Ultra-Aero SL Frameset

  1. £2,299
Built to dominate, the Ultra-Aero SL is crafted to make your fastest rides even faster. Precision-engineered for real-world aerodynamics, it gives you a competitive edge—whether you're chasing PBs, racing the clock, or sprinting for the finish line. Now available as a frameset—build it your way, and leave everyone else behind.
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Product code: FULTSL

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Description

Born from extensive R&D, the Ultra-Aero SL is designed for real-world aerodynamic performance. By optimising airflow between bike and rider, it delivers unmatched efficiency in everyday riding conditions. Rigorously tested against the Endurance SL R, a proven race-winning machine, the Ultra-Aero SL is faster, lighter, and more refined—unlocking true performance gains. This isn’t just a pro-level aero bike—it’s for anyone chasing speed, efficiency, and the thrill of riding faster for less effort.

Now available as a frameset—designed for you to create your ultimate performance build.

Construction

Every inch of the frame, fork, and seat post is designed for pure speed. The fork seamlessly integrates with the head tube and handlebars, slicing through the wind to minimize drag across all angles. After extensive testing, we found the sweet spot: 68mm x 15mm fork blades—engineered to deliver serious aero gains from 5° and beyond. But here’s where it gets exciting—at 10° of YAW, the fork doesn’t just cut resistance; it creates thrust, turning the wind into an advantage and pushing you forward.

This isn’t just aerodynamics—it’s free speed.

Construction

Integration

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.

Integration

Ultra-Aero SL Seatpost

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.

Ultra-Aero SL Seatpost

Specifications

  • Frame: Ultra-Aero SL T1000/T800 Carbon Monocoque
  • Forks: Ultra-Aero SL Full Carbon Tapered Steerer
  • Headset: Ribble 1.125" x 1.5" (included)
  • Handlebars: Ribble RI-2 Carbon Integrated (included)
  • Seatpost: Ultra-Aero SL Carbon (included)
  • Bottom Bracket: 68mm Threaded BSA
  • Recommended Tyre Size: 700 x 25 to 700 x 32mm
  • Front Axle: 12 x100 mm (included)
  • Rear Axle: 12 x 142 mm (included)
  • Weight: Frame - 1200 g; Forks- 580 g

Size & Geometry

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 - 170m)5'7 - 5'10 (170 - 178cm)5'10 - 6'1 (178 - 185cm)6'1 - 6'3 (185 - 191cm)
A -Seat Angle75°74°73.5°73.3°73.3°
B - Top Tube (mm)515535555570585
C - Head Angle72°73°73°73.5°73.5°
D - Fork Offset (mm)5345454545
E - Head Tube (mm)105120140160180
F - BB Drop6969696969
G - Seat Tube (mm)470500520540560
RC - Chainstay410410410410410
FC - Front Centre518575585598613
Reach (mm)379385392401410
Stack (mm)506523545564583
WB -Wheelbase9819759859991014

The T1000/T800 full carbon monocoque frame weighs 1200 g and the matching forks 580 g (based on a medium frame).

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.

Yes. Cycling's governing body has approved the Ultra-Aero SL for competition in UCI-sanctioned events. However, the disc brake adaptor for the front forks must be swapped out for the alternative version supplied with the frame. Failure to follow these guidelines when competing in events carried out under UCI regulations may result in disqualification.

Yes. However, the aerodynamic profile of the upper part of the handlebar makes it difficult to find compatible lights and computers. To address this issue, we've designed the handlebars to accommodate any compatible out-front computer mount, which attaches to the underside of the handlebars.

The frame is aerodynamically optimised for 28 mm tyres and can accommodate up to 32 mm, depending on the tyre manufacturer/tread profile.

No. This is a pure race bike designed for performance and speed, so it does not have the necessary mounts or clearance to fit mudguards.

No. Designed as a pure race bike, the Ultra-Aero SL is not pannier rack compatible.

The Ultra-Aero SL has a proprietary carbon seat post designed to carve the air for additional aero gains.

It accepts a threaded 68mm BSA bottom bracket.

The dimensions of the upper and lower bearings are P16 40 x 52 x 7 mm, 45 x 45°, and ACB40 40 x 51.8 x 8 mm, 45 x 45°, respectively.

The frame uses M12 x 125 mm x 1.5 mm front and M12 x 173 mm x 1.5 mm rear thru-axles (included).

When tightening the axles, do not exceed 10 Nm.

We suggest that you apply:

  • Lithium Grease to the fixture bolts, bearings, thru-axles and pedal axles
  • Carbon Fibre Grip to the seat post and carbon fork expander

The Ultra-Aero SL features a braze-on front derailleur fitting.

No, any standard bottle cage will fit. However, the Ribble Aero bottle cage system complements the Ultra's signature downtube, further enhancing the aerodynamic gains.

Yes, the seat post features a universal clamping system for alloy and carbon-railed saddles.

The frame's enhanced cable integration ensures a neat, cable-free appearance, keeping cables hidden, shielded from wind, and protected against the elements.

We recommened a full system weight of 120 kg (bike, rider & luggage)