Decision tool

Compare bikes using the facts

Compare up to three bikes: actual components, measurable differences, geometry in your chosen size and current HPM Sport offers.

Add bike 2

Only bikes with a valid HPM offer and linked specifications are included.

2 available spaces

Typing narrows the results. A bike is only added when you select a specific result.

No other comparable bike matches your search.

Available bikes

Specialized · MY 2026

Tarmac SL8 Comp - Shimano 105 Di2

107,890 CZK

Check availability

Weight: 7.68 kg
Motor: Not stated
Battery: Not stated
Travel front/rear: Not stated

Choose size and buy

measurable advantage weaker value difference without a verdict

Differences only · on

There are no differences in the published specifications: both bikes have identical values for every compared item.

Specifications	Specialized Tarmac SL8 Comp - Shimano 105 Di2
Frame
Frame	Tarmac SL8 FACT 10r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
Seat clamp	Tarmac integrated wedge
Suspension
Forks	FACT 10r Carbon, 12x100mm thru-axle, flat-mount disc
Brakes
Front brake	Shimano 105 Hydraulic Brake
Rear brake	Shimano 105 Hydraulic Brake
Motor
Drivetrain	Shimano 105 Di2 R7170, 12-speed hydraulic disc
Front derailleur	Shimano 105 R7170, braze-on
Rear derailleur	Shimano 105 Di2 R7150. 12-speed
Cassette	Shimano 105 CS-R7100, 12-speed, 11-34t
Chain	Shimano SLX CN-M7100, 12-speed
Crankset	Shimano 105 R7100, 52/36t
Bottom bracket	Shimano Threaded BSA BB
Wheels and tyres
Front wheel	DT Swiss R470 rim, 20mm internal width, tubeless ready, 24h, Specialized full sealed bearing thru axle hub, centerlock disc, DT Swiss Champion 14G stainless steel spokes, DT Swiss brass nipples.
Rear wheel	DT Swiss R470 rim, 20mm internal width, tubeless ready, 24h, Specialized full sealed bearing thru axle hub, centerlock disc, DT Swiss Champion 14G stainless steel spokes, DT Swiss brass nipples.
Front tyre	S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm
Rear tyre	S-Works Turbo, 120 TPI, folding bead, BlackBelt protection, 700x26mm
Inner tubes	Turbo Ultralight, 48mm Presta valve
Cockpit and contact points
Stem	Tarmac integrated stem, 6-degree
Handlebars	Specialized Shallow Drop, 6061, 70x125mm, 31.8mm clamp
Grips and bar tape	Supacaz Super Sticky Kush
Saddle	Body Geometry Power Sport, steel rails
Seatpost	S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
Accessories
SWAT	Stem headset spacers kit for SL7 stem & Roval Rapide cockpit use
Weight
Weight	7.68 kg
Weight for size	56

Same size, fair comparison

Geometry by size

Geometry differences only

Geometry on the bike Hover over a table row — or tap it — and the dimension is drawn on the bike.

There are no differences for the selected sizes: their geometry is identical.

Dimension	Tarmac SL8 Comp - Shimano 105 Di2 54
	172.5mm
Handlebar width mm	420mm
	100mm
Šířka sedla	143mm
	380mm
	544mm
	384mm
	552mm
	381mm
	137mm
	73°
	268mm
	72mm
	58mm
	370mm
	44mm
	579mm
	410mm
	978mm
	541mm
	768mm
	473mm
	74°

The first bike is the reference for the sign of each difference. Green and red are used only where the direction is meaningful: lower weight and higher published electric motor output. Dimensions, travel, capacity, crank length and price are differences without an automatic verdict. “—” means the manufacturer has not published the value. We show weights in kilograms; the manufacturer’s values in pounds are not displayed.

Add bike 2

Tarmac SL8 Comp - Shimano 105 Di2

Geometry by size

Bikes, spare parts and equipment