Originally Posted by
glye
Right, given that customs situation it's understandable. And if you can't find any domestic bike parts company that imports these things, you're limited indeed. Too bad.
Brake upgrade: I see no need. The original works very well. Brake power depends on both disk size and wheel size. With the tiny 355-size Birdy wheels and relatively big 160 mm rotors, you get good braking. It corresponds to something like a 260 mm disk on a 29er wheel, but they are often happy with "only" 200 mm.
RT86 with opposite rotation: Yes, potential problem. Should not be run backwards, and may not fit when flipped. Try before you buy
Could you advise which other popular brand would do XDR hubs? I searched 135mm XDR HUB and had no prices in local google shopping. Every bicycle shop I came across had Shimano products all over them.
Regarding flipped disk, I’ll definitely try before I buy as my mechanic who will rebuild the wheel and install all parts is the one I’m buying parts from. He will definitely check the alignment first. If alignment is fine is there any other issues to use it flipped? The reason why I’m thinking about RT86 in the front is the front brakes get the most load while breaking and better cooling properties of the rotor can’t hurt.