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Mix and match away.
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It's only the inserts that are different. The JK presumably stands for J-Kit, which is when calipers are supplied pre-bled. If you buy just the hose, obviously this isn't the case.
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how did you get on with this? I have the same thing, need FM calipers and flat bar levers. I can't even fit an adaptor in my frame, so keen to know a good combo.
snottyotter
chiroshi
JoeC
@märk_321
Can I use Shimano Ultegra R8070 flat mount calipers with flat bar levers?
As I understand then all Shimano 2-piston hydraulic calipers use 22mm diameter pistons.
But what about hose? Shimano has several hose series.
Shimano Ultegra R8070 caliper use the SM-BH90-JK-SSR hose.
Shimano BL-MT401 levers use SM-BH59-JK-SS or SM-BH90-SS hose.
Is the hose identical as long as it is BH90?
I assume that the only difference between these are the connection screws supplied with the kit? Also olives and inserts?