My new RD came in today, the one that might solve all of my shifting problems on my SRAM XX1 10-42 coupled with two chain rings in front.
https://www.sram.com/sram/mountain/p...ear-derailleur
It looks like it's gonna work, but dang! The SRAM Rival shifter for the RD doesn't match the new Mountain RD, because the Rival is a road RD shifter. So I need a new set of mtb shifters, which means a different set of handlebars, since mtb shifters are not made to work on drop handlebars. Luckily, I happen to have a set of trekking bars and a matching aluminum stem from a dead bike that should transfer and make a nice solution to my hands going numb from being on the brake/shifter hoods all the time. Yes, this has been an expensive gearing conversion. Apparently one of my skills is finding the most expensive way to modify a bike. OTOH, it saved me from buying a whole brand new bike to get the gearing I need, and guess what bike my mechanic was going to suggest? A Trek 920. As a bonus, the mechanic offered to buy my used Rival RD and Shifters, and his buddy might be interested in my old Bridgestone RB-1. Hopefully I may recoup a bit of my costs.