Technical disc brake question

[User]

 

[mickle]

Whats the measurement between the brake lever pivot and the cable barrel? C to C.

 

[RecordAceFromNew]

Mickle since the distance between lever pivot and cable barrel stays constant for road/mtb switchable lever/brifter (which works by changing the cable attachment point within the lever to change the leverage), shouldn't the test be for the OP to measure the amount of cable he can see being pulled by the lever in relation to lever travel at the fingers?

If the amount of cable pulled is around one-fifth of the lever travel, then the levers are road brake compatible. If it is more like two third, then mtb orientated brakes are needed.

 

[fossala]

I have bb7 road on my kona honky inc. Tell me what I need to measure and I will.

 

[mickle]

[QUOTE 2289547, member: 45"]So Mick, the man who knows everything.

What do you know?[/quote]


There's two standards. Levers with a pivot to barrel dimension of +/- 25mm are suitable for use on centre-pull calipers, side-pull calipers, (old-style short-arm centre-pull) cantilevers and most, if not all drum brakes including Shi**no roller brakes. Until recently all drop bar levers were this pattern.

With the arrival of linear-pull, 'long arm cantilevers', or 'V-brakes' (Circa 1996) came a dedicated lever with a pivot to barrel dim. of +/- 35mm.

So there's 'V-brake' levers, and there's 'everything else' levers. The two types are not compatible without the use of a dedicated cable pull adaptor/convertor of some kind.

 

[mickle]

[QUOTE 2290151, member: 45"]So, my levers are same pull as drop bar levers and I'd need the road version of the BB7?[/quote]
I think so yes.

 

[mickle]

Aye.