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How To: Bleeding Hayes Prime

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There has obviously been a lot of talk surrounding the new Hayes Prime disc brakes, however there really hasn’t been that much info focused on what I feel is one of the most important features: bleeding. Sure, performance, weight, looks, etc, are all very important factors, but long term serviceability is key to creating a product that will stand the test of time. No one wants a part that works great for the first year, but later suffers from performance issues due to the inability to properly service it.

Astute readers should have noticed that we mentioned the Prime looks to have an all new bleed system, when compared to previous Hayes brakes. Now, both the caliper and lever have threaded fittings for attaching the bleed equipment, and by the looks of it, it looks fairly straight forward and simple. Granted, you have to remove the brake from the bike, but this will guarantee that brake fluid is not accidentally spilled on the rotors, or the rest of the bike.

Clearly, the video above is provided by Hayes, but we hope to get our hands on an actual bleed kit in the future to give you a first hand account, and to verify bleeding Primes is as easy as this video makes it seem!

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12 years ago

They can’t be serious. Squeeze bottles? Make a few passes? Rotate the lever up and down at two different angles? Does it help to hop on one foot while I do it? So the “pro” bleed kit uses a spoke to attach the catch bottle to the handlebar? This is the same bottle that is supposed to be flipped upside down twice? Crap like this makes me not even want to be a mechanic anymore. Just when I thought it couldn’t get much worse than the huge procedure I have to go through to bleed Avid brakes, Hayes comes up with this. Once upon a time Hayes brakes could be bled easily in just one step after everything was attached to the brake. Apparently those days are over.

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