Only rated for 11kg, compared to 25kg for most standard racks.I had this on my Scott FS 29er and is reputed to fit most bikes by clamping to the chainstays. Easy to fit and remove and aditional side pannels cover most pannier mounts. Not cheap tho...
https://www.amazon.co.uk/Thule-Pack-Pedal-Tour-Rack/dp/B01N6RORTM/ref=sr_1_1?ie=UTF8&qid=1540718205&sr=8-1&keywords=thule+pack+n+pedal
Only issue I had was the frame mounting screws supplied were too short and had to replace with longer threadsTortec rack fitted to my 29er cube reaction bought the disk model fit is fine it has the side rail for the quick release cube panniers to fit straight on . Not sure on the weight rating bought from tredz when they had a deal on .
My Trek HT came with extra seatpost clamp that had mounting points. Don't why didn't fit mounting points on frame. Wouldn't work in your case as its FS. For FS MTB Thule is about only option.For me it was the only option.. Dropper post negated the seat post fitting and there were no mounting points on the bike. I had a pair of alture bags on mine and it worked well enough for me.
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