Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2 vs Trek Emonda ALR 4 Disc

Compare Specifications of Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2 and Trek Emonda ALR 4 Disc

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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 Emonda ALR 4 Disc
Trek Emonda ALR 4 Disc

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Technical Specifications
Frame S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc Ultralight 300 Series Alpha Aluminum, Invisible Weld technology, tapered head tube, Control Freak internal routing, DuoTrap S compatible, flat mount disc
Stem Roval Rapide Cockpit, Integrated Bar/Stem Bontrager Elite, 31.8 mm, Blendr compatible, 7 degree
Handle Bar Roval Rapide Cockpit, Integrated Bar/Stem Bontrager Comp VR-C, alloy
Fork -- Emonda SL full carbon, tapered carbon steerer, internal brake routing, flat mount disc
Seatpost S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset Bontrager Approved, alloy
Grip Supacaz Super Sticky Kush Bontrager Supertack Perf tape
Crankset Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision Pro dual-sided powermeter Shimano Tiagra 4700
Chain Shimano Dura-Ace, 12-speed Shimano Tiagra HG54, 10 speed
Shifters -- Shimano Tiagra R4725, short reach lever, 10 speed
Saddle Body Geometry S-Works Power, carbon fiber rails, carbon fiber base Bontrager Montrose Comp
Headset -- FSA Integrated, sealed cartridge bearing, 1-1/8 top, 1.5 bottom
Derailleur Front Shimano Dura-Ace R9250, braze-on Shimano Tiagra 4700, braze-on
Derailleur Rear Shimano Dura-Ace R9250, 12-speed Shimano Tiagra 4700, long cage
Hub Front -- Bontrager alloy, sealed bearing, centerlock disc
Hub Rear -- Bontrager alloy, sealed bearing, centerlock disc
Spoke -- 14 g stainless steel
Cassette Shimano Dura-Ace, 12-speed, 11-30t Shimano Tiagra HG500, 12-28, 10 speed
Chainrings 52/36T 50 / 34 T
Bottom Bracket Shimano Dura-Ace, BB-R9200 --
Tyres
Front S-Works Turbo Rapidair 2BR, 700x26mm Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700 x 25 c
Rear S-Works Turbo Rapidair 2BR, 700x26mm Bontrager R1 Hard-Case Lite, wire bead, 60 tpi, 700 x 25 c
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
Bontrager Affinity Disc, Tubeless Ready, 24-hole, 21 mm width, Presta valve
Tube Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve --
Brakes
Front Shimano Dura-Ace R9270, hydraulic disc --
Rear Shimano Dura-Ace R9270, hydraulic disc --
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
Matte/Gloss Trek Black


Physical Specs
Length -- --
Weight 6.62 kg --
Overview
Features -- --
Additional Details -- Axles
Front : 12 x 100 mm thru-axle
Rear : 12 x 142 mm thru-axle
Bottom Bracket : Shimano BB71, 86.5 mm, PressFit

Which one do you think is better? And why?
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