My 9.9 just arrived, can't give any real impressions yet as it's dark and not ridden it yet, however I have noticed it has some Sram Quarq tyre pressure sensors !, Didn't even know such things existed !, The spec from Trek doesn't mention including them, maybe it's a 2021 thing, anyway, anyone else got/used them ?, Not sure of their value, It looks like they work with the AXS app, rather than the Bosch system on the bike