The function of the balance screws

Each V-brake unit has a balance screw. You’ll find it at the bottom of the unit, usually a crosshead bolt but occasionally a small Allen key. The end of each bolt rests on the end of the brake-return spring, so that the spring is forced against the bolt when you squeeze the brake unit towards the rim.

Turning the balance screw alters the preload on the spring, pushing its starting point further around the unit for a stronger spring action and releasing it for a weaker spring action. The confusing part is remembering which way to turn the screws for the effect you need. • Turning the balance screw clockwise (A) pushes it further into the unit, increasing the preload on the spring, making it springier and pulling the attached brake block away from the rim. • Turning the balance screw anticlockwise (B) unscrews it from the unit, decreasing the preload, softening the spring and allowing the brake block to move nearer to the rim. Since the two units are connected together by the cable across the top, adjusting one balance screw will affect both units: if…

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Bike Maintenance Tips, Tricks & Techniques (Digital) - 1 Issue, Bike Maintenance Tips, Tricks & Techniques 3rd Edition

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