Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2 vs Trek Session 8 29 GX

Compare Specifications of Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2 and Trek Session 8 29 GX

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Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2
Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2

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Trek Session 8 29 GX
Trek Session 8 29 GX

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Technical Specifications
Load Carrying Capacity -- Combined weight of bicycle, rider, and cargo of 300 pounds (136 kg)
Frame S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc 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 Roval Rapide Cockpit, Integrated Bar/Stem Bontrager Line Pro, 35 mm, Direct Mount, 50 mm length
Handle Bar Roval Rapide Cockpit, Integrated Bar/Stem Bontrager Line, alloy, 35 mm, 27.5 mm rise, 780 mm width
Fork -- RockShox Boxxer Select, DebonAir spring, Charger RC damper, 46 mm offset, 20 x 110 mm Boost thru axle, 200 mm travel
Seatpost S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset Bontrager Rhythm Elite, 31.6 mm, 0 mm offset, 330 mm length
Grip Supacaz Super Sticky Kush Bontrager XR Trail Elite, nylon lock-on
Crankset Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision Pro dual-sided powermeter Truvativ Descendant DH, DUB 83, 34T steel ring, 165 mm length
Pedals -- Wellgo BO-87B, alloy body, Cro-Mo axle, replaceable pins
Chain Shimano Dura-Ace, 12-speed SRAM PC-1110, 11 speed
Shifters -- SRAM GX DH, 7 speed
Saddle Body Geometry S-Works Power, carbon fiber rails, carbon fiber base Bontrager Arvada, hollow chromoly rails, 138 mm width
Derailleur Front Shimano Dura-Ace R9250, braze-on --
Derailleur Rear Shimano Dura-Ace R9250, 12-speed SRAM GX DH, medium cage
Cassette Shimano Dura-Ace, 12-speed, 11-30t SRAM PG-720, 11-25, 7 speed
Chainrings 52/36T --
Bottom Bracket Shimano Dura-Ace, BB-R9200 SRAM DUB, 83 mm, BSA threaded
Tyres
Front S-Works Turbo Rapidair 2BR, 700x26mm Bontrager G5 Team Issue, wire bead, 2-ply 60tpi, 29 x 2.50''
Rear S-Works Turbo Rapidair 2BR, 700x26mm Bontrager G5 Team Issue, wire bead, 2-ply 60tpi, 29 x 2.50''
Wheel / RIM Front: Roval Rapide CLX II, Tubeless, 21mm internal width carbon rim, 51mm depth, Win Tunnel Engineered, Roval AFD hub, 18h, DT Swiss Aerolite spokes
Rear: Roval Rapide CLX II, Tubeless, 21mm internal width carbon rim, 60mm depth, Win Tunnel Engineered, Roval AFD hub, 24h, DT Swiss Aerolite spokes
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
Tube Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve --
Brakes
Front Shimano Dura-Ace R9270, hydraulic disc SRAM Code R 4-piston hydraulic disc
Brake Rotor : SRAM CenterLine, 6-bolt, round edge, 180 mm
Rear Shimano Dura-Ace R9270, hydraulic disc SRAM Code R 4-piston hydraulic disc
Brake Rotor : SRAM CenterLine, 6-bolt, round edge, 200 mm
Brake Lever Shimano Dura-Ace R9270, hydraulic disc --
Suspension
Front S-Works FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc --
Rear -- --
Colors Available
Colors Satin Fog Tint / Green Ghost Pearl / Red Ghost Pearl Fade
Satin Carbon / Viavi Cynan Blue / Viavi Silver-Blue Pearl Fade / Gloss Metallic White Silver
Satin Trek Black


Physical Specs
Length -- --
Weight 6.62 kg 17.68 kg
Overview
Features -- - Rock the mullet
- Active Braking Pivot
- Suspension Calculator
Additional Details -- 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

Which one do you think is better? And why?
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