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.

Build weights are provided for a medium‑sized frame and are intended solely as general guidance. Actual weight will vary based on the selected components and accessories, as well as standard manufacturing tolerances. These figures do not constitute a guarantee or warranty of final product weight, and we may occasionally make minor modifications to specifications without prior notice.

• 105 build: 9.5 kg
• Ultegra build: 8.8 kg
• Dura-Ace build: 8.3 kg
• Frame only (medium size): 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.

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-AERO 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 do so on 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.

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.

Yes. Combined with the frameset, the ULTRA-AERO carbon integrated handlebars cleverly conceal all the cables, 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.

No. As a speed-focused aero bike, the frame doesn’t feature integrated mudguard mounts.

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.

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.

The ULTRA-AERO SL R uses a proprietary seatpost, available in inline or setback options and two lengths, making it easy to dial in the right fit across different frame sizes.

Thru Axles:

• Front: M12 x 1.5 x 125 mm
• Rear: M12 x 1.5 mm x 173 mm

The ULTRA-AERO SL R uses this derailleur hanger.

We recommend a maximum system weight of 120 kg (bike, rider & luggage).

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.