Jamis Boss 7 Step-Over vs Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2

Compare Specifications of Jamis Boss 7 Step-Over and Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2

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Jamis Boss 7 Step-Over
Jamis Boss 7 Step-Over

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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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Model:

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Technical Specifications
Frame Diamond frame design with 6061 aluminum oversized tubing, sloping top tube design, water bottle bosses, alloy kickstand, and painted steel chainguard S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
Stem Alloy hi-rise, 180mm quill, 100mm extension, with removeable 2-bolt cap Roval Rapide Cockpit, Integrated Bar/Stem
Handle Bar Jamis Cruise-control comfort bar Roval Rapide Cockpit, Integrated Bar/Stem
Fork Oversized hi-tensile steel tubular unicrown with leading dropout and fender boss --
Seatpost Alloy micro-adjust, 27.2 x 300mm, with 31.8mm alloy clamp and cromo seatpin S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
Grip -- Supacaz Super Sticky Kush
Crankset Forged alloy crank, 170mm alloy, with 44T compact disc chainring Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision Pro dual-sided powermeter
Pedals Cruiser platform with grip tape --
Chain KMC Z51NP, silver Shimano Dura-Ace, 12-speed
Shifters Shift levers : Shimano RevoShift RS-35, 7-speed --
Saddle Boss Cruiser design with extra padding and heavy-duty, double-loop springs Body Geometry S-Works Power, carbon fiber rails, carbon fiber base
Headset Internal cup, threaded, 1 1/8” --
Derailleur Front -- Shimano Dura-Ace R9250, braze-on
Derailleur Rear Shimano TY-300 rear Shimano Dura-Ace R9250, 12-speed
Spoke 14 gauge stainless steel spokes --
Cassette Shimano, 14-28, 7- Speed Shimano Dura-Ace, 12-speed, 11-30t
Chainrings -- 52/36T
Bottom Bracket Sealed cartridge, 68 x 122.5mm Shimano Dura-Ace, BB-R9200
Tyres
Front CST Metropolitan Palm Bay, 26" x 2.35 S-Works Turbo Rapidair 2BR, 700x26mm
Rear CST Metropolitan Palm Bay, 26" x 2.35 S-Works Turbo Rapidair 2BR, 700x26mm
Wheel / RIM Alex Y303 36H black anodized alloy rims with alloy nutted hubs 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
Tube -- Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve
Brakes
Front Tektro alloy linear pull brake with Tektro CL530 alloy levers Shimano Dura-Ace R9270, hydraulic disc
Rear Tektro alloy linear pull brake with Tektro CL530 alloy levers 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 Blue Lagoon
Raspberry
Vanilla Mint
Satin Fog Tint / Green Ghost Pearl / Red Ghost Pearl Fade
Satin Carbon / Viavi Cynan Blue / Viavi Silver-Blue Pearl Fade / Gloss Metallic White Silver


Physical Specs
Length -- --
Weight 14.9 kg 6.62 kg
Overview
Features -- --
Additional Details Sizes : M: 17”, 19”, 21”, 23” S/O: 14”, 18” --

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