EXTRA 20% Off 2+ Tires
Summit+ Days exclsuive
Get a FREE Castelli Jersey
With select full-price bib short purchase
Exclusive Deals & Giveaways
Summit+ Days is on
Add Ons
Join Summit Club+ and
Lightweight and aerodynamic—ASTR RS Gravel Frameset engineered for race-winning speed
What Our Gearhead® Experts Are Saying:
"The ASTR RS takes everything I loved about the Falcn’s aero efficiency and adds gravel capability. The fork diffuser really smooths airflow, and the frame feels rock solid during sprints. With a 52mm clearance and lightweight build, it’s the ultimate weapon for gravel racers who refuse to compromise."
The Ridley ASTR RS Gravel Frameset stands at the pinnacle of performance-driven gravel design, merging the aerodynamic precision of Ridley’s Falcn RS with the adaptability required for modern off-road racing. At its heart lies the Elite Series carbon frame—crafted from Toray’s high-modulus fibers in a 60T/50T/30T/24T blend. This layup delivers remarkable stiffness-to-weight balance, enabling an 890g frame weight without sacrificing structural integrity or ride comfort.
The ASTR RS’s aero-to-weight optimization ensures aerodynamic gains that rival Ridley’s fastest road bikes, thanks to sleek tube shaping and an integrated diffuser fork that channels airflow efficiently through the crown and downtube junction. Its modern race geometry—featuring a 71.5° head angle, 74° seat tube, and lowered bottom bracket—strikes a perfect equilibrium between agility and composure, allowing riders to corner aggressively while maintaining high-speed stability.
Compatibility is another strength: a removable front derailleur clamp and Universal Derailleur Hanger (UDH) future-proof the frameset for both 1x and 2x drivetrains, while generous 52mm tire clearance expands its range from hardpack to chunky race courses. For elite racers and serious gravel enthusiasts, the ASTR RS is more than a frameset—it’s a platform for pure performance, engineered to dominate any gravel event from the first pedal stroke to the finish line.
Details
- Elite Series carbon gravel frameset built for high-speed racing
- Aero-to-weight optimized design combines aerodynamic shaping and low mass
- Integrated diffuser fork reduces drag and improves airflow
- Race geometry balances stability, climbing efficiency, and responsiveness
- 52mm maximum tire clearance for versatile gravel and all-road performance
- Removable front derailleur mount allows for clean 1x or 2x setups
- Universal Derailleur Hanger (UDH) compatible with all modern drivetrains
- 890g frame weight delivers elite stiffness-to-weight performance
- Item #RIDC085
- Frame Material
- carbon (Toray 60T/50T/30T/24T blend)
- Fork
- ASTR RS TA 12x100mm, integrated diffuser, D-shape steerer, 50mm rake
- Headset Included
- integrated
- Bottom Bracket Type
- BB86
- Front Derailleur Mount
- universal
- Compatible Components
- Shimano
- Handlebar
- Forza Nimbus Pro, 360–400mm, flared
- Activity
- gravel biking
- Seatpost
- Forza Aero carbon, 6mm offset, 400mm length
- Front Axle
- 12x100mm
- Rear Axle
- 12x142mm
- Tire Clearance
- 52mm (1x), 47mm (2x)
.jpg)
Build Your Dream Bike
Our Gearhead Experts work with you one-on-one to spec every component from frame to finish, matched to your riding style, terrain, and budget. Submit the form to get started, or call 801-204-4681 to talk now.