problem fitting brake calipers
05-07-14 | 07:12 PM
#1
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Joined: May 2008
Posts: 957
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From: Toronto, Canada
Bikes: (shortlist) Cyclops, Marinoni, Mariposa, Air Firday, Pocket Rocket Pro, NWT, SLX Fuso, Claude Pottie (France) x3, Masi Team 3v, Lemond Zurich, Bianchi OS
problem fitting brake calipers
OK, this is about my first foray into (relatively) modern bike builds.
I am trying to rebuild a very nice Pinarello Prince (aluminum main frame, carbon stays and fork) with 9S 25th anniversary Dura Ace.
I am stumped on the brake calipers.
the rear brake mount measures 35mm.
the front brake mount measures 47mm.
The brake calipers, as they are, do not fit these mounts. I can fit one, on either the front or the rear (thanks to the one long bolt I have), but no combination of brake post and bolt fits the other.
is there a special longer brake bolt for these fat carbon forks, like the singleton I have in the picture?
Peter
I am trying to rebuild a very nice Pinarello Prince (aluminum main frame, carbon stays and fork) with 9S 25th anniversary Dura Ace.
I am stumped on the brake calipers.
the rear brake mount measures 35mm.
the front brake mount measures 47mm.
The brake calipers, as they are, do not fit these mounts. I can fit one, on either the front or the rear (thanks to the one long bolt I have), but no combination of brake post and bolt fits the other.
is there a special longer brake bolt for these fat carbon forks, like the singleton I have in the picture?
Peter
05-07-14 | 07:46 PM
#2
Senior Member
Joined: Apr 2009
Posts: 39,897
Likes: 3,865
From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Brake bolts (the part of the caliper) are fairly standard in length, with the shorter one for the rear. You make up the difference with the nuts which come in a variety of lengths.
Based on the nut you now have for the front, see how much more or less you need, and buy the right bolt. If not sure, longer is better than too short because it's easily fixed with a saw or file.
Based on the nut you now have for the front, see how much more or less you need, and buy the right bolt. If not sure, longer is better than too short because it's easily fixed with a saw or file.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
05-07-14 | 07:48 PM
#3
Senior Member
Joined: Apr 2009
Posts: 39,897
Likes: 3,865
From: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Brake bolts (the part of the caliper) are fairly standard in length, with the shorter one for the rear. You make up the difference with the nuts which come in a variety of lengths.
Based on the nut you now have for the front, see how much more or less you need, and buy the right bolt. If not sure, longer is better than too short because it's easily fixed with a saw or file.
BTW- the right front nut is usualy about 1cm shorter than the thickness of the fork.
Based on the nut you now have for the front, see how much more or less you need, and buy the right bolt. If not sure, longer is better than too short because it's easily fixed with a saw or file.
BTW- the right front nut is usualy about 1cm shorter than the thickness of the fork.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.
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