Specialized Roubaix SL8 Comp 105 Carbon Road Bike
Shimano 105 Di2 12-speed shifting, an 11-36t cassette, and 50/34T chainrings equip the Specialized Roubaix SL8 Comp endurance road bike.
- The Future Shock 3.2 fork uses FACT carbon and thru-axle.
- Shimano 105 hydraulic disc brakes use 160mm rotors.
- DT Swiss G540 rims are tubeless ready with 24mm internal width.
- Mondo tires measure 700×32 front and rear on this build.
- Ready to Ride guarantee 100% Built.
- Safe International Doorstep Bike Shipping.
Description
Need electronic Di2 shifting and progressive road compliance on coarse pavement? The Specialized Roubaix SL8 Comp 105 Di2 carbon road bike delivers endurance performance with a FACT 10R carbon frame and a Future Shock 3.2 front suspension system. A 12-speed Shimano 105 Di2 electronic drivetrain provides wide-range gearing across hilly terrain.
This complete build features a Shimano 105 Di2 groupset (50/34T crankset, 11-36T cassette), Shimano 105 hydraulic disc brakes with 160mm rotors, DT Swiss G540 alloy wheels (24mm internal width), Mondo Folding 700×32 tires, Specialized Hover Comp alloy handlebar, and an S-Works Pave seatpost. Color options include Satin Solidity Metallic and Gloss Glacial Metallic, with pedals sold separately.
Key Specifications of the Specialized Roubaix SL8 Comp 105 Di2 Carbon Road Bike
- FACT 10R carbon frame incorporates FreeFoil Shape Library aerodynamic tubing.
- Future Shock 3.2 fork delivers tunable front-end vibration damping.
- Shimano 105 Di2 12-speed electronic drivetrain shifts an 11-36T cassette.
- Shimano 105 hydraulic disc brakes clamp 160mm rotors front and rear.
- DT Swiss G540 alloy wheels feature tubeless-ready 24mm inner rims.
- Specialized Mondo Folding 700×32 tires provide endurance road grip.
- Specialized Hover Comp alloy handlebar provides a comfortable upright posture.
- S-Works Pave carbon seatpost dampens seated road feedback.
- Size 56 complete bicycle weighs 8.76 kg or 19 pounds 5.0 ounces.
- Bottom bracket interface utilizes a Shimano threaded BSA shell.
Who This Endurance Road Bike Fits
Club riders, endurance enthusiasts, and cyclists seeking an accessible entry into electronic Di2 shifting will match this platform. The wide-range 11-36T cassette and Future Shock 3.2 system handle steep climbs and rough road surfaces with ease.
Build Considerations
The chassis features a standard Shimano BSA threaded bottom bracket, 12x100mm front and 12x142mm rear thru-axles, and flat-mount disc calipers. The hidden drop clamp binder secures the S-Works Pave seatpost, while internal channels guide electronic Di2 wiring.
Before Ordering the Specialized Roubaix SL8 Comp 105 Di2 Carbon Road Bike
Review rider height guidelines: 44 to 49 cm fits 155 to 163 cm (5’1″ to 5’4″), 52 cm fits 163 to 170 cm (5’4″ to 5’7″), 54 cm fits 170 to 175 cm (5’7″ to 5’9″), 56 cm fits 175 to 180 cm (5’9″ to 5’11”), 58 cm fits 180 to 188 cm (5’11” to 6’2″), and 61 cm fits 188 to 196 cm (6’2″ to 6’5″). Make sure you charge the Shimano Di2 battery and acquire clipless road pedals before delivery.
Specialized Roubaix SL8 Comp 105 Di2 Specs
| Brand | Specialized |
| Model | Roubaix SL8 Comp 105 Di2 |
| Bike Type | Endurance Road Bike |
| Color | Satin Solidity Metallic, Gloss Glacial Metallic |
| Frame | FACT 10R, Rider First Engineered, FreeFoil Shape Library tubes, threaded BB, 12x142mm thru-axle, flat-mount disc |
| Fork | Future Shock 3.2 w/ Smooth Boot, FACT Carbon 12x100mm, thru-axle, flat-mount disc |
| Front Brake | Shimano 105 hydraulic disc, 160mm |
| Rear Brake | Shimano 105 hydraulic disc, 160mm |
| Shift Levers | Shimano 105 Di2 R7170, 12-speed hydraulic disc |
| Front Derailleur | Shimano 105 Di2 R7150, braze-on |
| Rear Derailleur | Shimano 105 Di2 R7150 |
| Cassette | Shimano 105 R7100, 12-speed, 11-36t |
| Chain | Shimano SLX CN-M7100, 12-speed |
| Crankset | Shimano 105, 12-speed, 50/34T |
| Bottom Bracket | Shimano Threaded BSA BB |
| Front Wheel | DT Swiss G540 rim, 24mm 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 G540 rim, 24mm 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 Tire | Mondo Folding Endurance Tire, 700x32, GRIPTON T5 |
| Rear Tire | Mondo Folding Endurance Tire, 700x32, GRIPTON T5 |
| Inner Tubes | 700x28-38mm, 48mm Presta valve |
| Stem | Future Stem, Comp |
| Handlebars | Specialized Hover Comp, Alloy, 125mm drop, 75mm reach w/ Di2 hole |
| Tape | Supacaz Super Sticky Kush |
| Saddle | Body Geometry Power Sport, steel rails |
| Seatpost | S-Works Pave |
| Seat Binder | Hidden drop clamp |
| Product ID | 221824 |
| Weight | 8.76 kg / 19 lb 5.0 oz, size 56 |
| Manufacturer Warranty | Frame and fork are covered by a lifetime warranty for the original owner. Other Specialized-branded parts are covered for 2 years. |
Specialized Roubaix SL8 Comp 105 Di2 Included:
- Shimano 105 Di2 EW-EC300 electronic shifting battery charging cable.
- Future Shock 3.2 front suspension setup accessories and booster spring pack.
- S-Works Pave carbon seatpost and frame clamp wedge mechanism.
- Tubeless valve stems and pre-installed tubeless-ready rim tape.
- Shimano 105 hydraulic disc brake pad transport spacers.
- Safety reflector set and compact bicycle bell.
- Bicycle User Manual Book.
- Official Manufacturer Warranty Card.
Specialized Roubaix SL8 Comp 105 Carbon Road Bike General Questions
Q: What surface conditions suit the Roubaix SL8 Comp 105?A: The Specialized Roubaix SL8 Comp 105 Carbon Road Bike suits cracked pavement, rolling countryside roads, and all-day endurance rides with 12-speed Shimano 105 Di2 electronic shifting.
A: Charge the internal seatpost battery through the rear derailleur port every 1,500 miles, clean the 11-34T cassette, and use the Shimano E-Tube app for customized button shifting.
A: Located inside the steerer tube above the head tube, the cartridge delivers 20 mm of vertical travel to cushion handlebars without altering the bicycle's wheelbase or handling geometry.
A: High-modulus carbon construction reduces frame weight by 50 grams while integrating top-tube bento box mounts, fender mounts, and 40 mm tire clearance.
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