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Higher end shimano stuff has ceramic pistons no?
@coventry_eagle @chiroshi
Hose design is where you lose modulation when you mix and match. If I remember right, Bh59 is a small bore pressure hose, wheras the BH90 is a larger/volume bore, hence either loss of modulation or bite if you mix and match. Old saint's/Zee/XT 4 pot stuff used to be fitted with volume hoses.
Chak-
I remember having a customer who had issues that his brakes were losing power when using it.
It transpired he was using a different hose than the Shimano one, so when applying the brakes, the hose literally swelled up the entire way.
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Pretty sure bh90 is more current and is being used across the range from the top end XTR/Saints to the lower Deore stuff. This is from experience as I've not come across BH59 in the 3 disc setups I've encountered - Deore, SLX and Saint.
edscoble
coventry_eagle
Hylex calipers use 21mm pistons
Old shimano (aluminium cup with black plastic inside) are also 21mm so should be a match.
Most new shimano have 22mm pistons (white
plasticceramic or "glass fibre phenolic" material), so I guess youlosegain a little modulation andget a more on-off feelpads run closer to the rotor.So basically any shimano caliper should work (except saint which have weird/4 pistons)