Trek FX Sport 4 vs Trek Session 8 29 GX

Load Carrying Capacity	--	Combined weight of bicycle, rider, and cargo of 300 pounds (136 kg)
Frame	FX Alpha Gold Aluminum, DuoTrap S compatible, rack & fender mounts	Alpha Platinum Aluminum, high main pivot, idler pulley, integrated frame protection, internal or external routing, magnesium rocker link, Mino Link, ISCG 05 2-bolt mount, Active Braking Pivot, 157 x 12 mm thru axle, 200 mm travel
Stem	Bontrager Elite, 31.8 mm, 7 degree, with computer & light mounts	Bontrager Line Pro, 35 mm, Direct Mount, 50 mm length
Handle Bar	Bontrager Satellite Plus IsoZone, 31.8 mm, 15 mm rise	Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width
Fork	Bontrager Nebula, carbon	RockShox Boxxer Select, DebonAir spring, Charger RC damper, 46 mm offset, 20 x 110 mm Boost thru axle, 200 mm travel
Seatpost	Bontrager SSR, 2-bolt head, 27.2 mm, 12 mm offset	Bontrager Rhythm Elite, 31.6 mm, 0 mm offset, 330 mm length
Grip	Bontrager Satellite IsoZone Plus, lock-on, ergonomic	Bontrager XR Trail Elite, nylon lock-on
Crankset	Shimano R460	Truvativ Descendant DH, DUB 83, 34T steel ring, 165 mm length
Pedals	Nylon body with alloy cage, toe clip & strap	Wellgo BO-87B, alloy body, Cro-Mo axle, replaceable pins
Chain	--	SRAM PC-1110, 11 speed
Shifters	Shimano Tiagra, 10 speed	SRAM GX DH, 7 speed
Saddle	Bontrager H1	Bontrager Arvada, hollow chromoly rails, 138 mm width
Headset	VP Slimstak, sealed semi-cartridge bearings	--
Derailleur Front	Shimano Tiagra	--
Derailleur Rear	Shimano RD-R350	SRAM GX DH, medium cage
Hub Front	Formula TK32 alloy	--
Hub Rear	Formula TK31 alloy	--
Cassette	Shimano Tiagra, 11-34, 10 speed	SRAM PG-720, 11-25, 7 speed
Chainrings	48 / 34	--
Bottom Bracket	--	SRAM DUB, 83 mm, BSA threaded

Front	Bontrager AW1 Hard-Case Lite, 700 x 28 c	Bontrager G5 Team Issue, wire bead, 2-ply 60tpi, 29 x 2.50''
Rear	Bontrager AW1 Hard-Case Lite, 700 x 28 c	Bontrager G5 Team Issue, wire bead, 2-ply 60tpi, 29 x 2.50''
Wheel / RIM	Bontrager Tubeless Ready rims	Front : Bontrager Line DH 30, Tubeless Ready, 6-bolt, 110 x 20 mm Boost thru axle Rear : Bontrager Line DH 30, Tubeless Ready, Rapid Drive 108, 6-bolt, Shimano 7 speed freehub, 157 x 12 mm thru axle

Front	Tektro alloy linear-pull brakes, Tektro adjustable-reach alloy levers	SRAM Code R 4-piston hydraulic disc Brake Rotor : SRAM CenterLine, 6-bolt, round edge, 180 mm
Rear	Tektro alloy linear-pull brakes, Tektro adjustable-reach alloy levers	SRAM Code R 4-piston hydraulic disc Brake Rotor : SRAM CenterLine, 6-bolt, round edge, 200 mm

Front	--	--
Rear	--	--

Colors

Matte Metallic Gunmetal

Satin Trek Black

Length	--	--
Weight	--	17.68 kg

Features	--	- Rock the mullet - Active Braking Pivot - Suspension Calculator
Additional Details	Bottom Bracket : Sealed cartridge	Shock : Size : R1 - Fox VAN Performance, 400lb spring, 250 x 72.5 mm Size : R2 - Fox VAN Performance, 450lb spring, 250 x 72.5 mm Size : R3 - Fox VAN Performance, 500lb spring, 250 x 72.5 mm