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.

• Shimano 105 build: 9.3 kg
• Shimano 105 Di2 build: 9.5 kg
• Shimano Ultegra Di2 build: 8.9 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 a higher proportion of T1000 in its layup. This makes the SL R marginally lighter and stiffer while retaining the same stiffness, strength, and durability.

Yes, enhanced cable integration offers a neat, cable-free appearance by keeping cables hidden, shielded from wind, and protected against the elements.

No, the handlebars can't be raised after the bike has been built, as the steerer tube is trimmed to the correct length during assembly. However, we include 30 mm of spacers, so you can lower the bars if needed; raising them further won't be possible.

The frame is optimised around 28 mm tyres and can fit up to 32 mm, depending on the tread profile and manufacturer.

No. Ribble bikes are supplied with inner tubes installed as standard, even when fitted with tubeless-ready wheels and tyres.

If you'd like to run a tubeless setup, the conversion must be carried out after delivery. This typically requires tubeless valves, sealant and, in some cases, tubeless rim tape depending on the wheel specification. We recommend following the wheel and tyre manufacturer's instructions when converting to tubeless.

This approach gives riders the flexibility to choose the setup that best suits their riding preferences and maintenance requirements.

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

The ULTRA-AERO SL accommodates a 68 mm BSA bottom bracket, enabling easy 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 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 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 uses this derailleur hanger.

Yes, the ULTRA one-piece carbon cockpit is now available to order for this bike. Simply add it to your build in the bike configurator.

Yes. While the aero profile can limit compatibility, the bars are designed to work with various out-front computer mounts, including the LEVEL Out-Front mount or LEVEL Out-Front Mount with GoPro attachment, which fit neatly underneath.

Yes. The extensions will bolt to the underside of any Ribble RI-2, ULTRA, or LEVEL 5 carbon-integrated handlebars via the mounting points used for an out-front computer mount. A computer or GPS unit can then be mounted to the extensions.

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.