HAUL ASS, NOT CARGO

In 2019, spero took the gravel world by storm, heralding a new era of speed in gravel. Fun, but flat out. The new spero 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 SRAMs Transmission drivetrains. And its more aero, of course. In the case of spero, 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 digestWORTH 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). Its 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 spero, but is faster, more comfortable, and more versatile.

Fork Cervlo All-Carbon, Tapered Aspero Fork Headset FSA IS2 1-1/4 x 1-1/2 Seatpost Cervlo Alloy 27.2 15mm Offset Left Shifter/Brake Shimano GRX, RX610 Right Shifter/Brake Shimano GRX, RX610, 12 speed Rear Derailleur Shimano GRX, RX822, 12 speed Brake Calipers Shimano GRX RX610 Brake Rotors Shimano RT66 6-Bolt Thru Axles Cervlo Aero Thru-Axles, 12×100/142 Crankset Shimano GRX 610, 40T, 12 speed Bottom Bracket FSA, T47 BBright, 24mm spindle Handlebar Zipp Service Course 70 XPLR Alloy, 31.8mm clamp, 5 degree flare, 11 degree outsweep Stem Cervlo ST36 Alloy, w Cable Management Saddle Cervlo Saddle Cassette Shimano M7100, 10-45, 12 speed Chain Shimano M7100, 12 speed Front Wheel Alexrims Boondocks 7D, 12x100mm, 28H, 23mm IW, 6 bolt, tubeless compatible Rear Wheel Alexrims Boondocks 7D, 12x142mm, 28H, 23mm IW, MS freehub, 6 bolt, tubeless compatible Tire WTB Vulpine TCS Light Fast Rolling Dual DNA 60tpi 700x40c Accessories Smartpak 400A Top Tube Storage Bag