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I used to think it was so you can get the piston in and out but the new ones screw in from the inside meaning you have to remove the piston first.
Is the hole required as part of the machining process for single piece callipers??
Or is it just so you can colour coordinate your bike – I’m not knocking this as I just bought some red ones ?
Manufacturing reasons. How else would you machine the piston bore on both sides on a one piece caliper?
I dont know - im not a machinist
Yes, machining reasons - otherwise it'd be insanely difficult to machine the piston bores.
Yes I can see why this would be impossible - except for an army of milling tool equiped nano machines - there's an idea for the future
Could do it with a 3D printer, but I'm not sure you can 3D print in aluminium yet, or lost wax casting - not sure how you'd get the finish right, though.
didnt charge have some 3d printed rear stays made in Ti
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any excuse to show off my bores
Isn't it to give folks that bang on all the time about how loud their freewheels are something to wear on their heads?
😉
Loud freewheels are great - no need for a bell
So useful for the 0.01% of the time you approach a pedestrian from behind vs the rest of the time when it's just annoying to everyone around you? :p
sue me
Even if you can 3d-print a calliper with the bore in place... quite how exactly would the seals and pistons be serviced? Short of making the whole assembly non-serviceable *cough Shimano cough* that is... and that's very "un-Hope".
sue me
what times the dinner bell?