Seatpost suspension on bi-suspension RM?

[Stefan Mikes]

R&M owners can certainly afford a wireless dropper

RockShox Reverb AXS dropper post review

The new Reverb AXS dropper post does away with cables but doesn’t come cheap

www.bikeradar.com

 

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Or additionally get these: https://www.sks-germany.com/en/products/bluemels-series/bluemels-75-u-long/ (try and fit them with extra space around the tire) or other suitable wider rear mudguard/fender to go with, if it will fit: https://www.schwalbe.com/en/mtb-reader/smart-sam in 65-70mm width or other tire that will fit.
This should give you a bit more tire suspension in the rear at lower pressure's. Perhaps also with Tannus Armour.