Anyone know anything about disc brakes?

Why not just squeeze the lever? What am I missing?

Its a gadget for the tool box ! Anyway i made two wedges from a tin plate in work .

Not sure on a comparison but my Ultegra Di2 (R8070?) are much shorter than the regular non disk shifters. I find them less comfortable that the regular ones on my other bike.

£11.95 for an uitlijngereedschap voor schijfremmen? Wow.

Got a Shimano BR-RS785 on my Pinnacle commuter which has sticky pistons, seized and stripped retaining bolt, and is generally corroding.

It’s got the straight rather than banjo fitting hose. Can I use a mtb caliper, such as the M525, instead?

Yeah.

Any suggestions for cheaper hydro drop bar levers for single speed?

R785 too much for London streets...

1 Attachment

Ouch! Bastards

Interesting. I have some trp hylex levers and I am looking for something shorter. How long are the r8070 from mid bar to the levers start to turn up. Like this drawing with trp hylex (59mm):

1 Attachment

My rear brake is still going soft. Going to completely drain it and refill. I assume I just take the pads out, attach a syringe at the bottom and suck all the fluid out?

...open top cap as well

Assuming is a Shimano I'd do it the opposite way. Attach fully charged siringe, attach cup and push the old fluid into the cup. Dispose and repeat if necessary.

I’ve pushed loads through but something isn’t right. I wanted to do a full drain, probably new olives as well.

you really want to pull air through the system?

Basically restart. If I can get some hose from the bike shop and I’ve got enough fittings I’ll completely reset the whole lot.

What brake was it? I don't think draining it will achieve anything more than flushing it through without draining it.

Ultegra. Something is wrong as air seems to get into it quickly. No obvious leaks though.

If air is getting in then fluid should be getting out assuming they feel good after the initial bleed.

You won't achieve nothing emptying the system and filling it again. I won't even bother to replace the fluid if it's freshly bleed. Just use the cup and remove any air, if it losses pressure over time there's definitely a leak somewhere.

Popped a piston on my hope rx4 while looking at a sticky piston ! Now i have lost all pressure . Will a re-bleed get it all back firing ?

Well that’s why I want to empty it and redo the hoses really. Nothing obvious on the calliper or shifter but I did two rides on it this week that were okay and then today the rear brake was more or less unusable.

Assuming you've got the piston back in OK without fucking the seals or anything, yeah.

Internal hoses?

Sadly, yeah so I think it also means taking the cranks off and whacking the BB out.

Yeh popped it back in carefully . I so wish they supplied the syringes rather than a umbrella !