I have a brand new Trek Marlin 5 (1-2 months old) with hydraulic disc brakes and the rear brake doesn’t work well and when I pull the brake lever, it clicks once somewhere in the frame (cables inner routed).
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4You should take this back to the shop you bought it from; that's way too soon for anything to be wearing out.– DavidWJul 12, 2020 at 18:00
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2 Answers
First, don't ride the bike if one of the brakes is not working properly. Not working well can change to not working at all and put you in a dangerous situation.
Take the bike back to the store where you bought it, a 2 month old bike with a major brake problem should be fixed under warranty. In any case if you do not have experience diagnosing and repairing hydraulic brakes you should have a professional address this problem.
The problem is likely that the rear brake has lost hydraulic fluid, or perhaps a seal has broken in the lever or caliper.
answered Jul 12, 2020 at 17:10
Clicking on hydraulic brakes with inner routing can be just cable hitting a frame when moving under increased tension. What is exact problem with braking? - do you need to apply extra force to brake or you feel like rotor is still spinning even under max pressure?
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Unlike with cables, I can't feel any of my brake hoses move under increased hydraulic pressure. So for properly installed hoses, I don't think the hose could "just" be hitting the frame. Jul 14, 2020 at 9:21