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Ultra-Aero SL R - Enthusiast
Shimano Ultegra Di2

  1. $7,410
The bike that redefines speed. Born from a desire to do what’s never been done before, the ULTRA-AERO SL R delivers aerodynamic gains once thought impossible, making your fastest rides even faster. In its Enthusiast build, the ULTRA-AERO SL R is paired with Shimano’s Ultegra Di2 electronic groupset for fast, flawless shifting, lightning-fast Mavic Cosmic SL 65 carbon wheels and a race-proven Selle Italia SLR Boost saddle. The integrated ULTRA carbon cockpit completes this ground-breaking package, engineered to cut through the air and turn every watt into pure speed.
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Product code: BULTSLR8100DBLK

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  • "A trailblazer as a pure aero bike that is focused solely on speed"
    Rouleur
  • "An exceptionally fast and focused aero road bike"
    BikeRadar
DescriptionGroupsetWheelsetHandlebarsSaddleSizeGeometryFrequently Asked Questions

Description

The bike that redefines speed. Born from a desire to do what’s never been done before, it delivers aerodynamic gains once thought impossible, making your fastest rides even faster. In its Enthusiast build, the ULTRA-AERO SL R is paired with Shimano’s Ultegra Di2 electronic groupset for fast, flawless shifting, lightning-fast Mavic Cosmic SL65 carbon wheels and a race-proven Selle Italia SLR Boost saddle. The integrated ULTRA carbon cockpit completes this ground-breaking package, engineered to cut through the air and turn every watt into pure speed.

Groupset

Ultegra brings pro-level precision to every ride, with redesigned ergonomics for better braking control and the fastest, most reliable wireless shifting out there. Di2 delivers instant, accurate gear changes at the push of a button, every time. Featuring semi-compact 52/36 gearing for the ideal balance of speed on the flats and efficiency on climbs, you’re always in control, no matter the terrain.

Groupset

Wheelset

Wind-tunnel perfected to slice through the air and turn every watt into speed, the Cosmic SL 65 delivers aero efficiency for solo breakaways, all-out sprints, and flat-out triathlons. Its 65mm-deep, 19mm-wide NACA rim profile cuts drag and boosts crosswind stability for faster, smoother acceleration. Paired with Pirelli P Zero Road tyres that balance speed, grip, and durability, this setup rolls fast, stays tough, and impressively light.

Wheelset

Handlebars

Engineered for pure speed, the ULTRA-AERO bars are purpose-built for our fastest-ever aero bike. Their patented, next-generation design introduces a revolutionary wake-generating concept that reshapes airflow, creating a controlled pocket for the rider’s legs to sit within and reducing drag where it matters most. The aggressive, wing-shaped tops slice the air with scalpel-like precision, while the ergonomic drops and flat-top section deliver comfort and control on long rides or steep climbs. A textured finish removes the need for bar tape, keeping things clean, fast, and uncompromisingly aerodynamic.

Handlebars

Saddle

Built for pure aero performance, the ULTRA-AERO seatpost features a truncated aerofoil profile that cuts drag in the turbulent airflow behind the rider’s legs. Its composite shaft smooths out road buzz for a more comfortable, controlled ride, further enhanced by the Selle Italia SLR Boost saddle. Designed for all-out performance and long-distance comfort, the SLR’s neutral shape promotes efficient power transfer and complete freedom of movement.

Saddle

Size

To assist you in selecting the correct size, simply find your height on the graphic. It illustrates our recommendations so you can be confident that the size you order will be correct. If you find that your height is between sizes, we recommend you opt for the smaller size.

For more information on why choosing the right bike size is important, please visit our Bike Sizing page, or learn more about Bike Fitting.

Size

Geometry

SizeXSSMMDLGXL
Rider Height5'3 - 5'5 (160 - 165cm)5'5 - 5'7 (165 - 170cm)5'7 - 5'10 (170 - 178cm)5'10 - 6'1 (178 - 185cm)6'1 - 6'3 (185 - 191cm)
Crank Length (mm)170170170172.5172.5
A - Seat Angle75°74°73.5°73.3°73.3°
B - Top Tube (mm)515535555576590
C - Head Angle72°73°73°73.5°73.5°
D - Offset (mm)5345454545
E - Head Tube (mm)105120140160180
F - BB Drop (mm)6969696969
RC - Chainstay (mm)410410410410410
FC - Front Centre (mm)518575585598613
Reach (mm)379385392401410
Stack (mm)506523545564583
WB - Wheelbase (mm)9819759859991014
G - Seat Tube C-Top (mm)470500520540560
Integrated Handlebar Default (mm)360/400 x 80360/400 x 100360/400 x 100360/400 x 100380/420 x 120

Frequently Asked Questions

If you're between sizes, we usually recommend going smaller. It's easier to tweak the fit with a longer stem or more seat post, while a bigger frame gives you less room to adjust.
Complete builds based on a medium size: Sport: 8.25 kg - Enthusiast: 8.20 kg - Hero: 7.8 kg - Frame only: 1200 g.
Both use a bespoke blend of T1000 and T800 carbon fibres, but the SL R features more T1000 in its layup. This reduces weight slightly while maintaining the same stiffness, strength, and durability.
We offer a lifetime warranty on all Ribble frames and forks for the original purchaser. This covers any manufacturing defects in materials or workmanship, so you can ride with complete confidence. The standard manufacturer's warranty covers all other components.
The ULTRA-AERO SL R frameset is approved for use in UCI-sanctioned events. To comply with regulations, the supplied front fork disc brake adaptor must be swapped for the UCI-approved version included with the bike. Failure to make this change may result in disqualification when competing under UCI rules.
Not in the traditional sense. The bars' aggressive profile prevents compatibility with all current extension models. However, we have developed a suitable alternative: the ULTRA-AERO Clip-On Extensions. Exclusive to the Ultra SL R, these carbon extensions bolt into the underside of the handlebars, using the two mounting points normally reserved for an out-front computer mount. Anyone wanting to mount a cycle or GPS computer can mount it to the extensions themselves.
The ULTRA-AERO SL R uses a 68 mm BSA threaded bottom bracket shell, allowing for ease of maintenance and enhanced reliability.
The upper and lower bearings are P16 40 x 52 x 7 mm 45 x 45° and ACB 40 40 x 51.8 x 8 mm 45 x 45°, respectively.
Yes, the ULTRA-AERO carbon integrated handlebars, in combination with the frameset, enable all the cables to be entirely hidden. This preserves the ultra-sleek lines for maximum drag savings.
The frame is optimised around 28 mm tyres and can fit up to 32 mm, depending on the tread profile and manufacturer.
The ULTRA-AERO SL R features two bottle cage mounts with one on the seat tube and one on the downtube. Both are positioned to work seamlessly with Ribble aero bottle cages for optimal aerodynamic performance.
Thru Axles: Front Axle M12 mm x 1.5 mm x 125 mm - Rear Axle: M12 x 1.5 mm x 173mm.
No. As a speed-focused aero bike, the frame doesn’t feature integrated mudguard mounts.
We recommend a maximum system weight of 120 kg (bike, rider & luggage).
Yes. The extensions bolt into the underside of the handlebars via the mounting points usually used for an out-front computer mount. A computer or GPS unit can then be mounted to the extensions.
Yes. While the aero profile can limit compatibility, the bars are designed to work with standard out-front computer mounts, which fit neatly underneath.
No. Pedals aren’t included as riders use different systems. You can, however, choose from a range of best-selling pedals when configuring your bike.