Specialized · Roubaix

Roubaix SL8 Expert - Shimano Ultegra Di2

2026

$5,999.99

Manufacturer price · US market. Not a local price.

Specialized Roubaix SL8 Expert - Shimano Ultegra Di2
Specialized Hover ExpertHandlebar
Body Geometry Power ExpertSaddle
FACT 10RFrame
Future ShockFork
Shimano Ultegra R8100Brakes
Shimano Ultegra R8150 · 12 speedsDrivetrain
Mondo TLR Endurance TireTyres

Tap a number to see the part.

Specialized Hover Expert

Handlebar

The handlebar and stem are where your hands steer the bike. Their width and length set how upright or stretched out you sit.

Body Geometry Power Expert

Saddle

The saddle and seatpost carry your weight. The height of the seatpost sets your pedalling position.

FACT 10R

Frame

The frame is the bike's backbone: every other part is fixed to it. Its material and shape decide its weight and how it feels to ride.

Future Shock

Fork

The fork holds the front wheel. A suspension fork absorbs bumps at the front; its travel is how far it can compress.

Shimano Ultegra R8100

Brakes

Brakes slow the bike. Disc brakes squeeze a rotor fixed to the wheel hub; rim brakes squeeze the wheel rim itself.

Shimano Ultegra R8150 · 12 speeds

Drivetrain

The drivetrain turns your pedalling into motion: the cranks, the chain, the cassette and the derailleur that changes gear.

Mondo TLR Endurance Tire

Tyres

Tyres are the bike's only contact with the ground. Their width and tread decide grip, comfort and rolling speed.

© Specialized Bicycle Components

Equipment

Partial coverageChecked: August 25, 2026Manufacturer page
Rear derailleur brand
Shimano
Source text
  • “Shimano Ultegra R8150, 12-speed” — Rear Derailleur
Front brake brand
Shimano
Source text
  • “Shimano Ultegra R8100, hydraulic brake” — Front Brake
Rear brake brand
Shimano
Source text
  • “Shimano Ultegra R8100, hydraulic brake” — Rear Brake
Front wheel brand
Roval
Source text
  • “Roval C38, 21mm internal width carbon rim” — Front Wheel
Rear wheel brand
Roval
Source text
  • “Roval C38, 21mm internal width carbon rim, tubeless ready” — Rear Wheel
Cassette speeds
12
Source text
  • “Shimano Ultegra CS-R8100, 12-speed, 11-34t” — Cassette
Cassette teeth
11/34
Source text
  • “Shimano Ultegra CS-R8100, 12-speed, 11-34t” — Cassette
Chainring teeth
50/34
Source text
  • “Shimano Ultegra R8100, 50/34t” — Crankset
Bike weight
8.17 kgSize: ⁨56⁩
Source text
  • “8.17 kg (18 lb, 0.2 oz)” — Weight
  • “56” — Weight Size

Components

Frame
FACT 10R, Rider First Engineered™ (RFE), FreeFoil Shape Library tubes, threaded BB, 12x142mm thru-axle, flat-mount disc
Crank length44
165mm
Crank length49
165mm
Crank length52
170mm
Crank length54
172.5mm
Crank length56
172.5mm
Crank length58
175mm
Crank length61
175mm
Crank length64
175mm
Fork
Future Shock 3.2 w/ Smooth Boot, FACT Carbon 12x100mm, thru-axle, flat-mount disc
Handlebar width44
360mm
Handlebar width49
380mm
Handlebar width52
400mm
Handlebar width54
420mm
Handlebar width56
420mm
Handlebar width58
440mm
Handlebar width61
440mm
Handlebar width64
440mm
Front brake
Shimano Ultegra R8100, hydraulic brake
Stem length44
70mm
Stem length49
80mm
Stem length52
90mm
Stem length54
100mm
Stem length56
100mm
Stem length58
110mm
Stem length61
110mm
Stem length64
120mm
Rear brake
Shimano Ultegra R8100, hydraulic brake
Saddle width44
155mm
Saddle width49
155mm
Saddle width52
155mm
Saddle width54
143mm
Saddle width56
143mm
Saddle width58
143mm
Saddle width61
143mm
Saddle width64
143mm
Shift levers
Shimano Ultegra Di2 R8170, hydraulic disc
Seatpost length44
380mm
Seatpost length49
380mm
Seatpost length52
380mm
Seatpost length54
380mm
Seatpost length56
380mm
Seatpost length58
450mm
Seatpost length61
450mm
Seatpost length64
450mm
Front derailleur
Shimano Ultegra Di2 R8150, braze-on
Rear derailleur
Shimano Ultegra R8150, 12-speed
Cassette
Shimano Ultegra CS-R8100, 12-speed, 11-34t
Chain
Shimano XT CN-M8100, 12-speed
Crankset
Shimano Ultegra R8100, 50/34t
Bottom bracket
Shimano Threaded BSA BB
Front wheel
Roval C38, 21mm internal width carbon rim
Front tyre
Mondo TLR Endurance Tire, 700x32, GRIPTON T2/T5
Rear tyre
Mondo TLR Endurance Tire, 700x32, GRIPTON T2/T5
Rear wheel
Roval C38, 21mm internal width carbon rim, tubeless ready
Inner tubes
700x28-38mm, 48mm Presta valve
Stem
Future Stem, Pro
Handlebar
Specialized Hover Expert, Alloy, 125mm Drop, 75mm Reach w/Di2 Hole
Grips
Supacaz Super Sticky Kush
Saddle
Body Geometry Power Expert
Seatpost
S-Works Pave
Seatpost clamp
Hidden drop clamp
Product ID
221822
Weight
8.17 kg (18 lb, 0.2 oz)
Size used for weighing
56

Geometry

Frames drawn: Specialized Roubaix SL8 Expert - Shimano Ultegra Di2 · 44.
Specialized Roubaix SL8 Expert - Shimano Ultegra Di2 · 44
Measure4449525456586164
543 mm549 mm566 mm585 mm605 mm630 mm665 mm685 mm
353 mm363 mm370 mm381 mm389 mm397 mm403 mm409 mm
90 mm90 mm105 mm122 mm140 mm168 mm202 mm222 mm
69.3°70.8°71.5°72.3°73°73°73.5°73.5°
269 mm269 mm269 mm270 mm270 mm271 mm271 mm271 mm
80 mm80 mm80 mm78 mm78 mm78 mm78 mm78 mm
Trail76 mm66 mm62 mm61 mm57 mm57 mm54 mm54 mm
Fork Length (full)375 mm375 mm375 mm375 mm375 mm375 mm375 mm375 mm
52 mm52 mm52 mm47 mm47 mm47 mm47 mm47 mm
589 mm587 mm593 mm598 mm604 mm620 mm631 mm634 mm
418 mm418 mm418 mm420 mm420 mm423 mm423 mm423 mm
994 mm992 mm998 mm1,005 mm1,012 mm1,031 mm1,042 mm1,054 mm
503 mm523 mm534 mm550 mm569 mm584 mm600 mm618 mm
Standover686 mm719 mm747 mm766 mm787 mm809 mm847 mm865 mm
365 mm410 mm446 mm465 mm485 mm505 mm545 mm581 mm
75°74°74°74°73.5°73.5°73.5°73°

Similar bikes

Similar bicycles: same category and type, comparable US MSRP

How we choose
  • Same category and electric or non-electric type
  • US MSRP ratio no greater than 1.3
  • Other families, ordered by price and stack/reach proximity

Manufacturer suggested retail prices are for the US market in USD. They are not local retail prices.

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