Rear Brake Torque Arm Benefits

KevTM · World Chat Champion Joined: 15 Apr 2004 Karma :

Just something I've wondered about recently. Why have a torque arm and not just bolt the caliper to a tab on the swingarm? I know some bikes have the caliper at the top and bolted to the swingarm. Going by that the only thing I can think of is the swingarm getting pushed down harder the more brake applied? -

But why have a torque arm and not just have the caliper at the top? There must be benefits surely.

NSR Mick · World Chat Champion Joined: 26 Jun 2005 Karma :

A torque arm will help to stop the back rising whan you use the back brake. What benefit there is to that I dont know as

1. I never use the back brake.
2. My NSR's have it fixed at the top and who am I to argue?
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KevTM · World Chat Champion Joined: 15 Apr 2004 Karma :

Yeah guessed it had something to do with suspension or something. Just wondered why a lot of bikes opt for that setup rather than, what I'd think is a simpler and superior method of just doing what a lot of Hondas do and have i at the top bolted to the swinger.

Honda know what they're doing though Laughing

Pete. · Super Spammer Joined: 22 Aug 2006 Karma :

chris-red · Have you considered a TDM? Joined: 21 Sep 2005 Karma :

Mine is like this,

*Whorage*

https://img.photobucket.com/albums/v295/chris-red/P1000836.jpg

Cool

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stinkwheel · Bovine Proctologist Joined: 12 Jul 2004 Karma :

I suspect it's just cheaper and easier to use a torque arm. Any other system has to have some way of moving with the chain adjusters which takes more engineering than a bit of flat bar with two holes in it.

Or possibly because nobody thought of it. Like a lot of early front disc brake callipers were mounted on the FRONT of the fork leg rather than the back meaning the lugs had to take the full braking force. GT series suzukis and the Laverda Jota being classic examples of this.
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NSR Mick · World Chat Champion Joined: 26 Jun 2005 Karma :