Roubaix SL4 Expert Ui2 Compact
Part No.  

Roubaix SL4 Expert Ui2 Compact

Part No.  37827
The smoother, faster Roubaix SL4 Expert Ui2 features a super light and stiff FACT 10r carbon frame with tapered head tube, Zertz vibration dampers, and full internal cable routing—the same design that Tom Boonen rode to win the 2012 Paris-Roubaix. Equipped with Shimano Ultegra Ui2 components, and DT Axis 4.0 wheels.
  • Shimano Ultegra compact crankset for legendary shifting performance
  • Specialized Expert shallow drop alloy bar for serious performance, wrapped with non-slip Specialized Roubaix tape for vibration-damping
  • Specialized FACT IS 10r carbon SL4 frame with Zertz is the fastest and smoothest endurance bike available, with size specific engineering, tapered headtube, ultra lightweight.
  • All-new Specialized FACT carbon fork with Zertz has size-specific engineering that creates a more balanced and stable ride for riders of different sizes
  • Shimano Ultegra Di2 10-speed electronic shifters for precise, hassle-free shifting, while Shimano Ultegra compact crankset keeps shifting butter smooth and laser accurate
  • Specialized Roubaix Pro 120 TPI tire has 23mm tread handles quick and fast while the 25c casing smooths our ride and keeps you fresh longer
  • Minimalist, high-performance Body Geometry Toupe RBX saddle with hollow Cr-Mo rails, flat profile and generous padding, partnered with FACT carbon Comp seatpost to absorb road vibrations

Technical Specifications

CHAIN Shimano Tiagra 10-speed
BOTTOM BRACKET OS integrated, sealed bearings
CRANKSET Shimano Ultegra compact
FRONT DERAILLEUR Shimano Ultegra Di2
SHIFT LEVERS Shimano Ultegra Di2
CASSETTE Shimano Tiagra, 10-speed, 11-28
REAR DERAILLEUR Shimano Ultegra Di2
INNER TUBES Lightweight, presta
FRONT TIRE Specialized Roubaix Pro, BlackBelt, 120TPI, aramid bead, 700x25c
REAR TIRE Specialized Roubaix Pro, BlackBelt, 120TPI, aramid bead, 700x25c
SADDLE Body Geometry Toupé RBX Comp, hollow Cr-Mo rails, 143mm
TAPE Specialized Roubaix tape w/ 2.5 gel pads
SEATPOST Specialized Comp, FACT carbon, 27.2mm
STEM Specialized Comp-Set 6061 alloy, cone head bolt, 12-degree, 4-degree shim, 31.8mm
HANDLEBARS Specialized Expert alloy, shallow drop
FRONT BRAKE Shimano Ultegra
REAR BRAKE Shimano Ultegra
PEDALS Nylon flat test ride, loose ball, w/ reflectors
HEADSET 1-1/8"" upper and size specific lower stainless steel cartridge bearings, 20mm carbon cone spacer and 20mm of carbon spacers
SEAT BINDER Forged bolt and nut, 32.6mm
FORK Roubaix size specific, FACT carbon full monocoque, Zertz
FRAME Specialized FACT 10r carbon, FACT IS construction, tapered/shaped 1-1/8"" to size specific lower HT, compact race design, Zertz, internal cable routing, threaded BB


Geometry Chart

- Geometry

Stem Length 75mm 90mm 100mm 100mm 110mm 110mm 120mm
Crank Length 170mm 170mm 172.5mm 172.5mm 175mm 175mm 175mm
Handle-Bar Width 400mm 420mm 420mm 420mm 440mm 440mm 440mm
Wheelbase 983mm 989mm 1000mm 1010mm 1029mm 1038mm 1053mm
Seat-Tube Length, B-B Center to Top 445mm 475mm 495mm 515mm 540mm 565mm 600mm
Head-Tube Length 125mm 145mm 165mm 190mm 225mm 245mm 260mm
Top-Tube Length, Horizontal 518mm 537mm 548mm 565mm 582mm 600mm 615mm
Front-Center 582mm 588mm 595mm 606mm 621mm 628mm 643mm
Head-Tube Angle 72° 72° 72° 72.5° 72.5° 73° 73°
Fork Rake 49mm 49mm 49mm 49mm 49mm 49mm 49mm
Trail 59mm 59mm 59mm 56mm 56mm 53mm 53mm
Stand-Over Height 730mm 756mm 776mm 798mm 829mm 851mm 877mm
Chain-Stay Length 412mm 412mm 415mm 415mm 418mm 420mm 420mm
Seat-Tube Angle 75.5° 74° 73.5° 73.25° 73° 72.5° 72.5°
B-B Drop 73mm 73mm 71.5mm 71.5mm 70mm 70mm 70mm
Seat-Post Length 300mm 350mm 350mm 350mm 350mm 350mm 350mm