Disc brakes, both hydraulic and mechanical, can also have the reach adjusted. (that's what it is called) There are little allen screws on the inside. This is a critical and often overlooked element of correct bike set up. Sometimes repositioning the brake levers closer in can really help, as can the proper angle. So there are three potential adjustments you can do, really. I've done this on all my mountain bikes... disc brakes, center pull and side pull.
Useful tutorial, although it could use photos:
http://www.mtbtips.com/mountain-bike...etup-position/
Here's the screw for adjusting the reach.
Great photo of correct hand angle on the brakes. Note the "one finger" set up... this is how disc brakes should be set up ( not for grabbing a handful)
Brake position shifted closer to center of bar
another tutorial for setting up the whole cockpit with photos...
http://www.bikeradar.com/gear/articl...in-bike-20662/






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