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Old 05-11-06, 03:09 PM   #1
Vo2min
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Upgrade Single to Dual Pivot Brakes - Need to change the brake levers?

I'm changing my old single pivot Shimano 600 brakes to newer 600 dual pivots, hoping for better braking performance. Do I need to change the old levers (slotted Shimano 600 non aeros) with no spring return) to something newer with springs like SHimano 105s of Tektro 200s? Also, is the amount of cable pulled different on the newer levers?
Thanks for the help.
Steve
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Old 05-11-06, 04:56 PM   #2
Gonzo Bob
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You don't absolutely need levers with a return spring. I run Dura-ace dual pivots with levers that don't have a return spring and they work great.

Cable pulled is the same.
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Old 05-11-06, 05:09 PM   #3
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Quote:
Originally Posted by Vo2min
I'm changing my old single pivot Shimano 600 brakes to newer 600 dual pivots, hoping for better braking performance. Do I need to change the old levers (slotted Shimano 600 non aeros) with no spring return) to something newer with springs like SHimano 105s of Tektro 200s? Also, is the amount of cable pulled different on the newer levers?
Upgrading the levers would actually improve braking more than changing the calipers. Modern "aero" brake levers have less friction and improved geometry, which makes for much better braking from the hoods (about the same from the drops.)

You don't need to upgrade the levers, but it would be highly worthwhile. If money is tight go for the new levers and cables with your existing calipers.

However, if you choose to ignore my advice, the Shimano dual pivot brakes are designed to be compatible with old-style brake levers: Where the spring presses against the caliper arm, there's a little nylon lubrication block the spring presses against. If you're using old fashioned levers, you need to remove this block and flip it over so the thicker side is betwixt the spring and the caliper arm.

Sheldon "Options" Brown

P.S. I get asked about this a LOT, so I have a canned boilerplate email response I send out a couple of times a week. Here it is:

A caliper brake system consists of 4 parts:

•The levers
•The cables
•The calipers
•The brake shoes

All of these parts are upgradable. Many people think first of replacing the calipers, but, in fact, this is the least likely part to make any real difference. A caliper is a simple leverage unit, and there's not all that much to one.

In the case of older bikes, it can be difficult to find a new caliper that will even fit.

The other 3 parts are much more likely to yield real improvement.

•The levers

Older designs had the cables exit up from the front of the brake levers, arching over the
handlebars. The newer style, where the cable exits out the back of the lever and runs under the handlebar tape is referred to as "aero" because it eliminates the wind drag of the exposed cables.

Aero levers are generally a major improvement over the older type. The pivots are located differently, making it possible to get fairly serious braking from the position where the rider's hand is on top of the lever hood. Traditional levers would permit the use of this position for gentle deceleration only.

Additionally, the better aero levers have better internal cable routing, so there's less cable friction. I particularly recommend the Shimano Tiagra units we sell for $39.95, including cables. See: http://sheldonbrown.com/harris/brakes.html#leversdrop

•The cables

Older cables used metal-to-metal contact as the inner cable slid through the spiral-wound steel housing. Lubricant was by grease, if the mechanic was conscientious.

Modern cable housings have a Teflon or similar lining. The better inner cables are stainless steel, and are "die drawn" to make them smoother. The result is greatly reduced cable friction, so more of your finger strength is transmitted to the caliper, rather than wasted overcoming cable friction.

•The brake shoes

Modern high-performance brake shoes also make a considerable difference. The very best is the ugly salmon-colored material originated by Scott-Mathauser, and now sold under the Kool Stop name. See: http://sheldonbrown.com/harris/brakeshoes.html

All the best,

Sheldon
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Old 05-11-06, 06:09 PM   #4
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That's great advice on the levers, especially since the bikes' frame is a little small for me which makes the handlebars too low, so I'm always on the hoods, never the drops. This made braking in the rain really scary, which is why I bought the dual pivots! I'll get the newer levers and cables to go with the dual pivots. The installation will give me an excuse for installing my taller Nitto Technomic stem and improve my fit on the bike.
Thanks Sheldon!
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Old 05-11-06, 06:22 PM   #5
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Modern high-performance brake shoes also make a considerable difference. The very best is the ugly salmon-colored material originated by Scott-Mathauser, and now sold under the Kool Stop name.
You didn't tell me they were ugly when I ordered them from you!

Actually I think they are pretty good looking, particularly the slip-in pads used with current Shimano and Campy brakes, and they DO work. Shimano pads are very good but these are better.
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