Specifications
Frame: Alpha Silver Aluminum w/semi-integrated head tube, rack & fender mounts, G2 Geometry on 29ers
Fork: RockShox 30, coil spring, preload, TurnKey lockout, G2 Geometry w/51mm offset on 29ers, 100mm travel (13.5: 80mm travel)
Headset: 1-1/8" threadless, semi-integrated, semi-cartridge bearings
Rims/Wheels: Bontrager Connection 32-hole double-walled
Hubs: Front: Formula DC20 alloy; Rear: Formula DC22 alloy
Spokes: Bontrager 14g
Tires: Bontrager XR2, 29x2.20" front, 29x2.00" rear (13.5 & 15.5: 27.5x2.20")
Crankset: Shimano M351
Chainrings: 44/32/22
Bottom Bracket: Sealed cartridge
Chain: KMC X9
Front Derailleur: Shimano Altus
Rear Derailleur: Shimano Acera M3000, Shadow
Rear Cogs: Shimano HG20, 11-34, 9 speed
Shifters: Shimano Altus M370, 9 speed
Handlebars: Bontrager alloy, 31.8mm, 15mm rise
Tape/Grips: Bontrager Race
Stem: Bontrager alloy, 31.8mm, 7mm rise, Blendr compatible
Brakes: Tektro M285 hydraulic disc
Pedals: Wellgo nylon platform
Saddle: Bontrager Evoke 1.5
Seatpost: Bontrager SSR, 2-bolt head, 27.2mm, 12mm offset

More info
https://www.trekbicyclesuperstore.com/product/trek-marlin-7-263197-1.htm
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https://www.youtube.com/watch?v=8tKTmbTVas4