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Customer Review

2 of 2 people found the following review helpful
4.0 out of 5 stars This is a handy tool if it works on your brakes, May 8, 2012
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This review is from: Park Tool OBW-3 Offset Brake Wrench - Brake Centering Tool (14mm) (Sports)
This tool makes centering and adjusting many type of brakes very simple and easy.

But on some brakes it just doesn't fit in behind them to grip the spring loops as there isn't enough room between the brake bridge/fork crown and the caliper. In such cases the only way to really do it is to take big screwdriver and place it on the brake arm and using a rubber mallet GENTLY tap the side you want to move down (and over toward the rim.) It's not as slick as using this tool but it does work. You can use this method for any brake but the screwdriver or other tool you are using to tap the brake can put a mark on or scratch an alloy brake arm.

The thin offset wrench part is designed to get down onto the mounting bolt itself and grip wrench flats (if it has them) by where the spring mounts and turn the entire bolts. Sometimes even a thin offset wrench can't get down there very well or there are no wrench flats on some older bikes to grip -that part of the bolt is round without flats.

The other side of the tool is designed to grip the loops of the spring itself and tweak the spring or even pivot the entire caliper slightly on the mounting bolt.

Some mounting bolts have serrations on them to keep them from rotating, and can only be crudely adjusted by 15-20-degree intervals and will not allow the brake to sit between these detents. In these situations you will need to actually bend the spring(s) itself to adjust the tension it is putting on the arms. In these cases the screwdriver method is much more difficult and may damage the spring. This tool makes bending and re-tensioning the sides of the spring itself easy (and NOT a snap -ha!)

For an occasional home mechanic this tool may not be worth it unless you know it fits your bike and you need it often. But for someone who works on bikes more often it's a necessary tool to have in your kit. Bopping on a customer's brakes with a screwdriver as a matter of course is not good practice -sometimes it is the only way, but when this tool works it's a better way.
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