Bicycle Mechanics - Brake adjustment for dummies!
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Somehow, I've managed to fine tune my brake adjustment for years without every really understanding what I was doing! Where the cable meets the brake lever housing, there are two knobs, one larger in diameter and right up against the lever housing. The other is smaller diameter and farther away from the lever housing. One is somehow a lock? But could someone please explain how these two knobs work in combination? Maybe I'll finally learn! (Most instructions simply assume anyone would understand this! I don't....) rcd
07-30-09, 11:05 AM
The knob closest to the lever housing is the adjustment knob. The other is the locking mechanism to keep the adjustment knob from creeping. :)
What kind of brake system are we talking about here? A mountain bike's, I presume? Nearly all road bike adjustments are made down at the caliper.
07-30-09, 12:20 PM
The large thin one against the lever housing is the lock-nut. The thinner one that the cable housing enters, is the adjuster. To make adjustments you first have to move the lock nut away from the lever housing. If you want to move the brake pads closer to the rims to compensate for wear, you have to turn the adjuster in the direction to move it out from the brake lever housing. When you have it right screw the locknut back to the lever housing.
These two contradictory replies about which is the lock nut only give me confidence that I'm not a complete mechanical dummy! I know much depends on the brake model and setup, but I've seen the combination (in one variation or another) on many bikes over the years. So if I understand: the larger lock nut does not need to be moved up against wherever the now-adjusted smaller nut has been positioned (which is more or less what I've been doing for years). Instead, the lock nut LOCKS only when it is up against the brake lever housing. One needs to move it away in order to be able to move/adjust the other nut/barrel, then move it back to the lock position? Makes sense. I'll have to give that a go! Thanks! rcd
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