Ok, so I do have the 2021 Trek FX Sport Carbon 4 and really like it......it's only the second complete bike I've ever bought (the first was in 1991) but I am already changing basic parts for the contact points: pedals, CF handlebar w/Cane Creek bar ends, CF seatpost & CF saddle.........I'm changing the tires to tubeless (coming from MTBing, I've been running tubeless for years) and will try 35s......the bike handles really well and the drivetrain runs smoothly: GRX - 812 derailleur with a 600 crank on an SLX 11-42 cassette (I have a full XT 1x11 drivetrain on my SC Tallboy for comparison)......coming from a bike that was slightly small, this has been a joy to ride but I will customize the cassette to 11-47 using a OneUp conversion and add a 42T chainring.........