Are SLX or even XT really an ‘upgrade’ over Formula RX?
SLX don’t have the freestroke adjuster but that’s about it.
I’m running Formula RX at the moment, having previously had SLX on another bike. SLX are a bit more immediate (less squidgy that Formula) and because of that I’d prefer to put some SLX back on, but for the cost and hassle of internal routing on my frame, I can’t be bothered.
To be honest it’s more about shedding heat. I drag the brakes a bit on alpine descents and I’d like something that cools just a bit faster. I only did it twice at the weekend but both times I very nearly had a pretty nasty accident.