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-   -   How can I tell v-brake and canti levers apart visually? (https://www.bikeforums.net/bicycle-mechanics/468831-how-can-i-tell-v-brake-canti-levers-apart-visually.html)

Seggybop 09-22-08 09:50 PM

How can I tell v-brake and canti levers apart visually?
 
I need to get a v-brake lever and I know a guy who collects bike stuff that has a pile of brake levers. The problem is that the canti levers and v-brake levers are all in this pile together and I have no idea how to tell them apart when they're not set up on a bike. Is there some way to distinguish them without attaching a cable and measuring the relative cable pull?

z415 09-23-08 12:34 AM

Here

SweetLou 09-23-08 01:29 AM

V-brakes pull the cable twice as far. This means that where the cable is pulled will be twice as far away from the pivot point compared to canti levers.

dabac 09-23-08 02:22 AM


Originally Posted by Seggybop (Post 7523714)
I need to get a v-brake lever and ..have a pile of brake levers. The problem is ..I have no idea how to tell them apart ... Is there some way to distinguish them without attaching a cable and measuring the relative cable pull?

Canti levers will have abt 27 mm between lever pivot and cable attachment while V-brake levers will run abt 35 mm.

dabac 09-23-08 02:26 AM


Originally Posted by SweetLou (Post 7524472)
V-brakes pull the cable twice as far.

They pull more, but I don't know if it's double.


Originally Posted by SweetLou (Post 7524472)
This means that where the cable is pulled will be twice as far away from the pivot point compared to canti levers.

No, the geometry doesn't work like that. The cable attachment point travels in an arc, and you don't need to double the radius to get double the circumference.

cerewa 09-23-08 08:30 AM


The cable attachment point travels in an arc, and you don't need to double the radius to get double the circumference.
Yes you do.

circumference = 2 * (pi) * radius
therefore if you double the radius then you double the circumference
http://en.wikipedia.org/wiki/Pi

I wonder if it's that the effective pivot point is the center of the pin that holds the brakelever handle to the brakelever-handlebar mount... so if you measure the distance to the edge of the pin rather than the center of the pin, you will not get the effective radius.


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