Velopedia Bicycle Archive
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Compare published geometry, gearing and specifications for up to three bicycles.
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Evidence-backed comparison
Meaningful differences
Prioritized by consequence. Small differences remain in the complete table below, and missing specifications are never treated as equal.
- Gearing
2026 Cervelo Soloist Ultegra Di2 has a 12% lower climbing ratio than 2026 Specialized Tarmac SL8 Pro - Shimano Ultegra Di2.
Selected-size geometry
Geometry overlay
Published coordinates from each selected size set the shared scale and bottom-bracket anchor. Manufacturer size labels are shown as published and are not normalized fit equivalents. When a frame outline needs a neutral construction aid because a tube length was not published, it is disclosed below the overlay.
Published drivetrain range
Gearing comparison
Mechanical ratio is chainring teeth divided by rear sprocket teeth. Lower ratios provide more mechanical advantage; higher ratios turn the rear wheel farther per crank revolution.
Lowest1.06:1
Highest4.73:1
Total range446%
7.6–33.9 mph at 90 rpm, estimated from the published rear tire size 700×29c · 29-622 ETRTO.
Lowest1.20:1
Highest4.73:1
Total range394%
8.6–33.8 mph at 90 rpm, estimated from the published rear tire size 700×28c · 28-622 ETRTO.
The bar compares mechanical ratio only. Wheel-dependent speed is shown only when an exact published ISO/ETRTO rear tire size is available; no tire size is assumed.
Complete specification tableOnly rows containing Archive data are shown. Swipe the table horizontally on smaller screens.
Specification
2026 Cervelo Soloist Ultegra Di2
2026 Specialized Tarmac SL8 Pro - Shimano Ultegra Di2
Overview
Model Year
2026
2026
Brand
Cervelo
Specialized
Model
Soloist Ultegra Di2
Tarmac SL8 Pro - Shimano Ultegra Di2
Bicycle Type
Road
Road
Original MSRP
$8,250.00
$8,499.99
Colors
Black Magic, Cloud Break
Gloss Dolomite Metallic / Nebula Metallic, Gloss Red Sky / Chrome
Sizes
48, 51, 54, 56, 58, 61
44, 49, 52, 54, 56, 58, 61
Weight
7.17 kgs
7.25 kg (15 lb, 15.7 oz)
Frameset
Frame Construction
—
Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
Frame Material
—
Carbon Fiber
Fork
Cervélo All-Carbon, Tapered Soloist Fork
FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc
Fork Material
Carbon Fiber
Carbon Fiber
Drivetrain
Shifters
Shimano Ultegra, R8170
Shimano Ultegra Di2 R8170, hydraulic disc
Front Derailleur
Shimano Ultegra, R8150
Shimano Ultegra Di2 R8150, braze-on
Rear Derailleur
Shimano Ultegra, R8150
Shimano Ultegra Di2 R8150, 12-speed
Crankset
Shimano Ultegra, R8100, 52/36T
Shimano Ultegra R81000 with 4iiii Precision 3+ Power Meter, 52/36t
Bottom Bracket
FSA, T47 BBright for 24mm spindle
Shimano Threaded BSA BB
Cassette
Shimano Ultegra, R8100, 11-34T, 12-Speed
Shimano Ultegra, 12-speed, 11-30t
Chain
Shimano M8100
Shimano XT CN-M8100, 12-speed
Brakes
Brakes
Brake controls: Shimano Ultegra, R8170; Rotors: Shimano CL800 Centerlock
(F) Shimano Ultegra BR-R8170 hydraulic disc / (R) Shimano Ultegra BR-R8170 hydraulic disc
Cockpit & Contact Points
Headset
FSA IS2 1-1/4, 45° x 45° / 1-1/2, 36° x 45°
Stem headset spacers kit for SL7 stem & Roval Rapide cockpit use
Handlebar
Cervélo HB18 Carbon
Roval Rapide Cockpit, Integrated Bar/Stem
Saddle
Fizik Arione R3
Power Pro Mirror, Hollow Ti rails
Seatpost
Cervélo SP27 Carbon
S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
Wheels & Tires
Wheels
Front: Reserve 42TA, DT Swiss 350, 12x100mm, 24H, centerlock, tubeless compatible; Rear: Reserve 49TA, DT Swiss 350, 12x142mm, HG freehub 24H, centerlock, tubeless compatible
(F) Roval Rapide CL III, Tubeless, 21mm internal width carbon rim, 51mm depth, Win Tunnel Engineered, DT350 hub, 18h, DT Swiss Competition Race Straight Pull Spokes / (R) Roval Rapide CL III, Tubeless, 21mm internal width carbon rim, 48.5mm depth, Win Tunnel Engineered, DT350 hub, 24h, DT Swiss Competition Race Straight Pull Spokes
Front Tire
Vittoria Corsa N.EXT TLR G2.0 700x29c
S-Works Turbo TLR Race Tire, 700x28c
Rear Tire
Vittoria Corsa N.EXT TLR G2.0 700x29c
S-Works Turbo TLR Race Tire, 700x28c
Geometry · choose a size for each bicycle
Geometry size
Reach
383.3 mm
384 mm
Stack
544.6 mm
544 mm
Effective top tube
—
541 mm
Head-tube angle
73°
73°
Seat-tube angle
73.5°
74°
Seat tube
—
473 mm
Head tube
132 mm
137 mm
Chainstay / rear center
410 mm
410 mm
Wheelbase
978 mm
978 mm
Bottom-bracket drop
74 mm
72 mm
Bottom-bracket height
—
268 mm
Standover height
773.8 mm
768 mm
Fork offset / rake
46 mm
44 mm
Front center
579.5 mm
579 mm
Trail
57.3 mm
58 mm
Wheel size
700c
—
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.