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@du_B
Hello, I have an IS mount frame I've been running post mount shimano calipers on BR RS785 using IS adaptors with 160mm front and 140mm rear rotors. It's ultegra 6800 with non series r785 levers.
The frame is 10 years old and things have moved on a lot..!
I've bought an etap rival axs groupset(di2 won't work with my frame)which came with flat mount calipers I'l sell on, I did hope to put Hope RX4 on but Hope told me I would need to use their post mount to IS adaptor and that only works with 180mm and 160mm rotors which I dont want to do.
SRAM in this instance recommend using their Level post mount caliper with an adaptor, as the Hope reply was unexpected and I thought i could use my existing adaptor set up with their calipers I wondered if anyone knew if the SRAM would fit my shimano adapters(or SRAM specific ones) to run 160/140? The level are harder to find and I need to order from Spain(Bikeinn cheapest and one of few places thet stock)so want to be sure before I order.
Am keen to build it but as its my only bike want to get all parts in place before I start.
I also thought I could try older rival/force post mount calipers but am sure I read somewhere they aren't compatible with newer 12 speed axs.
Any help really appreciated, thanks.