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Aspero GRX RX820 Gravel Bike


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The Bilsland Verdict: "The Aspero is an all out, off road, drop bar racer that takes Cervelo's expertise in speed off of the tarmac and into the dirt. Take gravel events to a new level of seriously fast fun and be prepared to not just take part, but compete."


In 2019, Áspero took the gravel world by storm, heralding a “new era of speed in gravel.” Fun, but flat out. The new Áspero remains true to its original brief, but with some improvements: a threaded BB shell, neater cable routing, and a UDH-compatible derailleur hanger for those who want to use SRAM’s Transmission drivetrains. And it’s more aero, of course. In the case of Áspero, aerodynamic performance is less about pure speed as a result of drag reduction, and more about conservation of energy. After a big day in a headwind, the three watts saved over the previous Aspero might add up to one less energy gel your stomach has to digest—WORTH IT. 

In addition to the drag reduction, we also dropped the seat stays to give a bit more compliance out back, and reduced front-end stiffness slightly to make the last hours of a long race less painful. Between those dropped seat stays, we added in a bit more clearance for mud, too, taking what we learned from R5-CX (and the Unbound mudfest in 2023). It’s a lot of seemingly small improvements, but they add up to a lot. The result is a bike that feels a lot like the original Áspero, but is faster, more comfortable, and more versatile.

Threaded Bottom Bracket 

Aspero uses the asymmetrical T47a threaded bottom bracket we pioneered on R5-CX. It’s a simple, rider-serviceable interface that allows us to deliver the benefits of BBRight in a more user-friendly form. 

Universal Derailleur Hanger

We used SRAM’s Universal Derailleur Hanger (UDH) standard on the new Aspero. It’s ideal if you want to live your best ‘business in the front, party in the back’ life with one of SRAM’s Transmission drivetrains today, and ensures compatibility for future drivetrain developments.

Internal Cable Routing 

Aspero shares the same bearing dimensions as R5, Soloist, R5-CX, and Caledonia, which means you can use any combination of bearing caps and stems. Want a super-racy, fully-internal look? Grab the ST31 and HB13 from R5.

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Aspero GRX RX820 Gravel Bike - Billy Bilsland Cycles

Aspero GRX RX820 Gravel Bike




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Cervélo All-Carbon, Aspero Frame


Cervélo All-Carbon, Tapered Aspero Fork


Shimano GRX, RX820, 12 speed


FSA IS2 1-1/4 x 1-1/2


Cervélo ST36 Alloy, w Cable Management


Cervélo AB09 Carbon, 31.8mm clamp, 16 degree flare


Shimano GRX, RX820, 12 speed

Brake Calipers

Shimano GRX RX820

Brake Rotors

Shimano CL800 Centerlock

Front Derailleur

Shimano GRX, RX820, 12 speed

Rear Derailleur

Shimano GRX, RX820, 12 speed


Shimano HG710, 11-36, 12 speed


Shimano M8100, 12 speed


Shimano GRX 820, 48/31T, 12 Speed

Bottom Bracket

FSA, T47 BBright, 24mm spindle


Fulcrum Rapid Red 300, 12x100(F)/142(R), 24H, 24mm IW, HG freehub, centerlock, tubeless compatible


WTB Vulpine TCS Light Fast Rolling Dual DNA 60tpi 700x40c


Cervélo SP19 Carbon 27.2


Prologo Dimension NDR T4.0


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