Ridley Astra RS Review: A Stiff, Aero Gravel Race Bike Built for Speed

Introduction

Ridley is a Belgian brand with deep roots in race bikes, and the Astra RS is its newest and fastest gravel race bike. It joins the Kanzo Adventure and Kanzo Fast to form a new family of gravel models, and the whole group is aimed at the sharp end of racing, the kind of long, fast events where covering ground quickly matters more than carrying luggage.

The design borrows heavily from the Falcon RS road race bike. There is a deep head tube, a fork crown that flows into the down tube, a substantial oversized bottom bracket, and dropped chainstays to free up tire and crank clearance. Cable routing is fully internal on this model, and the front end uses a narrow one-piece bar and stem, a detail that trades some steering agility for a more compact and aerodynamic position. Out back sits a D-shaped seatpost.

The bike covered here is the range-topping RS build, fitted with a SRAM Red AXS Explore groupset, wide carbon wheels, 47mm tires and a 3D printed saddle. On the scales it weighed 7.6kg for a size medium without pedals, which is light for a gravel bike running rubber this wide.

Who the Ridley Astra RS Is For

This is a race bike first. Riders who line up at fast gravel events, or who simply want to ride their local trails at speed, are the natural audience. The narrow bar and stretched-out hood position pull the body into a compact, aerodynamic shape, and the frame holds a line with remarkable stability, which is exactly what you want in a fast-moving group on loose surfaces.

Ridley also offers the Essential model, which uses the same frame shapes and the same tire clearance but a lower grade carbon fiber, pushing frame weight up to around 1,000g. The RS frame is sub-900g. The Essential swaps the aero D-shaped seatpost for a round one, which is a genuinely useful detail because it opens the door to a standard post or a suspension post. For riders who want the same geometry and clearance without the halo price, that version deserves a look.

Main Strengths

Aero Frame and Race-Ready Geometry

The Astra RS is one of the more aerodynamic gravel bikes available. Every tube shape carries over from the Falcon RS, from the deep head tube and the kink where the fork crown meets the down tube to the oversized bottom bracket and dropped rear stays. The narrow one-piece bar and stem complete the picture and make the bike feel quick the moment you sit on it.

There is also an optional frame bag developed with Apidura in a wind tunnel, available later in the year. It bolts to three mounts on the frame and effectively acts as an aero fairing, a concept similar to the optional bag Canyon offers on the Grail.

Tire Clearance and Wide Rubber

Tire clearance is where this bike makes its strongest practical argument. With a single chainring setup there is room for tires up to 52mm, and even with a front derailleur fitted the clearance only drops to 47mm. The bike ships with 47mm tires. By comparison, a Canyon Grail is limited to 42mm, which is a meaningful gap given how quickly gravel racing has moved toward wider rubber.

The frame is built around that width too, with dropped chainstays creating space for both tire and crank. For riders who have already moved to 45mm and want to go wider without stepping up to a mountain bike, this is one of the clearest reasons to consider the Astra RS.

Things to Consider Before Buying

Ride Feel and Stiffness

The Astra RS is a very stiff bike. Even running 47mm tires at low pressures around 20 psi, the ride stays firm, and exposed rock at speed can feel jarring. It is not as smooth as a Giant Revolt or an Enve MOG, despite the wide tires suggesting otherwise. If comfort on rough, loose terrain is a priority, that is worth knowing before you commit.

The handling reflects the race brief as well. In a straight line the bike is planted and rock solid, holding its line through narrow ruts with very little input. In the turns, especially when riding on the hoods, steering feels heavy and slow, and agility is limited. The bar itself is nicely shaped, with swept-back tops, a useful flare in the drops and grippy tape, and the fit worked well for a 181cm rider on a size medium with roughly a 56cm effective top tube.

Mounts, Versatility, and Price

Versatility is deliberately limited. There are no fork mounts and no fender or mudguard mounts, so winter road riding and loaded bikepacking are not really part of the plan. Ridley points riders toward the Kanzo Adventure for that. What you do get is a top tube mount with a neat cover to keep the profile smooth, a third bottle cage position, and three down tube mounts that can be run lower or higher depending on whether the frame bag is fitted. The cover is not color matched to the frame, which feels like a small missed detail.

Price is the other consideration. The range starts at around €3,300 for the Essential model, while the RS tested here sits at the very top. Against direct-sale rivals such as the Canyon Grail, the same specification costs noticeably more, and it runs about €700 above a Trek Checkmate with a comparable groupset, though it undercuts a BMC Kaius.

Buying Advice

The Astra RS makes the most sense for a rider whose priority is outright speed on gravel. If your calendar includes fast gravel races, or your local trails are smooth enough to reward a stiff, aerodynamic frame, this bike delivers in a way that few competitors can match, particularly with 52mm of tire clearance in a 1x setup.

If you want one bike for racing, winter road miles, fenders and the occasional loaded trip, the missing mounts will frustrate you, and a more versatile option such as the Enve MOG or the Kanzo Adventure is likely to suit better. For riders who want the geometry and clearance without the halo build, the Essential model with its round seatpost and lower frame weight penalty is the smarter place to start. Decide which of those two riders you are, and the choice becomes straightforward.

Conclusion

The Ridley Astra RS is an impressive, speed-focused gravel race bike. It carries genuine aerodynamic development from the road side of the range, offers class-leading tire clearance, and holds its line beautifully at pace. It is also stiff, expensive relative to several rivals, and short on mounting points for anything beyond racing and fast riding. For the right rider, those trade-offs are exactly the point.