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Unusual Shimano Tourney Front Center Pull Brake

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Unusual Shimano Tourney Front Center Pull Brake

Old 08-03-16, 05:24 PM
  #26  
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I have had a pair (not sure if i sold these at the last swap or not) and also found them to be disappointing: no real improvement over Weinmann/DiaCompe CPs and if anything slightly worse...no idea why they under-perform, it's not an obvious defect.

Anybody who wants a pair PM me and I'll see if I still have 'em.
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Old 08-03-16, 07:23 PM
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Originally Posted by unworthy1
I have had a pair (not sure if i sold these at the last swap or not) and also found them to be disappointing: no real improvement over Weinmann/DiaCompe CPs and if anything slightly worse...no idea why they under-perform, it's not an obvious defect...
Did you see post #16?
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Old 08-03-16, 09:43 PM
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^I don't believe there was any perceptible sliding of the cable in that "yoke" in actual use...but that's based on foggy memory and not scientific testing. Could be just the geometry of the arms/pivots being slightly different (and not better) to the time-tested Brands W, DC and M...
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Old 08-04-16, 03:59 AM
  #29  
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There is no sliding involved.

The geometry of those calipers is very similar to a Weinmann 610. I used to have a side by side picture for comparison, but Image Shack seems to have lost it.
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Old 08-05-16, 05:42 PM
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OK, there are two options. Either the cable slides in the yoke, or the action is asymmetric.
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Old 08-05-16, 05:57 PM
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I don't want to get in on the speculations for the reasons that they are not really that great of brakes, but will chime in that I had a set on my Maruishi, one of the first bikes that I started messing with. It was not to long before I swapped them with some Mafacs. Years later, I put them on another beater bike, and took them right back off and found some Wienmanns.
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Old 08-05-16, 07:04 PM
  #32  
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I do my best to ensure that my yoke cables are smooth and free or unwanted bends. I smooth the old cable with aluminium foil, then apply grease to the cable. As for the yoke, itself, I test the action of the yoke cable in the yoke, to ensure that there is no binding. Why do I do this..?

I always thought the purpose of the yoke was to transmit force and to help center the yoke on the yoke cable. Perhaps I was over thinking the system, but they do seem to work pretty good once I set them up the way I just described.

While on the subject, I just installed these yoke pulleys on my Bianchi and they work great. I had to free them up, ensuring that the pulley rotated freely, before I installed them...
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Old 08-08-16, 07:52 AM
  #33  
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Here is a picture of the Shimano 500 brake on my commuter bike.
BTW, the cable does slide in the yoke, but only a small amount, so there is not a lot of friction added.

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Old 08-08-16, 12:19 PM
  #34  
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Originally Posted by paulkal
Here is a picture of the Shimano 500 brake on my commuter bike.
BTW, the cable does slide in the yoke, but only a small amount, so there is not a lot of friction added.
It seems like you could smooth out that action with a piece of cable liner. What do you think of these brakes?
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Old 08-09-16, 05:43 AM
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Originally Posted by Andy_K
It seems like you could smooth out that action with a piece of cable liner. What do you think of these brakes?
They are fine brakes, much easier to set up than Mafac brakes, although I haven't touched Mafac brakes in 30 years.
A cable liner is not going to fit, the yoke is too narrow and it is not necessary, there is only a tiny amount of friction.
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Old 08-09-16, 07:19 AM
  #36  
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One more digression: These Weinmann CP brakes were originally on a Motobecane Grand Touring, now reside on my Grand Jubile along with a Stronglight triple crank from the same donor. I have only seen a couple of other examples over the years. Don
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Old 08-09-16, 07:23 AM
  #37  
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FWIW the brakes that I initially referred to work fine. I'm using Cane Creek "Grey Matter" pads which are designed for steel rims. They're softer than the Kool Stops, so wear faster BUT they don't squeal.
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Old 08-09-16, 09:41 AM
  #38  
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Originally Posted by paulkal
Here is a picture of the Shimano 500 brake on my commuter bike.
BTW, the cable does slide in the yoke, but only a small amount, so there is not a lot of friction added.

I always got the impression that the fixed yoke affected the mechanical leverage more than a conventional straddle and acted like a subtle brake damper.

It has been a while since I have worked on these but have some kicking around.
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Old 08-09-16, 09:43 AM
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Originally Posted by shipwreck
I don't want to get in on the speculations for the reasons that they are not really that great of brakes, but will chime in that I had a set on my Maruishi, one of the first bikes that I started messing with. It was not to long before I swapped them with some Mafacs. Years later, I put them on another beater bike, and took them right back off and found some Wienmanns.
I have always been partial to Mafacs... with the right set up and a few upgrades to the hardware and pads they are really excellent stoppers.
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Old 08-09-16, 01:24 PM
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Originally Posted by Sixty Fiver
I have always been partial to Mafacs... with the right set up and a few upgrades to the hardware and pads they are really excellent stoppers.
Same here. They take patience to set up, but I've done it enough times that I can do it easily. That's not a selling point to people without experience with them. I haven't upgraded the hardware, only changed the pads to Kool Stop.
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Old 08-09-16, 11:35 PM
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Originally Posted by noglider
Same here. They take patience to set up, but I've done it enough times that I can do it easily. That's not a selling point to people without experience with them. I haven't upgraded the hardware, only changed the pads to Kool Stop.
The stock hangars tend to be very flexible, swapping them for stiffer ones makes a huge difference in response.
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Old 08-10-16, 10:20 AM
  #42  
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Good point, @Sixty Fiver. My only bike with them is my Super Course. The front has the original Weinmann hanger, which is good, and the rear has the brazed-on loop, which is even better.
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Old 08-10-16, 11:29 AM
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Does anyone here know if there's a way lighten the action (lighter springs?) of Dia Compe/Weinmann 610's? I've been using them for a year and they work great I just wish I could get a lighter lever feel.

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Old 08-10-16, 11:49 AM
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I have them on my 'Ronnie Hearse' (a you-know-who imitation with a British frame and cheap Japanese parts). They work fine, like all Shimano parts do. And they have the reach to deal with the 27" to 28" conversion.

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Old 08-10-16, 11:55 AM
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Originally Posted by paulkal
(...) although I haven't touched Mafac brakes in 30 years.
.
You were already wrenching on MAFAC brakes at the age of five?
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Old 08-10-16, 12:26 PM
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Originally Posted by willydstyle
I'm not sure how to use it either, my eye wandered to the case full of vintage derailleurs and he was done by the time I looked back at the stand.
Park Tool has a series of videos on brake adjustments. This video is the starting point and contains links to each of the brake type specific videos:

I've found them very valuable when working on some of the older styles of brake setups.
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Old 08-10-16, 02:16 PM
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Originally Posted by FLJeepGuy
Park Tool has a series of videos on brake adjustments. This video is the starting point and contains links to each of the brake type specific videos:

I've found them very valuable when working on some of the older styles of brake setups.
Oh yeah, I'm sure I could figure it out easy enough, I was just making a joke about how easily I'm distracted by vintage bling, and how fast the tool made adjusting a set of centerpulls
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Old 08-10-16, 02:33 PM
  #48  
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Originally Posted by Sixty Fiver
The stock hangars tend to be very flexible, swapping them for stiffer ones makes a huge difference in response.

Strange that they never changed the design of the hangers if it actually makes a huge difference.
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Old 08-11-16, 01:32 AM
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Originally Posted by Grand Bois
Strange that they never changed the design of the hangers if it actually makes a huge difference.
Do you think they knew it was a weakness of their brakes?
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Old 03-05-17, 12:23 AM
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I have them on my ventura Malibu and I love them I set them
Up in almost no time at all
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