Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

Need some brake advice.

Search
Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

Need some brake advice.

Thread Tools
 
Search this Thread
 
Old 10-09-20 | 03:36 PM
  #1  
robertj298's Avatar
Thread Starter
Senior Member
Titanium Club Membership
5 Anniversary
 
Joined: Jun 2018
Posts: 1,168
Likes: 516
From: NW Ohio

Bikes: 1983 Univega Super Strada, 1986 Panasonic DX5000, 1984 Fuji Team 85 Univega Gran Turismo, 1984 Lotus Unique, 1987 Centurion Expert, 1987 Centurion Ironman Master,

Need some brake advice.

My 1983 Univega Super Strada is my perfect bike. I swapped the Dura Ace AX rear derailleur with
a first generation Suntour Superbe which works great. My problem is with the Dia Compe Aero
Gran Compe brakes.The front pads are decent but the rear pads aren't. I don't ride fast and never need to
stop all that fast but I am going to need some new brakes soon.I know replacement pads are almost
impossible to get so I'm wondering if I should get all new calipers which would be easier to find pads
for and if there would be calipers where I wouldn't have to replace the brake levers? Here are the brakes that are on it.
robertj298 is offline  
Reply
Old 10-09-20 | 03:50 PM
  #2  
noobinsf's Avatar
Senior Member
20 Anniversary
 
Joined: Sep 2005
Posts: 3,487
Likes: 1,553
From: Oakland, CA

Bikes: '82 Univega Competizione, '72 Motobecane Grand Record, '83 Mercian KOM Touring, '85 Univega Alpina Uno, '76 Eisentraut Limited

Shoot, someone posted a workaround to replace the brake shoes, since you need something with an internally threaded post, but I am having trouble finding the thread. Truth be told, you're probably better off replacing the calipers with something better. These brakes came stock on my Competizione, but I upgraded to Shimano 105 brake calipers and have no regrets -- the stopping is much better.
noobinsf is offline  
Reply
Old 10-09-20 | 04:16 PM
  #3  
robertj298's Avatar
Thread Starter
Senior Member
Titanium Club Membership
5 Anniversary
 
Joined: Jun 2018
Posts: 1,168
Likes: 516
From: NW Ohio

Bikes: 1983 Univega Super Strada, 1986 Panasonic DX5000, 1984 Fuji Team 85 Univega Gran Turismo, 1984 Lotus Unique, 1987 Centurion Expert, 1987 Centurion Ironman Master,

Originally Posted by noobinsf
Shoot, someone posted a workaround to replace the brake shoes, since you need something with an internally threaded post, but I am having trouble finding the thread. Truth be told, you're probably better off replacing the calipers with something better. These brakes came stock on my Competizione, but I upgraded to Shimano 105 brake calipers and have no regrets -- the stopping is much better.
Did you replace just the calipers?
robertj298 is offline  
Reply
Old 10-09-20 | 04:46 PM
  #4  
noobinsf's Avatar
Senior Member
20 Anniversary
 
Joined: Sep 2005
Posts: 3,487
Likes: 1,553
From: Oakland, CA

Bikes: '82 Univega Competizione, '72 Motobecane Grand Record, '83 Mercian KOM Touring, '85 Univega Alpina Uno, '76 Eisentraut Limited

Originally Posted by robertj298
Did you replace just the calipers?
Mine came without a cockpit, so I got some Tektro R341 levers. However, I don’t think there’s any reason you can’t use the AGC levers with any other comparable calipers. There’s nothing weird or unique about the levers as far as I know.
noobinsf is offline  
Reply
Old 10-09-20 | 06:10 PM
  #5  
SurferRosa's Avatar
señor miembro
Community Builder
 
Joined: Dec 2018
Posts: 3,532
Likes: 8,936
From: Pac NW

Bikes: '70s - '80s Campagnolo

Originally Posted by noobinsf
I don’t think there’s any reason you can’t use the AGC levers with any other comparable calipers.
What would be a unique feature of a brake lever that would limit you to certain calipers? The only thing I can think of is if they're normally routed aero levers (left lever is the front), you will want the caliper's cable entry on the opposite side.

Going the other way (given a set of calipers and choosing new levers), I can understand a caliper without a quick release might force some folks to choose levers with one built in.
SurferRosa is offline  
Reply
Old 10-09-20 | 06:14 PM
  #6  
noobinsf's Avatar
Senior Member
20 Anniversary
 
Joined: Sep 2005
Posts: 3,487
Likes: 1,553
From: Oakland, CA

Bikes: '82 Univega Competizione, '72 Motobecane Grand Record, '83 Mercian KOM Touring, '85 Univega Alpina Uno, '76 Eisentraut Limited

Originally Posted by SurferRosa
What would be a unique feature of a brake lever that would limit you to certain calipers? The only thing I can think of is if they're normally routed aero levers (left lever is the front), you will want the caliper's cable entry on the opposite side.

Going the other way (given a set of calipers and choosing new levers), I can understand a caliper without a quick release might force some folks to choose levers with one built in.
Yeah, that's kind of my point. Aside from the good example you cite of a quick-release vs. non-QR, I think a lever is a lever is a lever, right? (There is also v-brake vs. canti or caliper, but there is no chance the OP would use v-brakes with the AGC levers, so it's hardly worth mentioning in this case.)
noobinsf is offline  
Reply
Old 10-09-20 | 06:24 PM
  #7  
Senior Member
20 Anniversary
 
Joined: Oct 2005
Posts: 1,914
Likes: 449
From: Upper Left, USA
Originally Posted by noobinsf
Yeah, that's kind of my point. Aside from the good example you cite of a quick-release vs. non-QR, I think a lever is a lever is a lever, right? (There is also v-brake vs. canti or caliper, but there is no chance the OP would use v-brakes with the AGC levers, so it's hardly worth mentioning in this case.)
I've heard folks around here make claims about some levers working better or worse than other levers when combines with certain calipers. Maybe cable pull is different for different levers? Shimano claims their SLR brakes work best with their SLR levers, but hard to believe big bike companies with claims like that.
tricky is offline  
Reply
Old 10-09-20 | 06:25 PM
  #8  
clubman's Avatar
Phyllo-buster
Titanium Club Membership
15 Anniversary
 
Joined: Jan 2010
Posts: 9,278
Likes: 2,700
From: Nova Scotia

Bikes: roadsters, club bikes, fixed and classic

The less radical Dia-compe Royal Compe II's are a beautiful alternative to the AGC's and are quite available. And they work very well with standard brake pads/holders.
Silver, white and black finishes.


Last edited by clubman; 10-09-20 at 06:29 PM.
clubman is offline  
Reply
Old 10-09-20 | 06:32 PM
  #9  
clubman's Avatar
Phyllo-buster
Titanium Club Membership
15 Anniversary
 
Joined: Jan 2010
Posts: 9,278
Likes: 2,700
From: Nova Scotia

Bikes: roadsters, club bikes, fixed and classic

Originally Posted by tricky
I've heard folks around here make claims about some levers working better or worse than other levers when combines with certain calipers. Maybe cable pull is different for different levers? Shimano claims their SLR brakes work best with their SLR levers, but hard to believe big bike companies with claims like that.
You'd think so but the 105 SLR single pivot calipers with matching levers were (could be) just awesome. No return springs in the levers either.

Last edited by clubman; 10-09-20 at 07:17 PM.
clubman is offline  
Reply
Old 10-09-20 | 06:50 PM
  #10  
Senior Member
 
Joined: Oct 2015
Posts: 6,280
Likes: 612
From: Los Angeles

Bikes: 78 Masi Criterium, 68 PX10, 2016 Mercian King of Mercia, Rivendell Clem Smith Jr

Yeah, but the regular gran compes aren't AERO!

If you were really determined, and have oodles of mechanical skills, I bet you could modify a new pad to fit those holders, and figure out a way to glue them in. I would probably try, just for the challenge. They did it at the factory, so it must be possible, right?

Unless you're really confident with stuff like that, I'd frankly give up. The only 'easy' solution I can recall offhand it is to replace the pad holders with the similar pad holders from Modolo, but those are just as rare nowadays. I think someone here did it, but even that took some mods.


Can't go wrong with regular Gran Compe or Superbe. Make sure to get short reach. I personally like the Bridgestone self centering brakes, which are pretty much the blue collar version of AGCs, and they take normal pads. (both are made by dia compe) A little metal polish will spruce them up to fancy. If you hot rod them with modern 'dura' pads and holders, they'll look just as aero as AGC. Usually easy to find since they were OEM on many 80s Bridgestones.



Last edited by Salamandrine; 10-09-20 at 06:53 PM.
Salamandrine is offline  
Reply
Old 10-09-20 | 06:57 PM
  #11  
brian3069's Avatar
Senior Member
Titanium Club Membership
15 Anniversary
 
Joined: Jun 2009
Posts: 1,747
Likes: 211

Bikes: Raleigh Supercourse

Wonder if these pads would work.

https://www.performancebike.com/shim...hoCSYEQAvD_BwE
brian3069 is offline  
Reply
Old 10-09-20 | 08:31 PM
  #12  
Senior Member
20 Anniversary
 
Joined: Jul 2004
Posts: 8,162
Likes: 647
From: Brooklyn NY

Bikes: Kuota Kredo/Chorus, Trek 7000 commuter, Trek 8000 MTB and a few others

I put current Campy Centaur and Tektro R341 calipers/levers on my daughter's Cannondale from the late 80s. Much better than the old dia-compes that were on it. I also put Tektro RL720 cross levers on the tops because she wanted them. The whole setup works great. It does not look period correct but for brakes I'd rather have good working ones. It isn't as if the old stuff was anything classic anyway.
zacster is offline  
Reply
Old 10-09-20 | 08:59 PM
  #13  
Senior Member
15 Anniversary
Community Builder
 
Joined: Jun 2006
Posts: 21,868
Likes: 3,753
Verify the brake reach on the bike.
the AGC Aero calipers were decent.
the image shows them just beyond mid adjustment- the tire shows close clearances.
you are going to need a SHORT reach caliper.

the pads on the aero calipers were hampered by the small pads- reference Modolo parts might fit. I forget if these use a 5 mm or 4 mm attachment bolt.

the AGC levers were an early Aero upgrade - I run them on one bike with Campagnolo Record regular reach calipers since 1985.
repechage is offline  
Reply
Old 10-09-20 | 09:01 PM
  #14  
Senior Member
15 Anniversary
Community Builder
 
Joined: Jun 2006
Posts: 21,868
Likes: 3,753
I liked these calipers as they were small and smart. Could not use them on my circa 1972 bike.
repechage is offline  
Reply
Old 10-09-20 | 09:26 PM
  #15  
The Golden Boy's Avatar
Extraordinary Magnitude
Titanium Club Membership
15 Anniversary
 
Joined: Aug 2009
Posts: 14,085
Likes: 2,141
From: Waukesha WI

Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT

Originally Posted by SurferRosa
What would be a unique feature of a brake lever that would limit you to certain calipers? The only thing I can think of is if they're normally routed aero levers (left lever is the front), you will want the caliper's cable entry on the opposite side.

Going the other way (given a set of calipers and choosing new levers), I can understand a caliper without a quick release might force some folks to choose levers with one built in.
Originally Posted by tricky
I've heard folks around here make claims about some levers working better or worse than other levers when combines with certain calipers. Maybe cable pull is different for different levers? Shimano claims their SLR brakes work best with their SLR levers, but hard to believe big bike companies with claims like that.
For SLR- the return spring in the brakes is weaker than a normal return spring- it's not strong enough to open the caliper, pull the cable back, and pull the brake lever back to start. The spring in the SLR levers pushes the lever back to start. So if you're riding SLR brakes with non-SLR levers, you constantly have to flip your levers back to the start position after braking.
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*

Commence to jigglin’ huh?!?!

"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
The Golden Boy is offline  
Reply
Old 10-09-20 | 09:59 PM
  #16  
Senior Member
 
Joined: Oct 2015
Posts: 6,280
Likes: 612
From: Los Angeles

Bikes: 78 Masi Criterium, 68 PX10, 2016 Mercian King of Mercia, Rivendell Clem Smith Jr

Originally Posted by brian3069
Good call. Those might indeed be made to work. It would be really lucky if they used the same threads as the original AGC bolts. Even if they didn't, I think it would be possible to mod the AGC adjuster cam things to use a bolt with a different thread size.
Salamandrine is offline  
Reply
Old 10-10-20 | 05:17 AM
  #17  
plonz's Avatar
Senior Member
Titanium Club Membership
10 Anniversary
 
Joined: Mar 2015
Posts: 3,174
Likes: 966
From: Western MI
In case there is a question of the AGC levers working with other calipers, I’m using AGC 250 levers with Dura Ace BL-7400 calipers. I think they work great.

Side note: My levers did have the goofy screwed in cable housing end which I drilled out and replaced with a conventional cable housing. Not quite sure of the original intent of this contraption. Maybe it was supposed to make new cable housing installs easier.
plonz is offline  
Reply
Old 10-10-20 | 08:11 AM
  #18  
natterberry's Avatar
Senior Member
 
Joined: Sep 2017
Posts: 781
Likes: 398
From: Centennial, CO

Bikes: ‘85 Trek 760, ‘77/‘78 Trek 304, ‘74 Raleigh International

Originally Posted by The Golden Boy
For SLR- the return spring in the brakes is weaker than a normal return spring- it's not strong enough to open the caliper, pull the cable back, and pull the brake lever back to start. The spring in the SLR levers pushes the lever back to start. So if you're riding SLR brakes with non-SLR levers, you constantly have to flip your levers back to the start position after braking.
So is non-SLR brakes and SLR levers not an issue then?
natterberry is offline  
Reply
Old 10-10-20 | 09:23 AM
  #19  
The Golden Boy's Avatar
Extraordinary Magnitude
Titanium Club Membership
15 Anniversary
 
Joined: Aug 2009
Posts: 14,085
Likes: 2,141
From: Waukesha WI

Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT

Originally Posted by natterberry
So is non-SLR brakes and SLR levers not an issue then?
My guess would be yes- it's just an unnecessary assist in returning the lever.

(I tried using 6400 series brakes with old Superbe slotted non-aero levers- that was my experience with SLR)
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*

Commence to jigglin’ huh?!?!

"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
The Golden Boy is offline  
Reply
Old 10-10-20 | 09:26 AM
  #20  
The Golden Boy's Avatar
Extraordinary Magnitude
Titanium Club Membership
15 Anniversary
 
Joined: Aug 2009
Posts: 14,085
Likes: 2,141
From: Waukesha WI

Bikes: 1978 Trek TX700; 1978/79 Trek 736; 1984 Specialized Stumpjumper Sport; 1984 Schwinn Voyageur SP; 1985 Trek 620; 1985 Trek 720; 1986 Trek 400 Elance; 1987 Schwinn High Sierra; 1990 Miyata 1000LT

Originally Posted by plonz
In case there is a question of the AGC levers working with other calipers, I’m using AGC 250 levers with Dura Ace BL-7400 calipers. I think they work great.
I *THINK* BRS was/is DiaCompe's version of SLR. So you're effectively combining the same sort of idea with the same sort of idea.
__________________
*Recipient of the 2006 Time Magazine "Person Of The Year" Award*

Commence to jigglin’ huh?!?!

"But hey, always love to hear from opinionated amateurs." -says some guy to Mr. Marshall.
The Golden Boy is offline  
Reply
Old 10-14-20 | 08:30 AM
  #21  
Senior Member
 
Joined: Oct 2008
Posts: 1,072
Likes: 612
From: Seattle

Bikes: my precious steel boys

The Competizione I bought this year has the AGC levers linked to 105 SLRs, and they feel a bit "light" but stopping power certainly isn't a problem. (and honesty the "lightness" might be me being used to Campy NR brakes)
sheddle is offline  
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.