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Ultra-Aero SL - Pro
Shimano Ultegra Di2

  1. £3,899
  2. Was £4,399
  3. Save £500
When being fast just isn’t fast enough! Faster in the wind tunnel and quicker on the road, the ULTRA-AERO SL is designed to dominate, defeat the wind, and make your fastest rides even faster. In the Pro specification, it's paired with Shimano's premium Ultegra Di2 electronic groupset, aerodynamic Mavic Cosmic S 42 carbon wheels, 28 mm Pirelli P-Zero Road tyres, and Selle Italia SLR Boost saddle. The integrated carbon cockpit completes this pro-level package.
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Product code: BULTSL8100D

...And Many Ways To Pay...

  • "Exceptionally fast"
    Cycling News
  • "Ribble's Ultra SL rewrites the aero rule book"
    Bike Radar
  • "Puts the Rider front & centre"
    Cycling Plus
DescriptionGroupsetWheelsetHandlebarsSaddleSizeGeometryFrequently Asked Questions

Description

When being fast just isn’t fast enough! Faster in the wind tunnel and quicker on the road, the ULTRA-AERO SL is designed to dominate, defeat the wind, and make your fastest rides even faster. In Pro specification, it's paired with Shimano's premium Ultegra Di2 electronic groupset, aerodynamic Mavic Cosmic S 42 carbon wheels, 28 mm Pirelli P-Zero Road tyres, and Selle Italia SLR Boost saddle. The integrated carbon cockpit completes this pro-level package.

Groupset

Shimano Ultegra R8100 has been completely redesigned with all-new ergonomics, even greater brake modulation and wireless electronic shifting precision. It delivers the world’s fastest and most reliable wireless shifting and a wide gear range which means no matter how steep a climb is; it’s never outside your comfort zone. Di2 gives you instant, accurate, lightning-fast shifts every time at the push of a button. Even in the most extreme of conditions, shifting is precise and controlled. You can even change gear under heavy load while climbing or accelerating. With Di2, you are in complete control.

Groupset

Wheelset

Mavic Cosmic S 42 Carbon wheels are engineered for riders seeking the perfect balance between weight, aerodynamics, and speed. Their minimal drag and low inertia design allows you to accelerate and climb faster, while holding higher speeds for longer. Paired with Pirelli P Zero Road tyres, which balance performance with durability, for both reliability and grip. The carcass features excellent puncture resistance while keeping weight low.

Wheelset

Handlebars

The Ribble RI-2 carbon integrated handlebar is a proprietary system that conceals every cable while providing optimal fit, adjustability, and seamless integration. This one-piece cockpit exemplifies the perfect marriage of form and function, combining a clean, cable-free aesthetic with advanced aerodynamics to reduce drag by up to 40% compared to a conventional handlebar setup. With a super-stiff carbon monocoque construction and refined ergonomics, the RI-2 system is designed for speed-conscious road riders who prioritise performance and all-day comfort.

* Image for illustrative purposes only. The RI-2 replaces the LEVEL 5 handlebar and features updated graphics and a revised aesthetic.

Handlebars

Saddle

The ULTRA-AERO seat post features a truncated aerofoil profile that's aerodynamically optimised to reduce drag in the high-speed airflow disturbed by the rider's leg. A composite shaft absorbs road shocks for a vibration-smoothing ride quality further enhanced by a Selle Italia SLR Boost saddle. Bringing high performance, comfort, and support to any endurance ride or race event, the SLR's neutral shape allows complete freedom of movement without compromising pedalling efficiency or power output.

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 Angle75.0°74°73.5°73.3°73.3°
B - Top Tube (mm)515535555576590
C - Head Angle72°73°73°73.5°73.5°
D - Fork 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 Bar Default (mm)380 x 80400 x 100400 x 100400 x 100420 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.
Based on a medium frame size: Sport: 8.65 kg - Enthusiast: 8.60 kg - Pro: 8.50 kg - Frame only (medium): 1200 g
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 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.
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.
No. The ULTRA-AERO handlebars are exclusive to the ULTRA-AERO SL R and are only available as part of this bike.
The ULTRA-AERO SL 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 Ribble RI-2 integrated carbon handlebars, in combination with the frameset, enable all the cables to be fully hidden, preserving the Ultra's super 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 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.
The frame requires M12 x 125 mm x 1.5 and M12 x 173 mm x 1.5 front and rear thru axles.
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.