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Thursday, September 14, 2023

Specialised Roubaix SL8 Provides Future Shock 3.0 & AfterShock Seatpost Flex

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Nicely, it’s not the interrupted seatpost design we noticed some time again (that one grew to become the Sirrus commuter bike), however the brand new Roubaix guarantees a heavenly experience when it’s hell on the bottom.

In comparison with the prior era Roubaix that launched in 2019 with Future Shock 2.0, the brand new Roubaix SL8 seems related however upgrades to Future Shock 3.0 and is lighter and smoother total. And so they say it’s extra aero than something in its class, so it’s quicker, too. Right here’s how:

Future Shock 3.0 & AfterShock

specialized roubaix SL8 closeup on future shock
All photographs c. Specialised

The newest Future Shock nonetheless has 20mm of journey, however permits it to be tuned for any rider weight. Three springs -firm, medium, and soft- can be found, and as much as 5 preload spacers can be utilized to tune it much more. And so they say it’s simple to do in only a few minutes, no extra sophisticated than eradicating your stem.

This implies lighter riders will get extra profit, and heavier riders gained’t must crank up the preload. They are saying it reduces influence forces reaching the bar by as much as 53%, however there’s extra…three totally different variations are provided:

  • The bottom mannequin 3.1 permits the inner tuning and is undamped (Sport & Base fashions)
  • 3.2 provides damping, however maintains inside tuning solely (Knowledgeable & Comp fashions)
  • Future Shock 3.3 provides exterior compression damping adjustment so you possibly can tweak it whereas using (S-Works & Professional fashions)

The three.2 and three.3 Future Shocks can be out there aftermarket for individuals who wish to improve later. It’s more durable, too, with a thicker boot and extra seals to maintain water and mud out.

specialized roubaix SL8 seatpost flex diagram

For the rear, they went with an easier resolution than the (very efficient) suspension system employed by the Diverge. The AfterShock design makes use of their versatile Pavé seatpost to supply loads of rearward flex, aided by a dropped clamping mechanism that permits the submit to be an extended lever.

specialized roubaix SL8 closeup on aftershock seatpost

The higher a part of the seat tube is deeper than the remainder, making room for a recessed wedge to clamp the submit 65mm decrease than regular. Meaning 65mm extra submit to flex, which implies extra journey on the saddle. Right here’s a video exhibiting it in motion:

Lighter & extra aero body

specialized roubaix SL8 geometry comparison with SL7

The body seems related, however the seatstays sit a bit decrease, the downtube is a bit deeper, and the top tube will get a slimmer hourglass determine.

specialized roubaix SL8 closeup on head tube

The entrance finish’s updates proceed with a brand new fork form, too, and mixed it provides as much as a 4w drag financial savings. They are saying that’s good for 17.7 seconds saved over 100 miles, assuming you possibly can pump out 3 watts per kilogram.

The carbon layup borrows from the Aethos and, on increased finish fashions, will get 12r carbon to attain a 50g lighter body, even with wider tire clearance and extra mounts. They declare a painted 56cm body with out {hardware} is 828g, and full bike weights are:

  • S-Works = 7.3kg (FACT 12r)
  • Professional = 8.1kg (FACT 10r)
  • Knowledgeable = 8.6kg (FACT 10r)
  • Comp = 8.9kg (FACT 10r)
  • Sport = 8.9kg (FACT 10r)
  • Base = 9.46kg (FACT 10r)
specialized roubaix SL8 accessory mounts diagram

All fashions get three bottle cage mounts (one underneath the downtube), prime tube bag mounts, and fender mounts.

Tire clearance & geometry adjustments

specialized roubaix SL8 ridden on cobbles

Tire clearance bumps as much as 38-40mm tires, relying on tread sample. It’s nonetheless not a gravel bike, however for cobbles and “quick gravel” races like SBT GRVL, it is likely to be sufficient. It’s spec’d with their 32mm S-Works Mondo tires, however simply matches their 38mm Pathfinder tires, too…or a 28mm highway tire, which is the smallest they suggest on this bike.

The geometry solely sees one tweak – a bit longer attain, averaging 10mm throughout the dimensions vary. This pushes the entrance tire out extra for higher toe clearance when working bigger tires, and the match is definitely maintained by working a barely shorter stem.

Pricing and Specs

specialized roubaix SL8 S-Works
The brand new Specialised Roubaix SL8 S-Works.

Full bikes vary from $2,800 as much as $14,000 for the S-Works mannequin, with seven complete builds out there. Framesets use the highest degree FACT 12r carbon and are available in at 5,500.


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