I'm building up a drop bar bike and working with sram for the first time.
The issue I've run into is that a local shop advised me that the indexing for the sram 11 speed road line and the mtb line was the same. So I've got a complete gx drivetrain (cassette, rear mech, crankset) hooked up to a sram s-500 bar-end shifter (which I have now been told is incompatible).
It should also be noted that I have trp hylex brakes so brifters aren't the ideal solution in this case.
I'm trying to salvage this build and it's been suggested that I just buy an apex rear derailleur and swap it out, but I'm concerned about it's compatibility with the 10-42t cassette (SRAM XG-1150 GX 11 SPEED).
If I could go back and do it again I'd just buy the complete road group with brifters and use mechanical brakes, but I'd like to avoid re-selling what I've got if possible.