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1

The only thing I can think of is a similar behaviour I had on an M315 (IIRC) brake where the fluid would drip down, but I couldn't push it back up to the lever no matter what. The piston-thingy in the lever has a tiny hole which needs to line up with the port to the reservoir. For whatever reason, it was not lined up. I can't remember why but I think it had ...


2

Most levers come with some lubrication at the ball tip of the plunger (aka reach screw), so hopefully some of that escaping is all you're seeing to suggest you've lost fluid. When the snapring pops out like like this it's usually nothing to do with bleeding, so if you have lost fluid it's not clear why. If you have all the parts I would try just putting it ...


1

Shimano does not offer a tool to service the brake-bearings. Maybe it helps to see how i fixed the problem: https://forum.tour-magazin.de/showthread.php?268301-Der-quot-heute-hab-ich-geschraubt-quot-Thread&p=6421341#post6421341


7

In some cases people have made drop bolts to solve problems like this, but most of the time that's not an appropriate solution compared to just using the right reach brake. Adapters add flex you don't want and disallow use of the tire size the bike is presumably made for that got it to needing longer-than-short-reach brakes in the first place. Shimano makes ...


0

My personal preference regarding brakes is the linear pull or v-brake. So I did search for "V-barke adapter plate" and the results show several options. I have seen similar adapters used to install v bakes to a frame that does not have v-brake bosses. They attach to the seat stays by means of U-bolts or similar clamps. I'd be confident enough for ...


4

Leaky Shimano brakes very commonly leave a characteristic ring of oil where the piston contacts the pad. If that spot is dry, the bias becomes looking elsewhere for the leak, namely the hub. If you have the ring prominently, you're probably replacing the caliper. Sometimes with leaking calipers you can get to an answer by using alcohol and a rag to get the ...


7

I am somewhat confused by your description " they need pulling almost to the handlebar to brake". If you actually need to adjust the bite-point, that is done by tightening the cable at the brake caliper or by adjusting the pistons or using the barrel adjuster. For mechanical disc brakes with two movable pistons (Defy can apparently have TRP Spyre):...


4

Yes, and you understand what the potential downside can be. I wouldn't totally assume the chain rub will only happen on useless gears. I've also seen situations where it's not only rubbing but also picking inadvertently, which can be more of a hazard. Usually you can eliminate those issues and also make the front derailleur adjustment a little easier and ...


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