I use the k24's 200mm up front and 160 on the back, they could stop a truck!
as for bleeding, here's some instructions wot I rote BLEEDIN BRAKES
Sorry for the hijack but bought some Formula the ones off here recently for an alps trip. Any recommendations on the most suitable pads to buy.
drew - SWissStop pads are supposed to offer the best combination of long life and braking force.
They're not cheap though
I had K18s which worked well but were horribly unreliable. They seized several times, once while miles from anywhere in the Cheviots and I had to remove the rear brake completely which is at least easy to do with the split clamp. The rear finally said goodbye on a rain sodden deathmarch across the Roych when instead of seizing it just wouldn't work at all.
I got the rear completely rebuilt with new seals in M/cylinder [a total faff apparently] and relegated them to the 2nd bike where to be fair they have been no trouble. I wouldn't buy any and I would think hard about buying a bike that came with them.
I've had two K24's both on the front, they are fantastic brakes with a ridiculous amount of power. I've never experienced brake fade on them even doing 10-15 min downhill runs. As for maintenance and pad life they are brilliant I hardly ever have to bleed them- last time was 3 months ago and they still feel great and the pads last forever as long as you use sintered and bed them in- I only had to change the pads once this winter and that was riding in the peaks grit and the latest pair have been running about 3 months
I have K18's and K24's.
Good - cheap, great modulation, plenty of power.
Bad - Bit of fiddle to bleed. Had to change the master piston on my K24's and that was a RIGHT faff, compared to working on Hopes.
Pad wear isn't as good as my old original minis, but they're not too bad. Getting a few instances of uneven wear though.
The main issue for me, is that I can't seem to get them to mate well with Shimano shifters. I can get them close, but there is too much bulk in the Oro bar clamp to get the shifter as close as I'd like. I have XTRs and XT shifters, both of which will allow me to adjust where the pod sits relative to the bar clamp, but they're not perfect. Irritates me. I may ditch them for saints or something.
I changed becuase I hoped they'd need less maintainence than my hopes. Hasn't really panned out that way.
Also, propel are utterly useless. CRC and UK bikestore carry plenty of spares.
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