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Ultra-Aero SL R - Sport
Shimano 105 Di2

  1. $5,645
The bike that redefines speed. Born from a desire to do what’s never been done before, the ULTREA-AERO SL R delivers aerodynamic gains once thought impossible, making your fastest rides even faster. In its Sport build, it pairs Shimano’s 105 Di2 electronic groupset with lightweight Mavic Ksyrium 30 alloy wheels, Pirelli P Zero Road tyres, and a unisex Selle Italia Model X Superflow saddle for all-around performance and comfort. 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: BULTSLR7150DBLK

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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, the ULTRA-AERO SL R delivers aerodynamic gains once thought impossible, making your fastest rides even faster. In its Sport build, it pairs Shimano’s 105 Di2 electronic groupset with lightweight Mavic Ksyrium 30 alloy wheels, Pirelli P Zero Road tyres, and a unisex Selle Italia Model X Superflow saddle for all-round performance and comfort. The integrated Ultra carbon cockpit completes this ground-breaking package, engineered to cut through the air and turn every watt into pure speed.

Groupset

Shimano 105 Di2 brings pro-level performance within reach. Drawing on technology from Dura-Ace and Ultegra, it delivers the same lightning-fast, accurate shifting and smooth, intuitive control and now more accessible than ever. With refined ergonomics, 105-optimised gearing, and the all-weather confidence of hydraulic disc brakes, 105 Di2 redefines what performance feels like on every ride.

Groupset

Wheelset

Ksyrium 30 Disc is the perfect entry point into high-level race performance. This tubeless-compatible wheelset's dynamic ride quality helps you roll faster and smoother while retaining a lightweight feel for climbing and accelerating. Paired with Pirelli P Zero Road tyres for grip, comfort, and puncture protection, this setup strikes the perfect balance between speed and durability, whatever the road ahead.

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

Designed for pure aero performance, the ULTRA-AERO seatpost combines wind-cheating efficiency with real-world comfort. Its truncated aerofoil profile is shaped to cut through turbulent airflow behind the rider’s legs, helping you stay faster for longer. The composite shaft smooths out road buzz for a more refined ride feel, while the Selle Italia Model X saddle adds all-day comfort with its gel padding and Superflow cut-out. Built with a glue-less, sustainable design, it proves that performance and responsibility can go hand in hand.

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)165170170172.5172.5
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 build weights, 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 x 40 x 52 x 7 mm 45 x 45° and ACB 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 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.