new brakes on an old frame?
08-06-06 | 07:31 PM
#1
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Joined: Oct 2005
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From: Salem, MA
Bikes: Land Shark, Level Professional, Tsunami singlespeed, Giant Reign 1
new brakes on an old frame?
for you folks that have converted old frames -
i have an 84 schwinn world that doesn't accomodate recessed bolts. i ended up picking up some used calipers, cleaned them up and lubed them, and they're ok. i was wondering if it was generally possible to bolt on newer brakes (without drop bolts, because they seem to have dissappeared).
i have an 84 schwinn world that doesn't accomodate recessed bolts. i ended up picking up some used calipers, cleaned them up and lubed them, and they're ok. i was wondering if it was generally possible to bolt on newer brakes (without drop bolts, because they seem to have dissappeared).
08-06-06 | 08:00 PM
#3
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Joined: Jul 2006
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if i understand waht your saying correctly..you are having the same problem i had over this last weekend. i have a 1987 bianchi that has nutted brakes, but i ended up buying a new caliper that was taken off of a brand new cervelo at the local lbs where i picked it up. this is the problem right??
what you have to do, and what i did, is buy a 20-22mm recessed nut from the lbs and drill with a 5/16" drill bit a hole in the back of the frame...
check this out..
taken from sheldonbrown.com https://www.sheldonbrown.com/gloss_ra-e.html
what you have to do, and what i did, is buy a 20-22mm recessed nut from the lbs and drill with a 5/16" drill bit a hole in the back of the frame...
check this out..
Mounting recessed calipers on older frames
Rear: Front calipers for recessed mounting have bolts that are long enough to mount in back, if you substitute the appropriate washers and a 6 mm nut.
Front: Here are 3 options:
1. Drill out the back of the fork crown (8 mm or 5/16 drill bit). This is actually quite easy to do with a handheld electric drill, since you're only enlarging an existing hole.
That's it if you can get two front calipers. Sometimes, you may have to deal with a pair of brakes, with one long and one short bolt. If you used the long one in back, you can use the short one in front two different ways:
2. Drill out the back of the fork crown and use an extra-long recessed nut. These nuts are commonly available for use in carbon fiber forks.
3. Use the short recessed nut, but don't put it through the back of the fork. Instead, push it up into the inside of the steerer from the bottom. You can reach a 5 mm Allen wrench in through the hole in the back of the fork, and poke the short caliper bolt in from the front.
You may need to shorten the recessed nut slightly to get it to fit inside your steerer.
Rear: Front calipers for recessed mounting have bolts that are long enough to mount in back, if you substitute the appropriate washers and a 6 mm nut.
Front: Here are 3 options:
1. Drill out the back of the fork crown (8 mm or 5/16 drill bit). This is actually quite easy to do with a handheld electric drill, since you're only enlarging an existing hole.
That's it if you can get two front calipers. Sometimes, you may have to deal with a pair of brakes, with one long and one short bolt. If you used the long one in back, you can use the short one in front two different ways:
2. Drill out the back of the fork crown and use an extra-long recessed nut. These nuts are commonly available for use in carbon fiber forks.
3. Use the short recessed nut, but don't put it through the back of the fork. Instead, push it up into the inside of the steerer from the bottom. You can reach a 5 mm Allen wrench in through the hole in the back of the fork, and poke the short caliper bolt in from the front.
You may need to shorten the recessed nut slightly to get it to fit inside your steerer.
