
#1
Fresh Garbage
Thread Starter
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.
02-18-11, 10:23 PM
#2
Guest
Join Date: Jul 2008
Location: Grid Reference, SK
Posts: 3,768
Bikes: I never learned to ride a bike. It is my deepest shame.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Likes: 0
Liked 6 Times
in
6 Posts
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.
02-19-11, 06:26 AM
#3
Palmer
Join Date: Mar 2007
Location: Parts Unknown
Posts: 8,624
Bikes: Mike Melton custom, Alex Moulton AM, Dahon Curl
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 1666 Post(s)
Liked 1,819 Times
in
1,058 Posts
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.
02-19-11, 07:49 AM
#4
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
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.
02-19-11, 10:28 AM
#5
afraid of whales
Join Date: Apr 2009
Location: Front Range, CO
Posts: 4,306
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 347 Post(s)
Likes: 0
Liked 5 Times
in
5 Posts
OP, can you post a picture of your brake with the 700C wheel installed? It's rare that canti can't move 4mm.
02-19-11, 02:02 PM
#6
surly old man
Join Date: Sep 2006
Location: Carlisle, PA
Posts: 3,392
Bikes: IRO Mark V, Karate Monkey half fat, Trek 620 IGH, Cannondale 26/24 MTB, Amp Research B3, and more.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 46 Post(s)
Likes: 0
Liked 42 Times
in
18 Posts
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
__________________
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...
--------------------------
SB forever
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...
--------------------------
SB forever
Thread
Thread Starter
Forum
Replies
Last Post
atombianchi
Bicycle Mechanics
9
06-16-10 07:41 PM
