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 Áspero 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. FEATURES: Threaded Bottom Bracket: Áspero 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 Áspero. 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. SPECS: Frame Aspero GRX RX827 Di2 Fork Cervélo All-Carbon, Tapered Aspero Fork Rear Shock N/A Rims/Wheels Front: Reserve 48 GR, DT Swiss 370, 12x100mm, 24H, centerlock, tubeless compatible Rear: Reserve 53 GR, DT Swiss 370, 12x142mm, MS freehub, 24H, centerlock, tubeless compatible Hubs N/A Spokes N/A Tires WTB Vulpine TCS Light Fast Rolling Dual DNA SG 120tpi 700x45c Crankset Shimano GRX, RX820 Size 48 - 165mm SRAM, 170mm Shimano Size 51 - 165mm SRAM, 170mm Shimano Size 54 - 170mm Size 56 - 170mm Size 58 - 172.5mm Size 61 - 172.5mm Chainrings Wolf Tooth Components 46T Chainring for GRX Bottom Bracket FSA, T47 BBright for 24mm spindle Chain Shimano M8100 Front Derailleur N/A Rear Derailleur Shimano GRX, RX827 SGS Cassette/Rear Cogs Shimano XT, M8200, 10-51T, 12-Speed Shifters Shimano GRX, RX825 Handlebars Cervélo AB09 Carbon, 31.8mm clamp, 16 degree flare Size 48 - 36cm Size 51 - 38cm Size 54 - 40cm Size 56 - 40cm Size 58 - 42cm Size 61 - 42cm Stem Cervélo ST36 Alloy Size 48 - 70mm Size 51 - 80mm Size 54 - 90mm Size 56 - 90mm Size 58 - 100mm Size 61 - 100mm Brakes Shimano CL800 Centerlock Pedals N/A Saddle Fizik Vento Argo X3 Seat Post Cervélo SP19 Carbon 27.2 Size 48 - 0mm Size 51 - 0mm Size 54 - 0mm Size 56 - 0mm Size 58 - 0mm Size 61 - 15mm Extras - Cervélo Rear Accessory Mount - Cervélo Smartpak Top Tube Storage Bag 400A - Cervélo Front Computer/Accessory Mount 265