This is the first bike in our new Sierra Bicycle Supply Custom Build Series — a celebration of cool, fun builds that ride as good as they look. Builder Nathan Troyer designed this one as a lightweight climbing and all-day endurance machine with serious style.
Having climbed Wild Rose in Death Valley more times than he can count, Nate knows what makes a proper climbing bike — and this one delivers. Weighing in at just 15.0 lbs, it’s perfectly suited for big days in the saddle.
Finished in a rare Satin Flake Silver / Dusty Pink + Champagne Radial Fade colorway, this Specialized Aethos Fact 10r Carbon is equal parts performance and personality.
The Aethos line promises three things—exceptional light weight, perfectly-balanced ride characteristics, and undeniable style—and this Aethos pro is no exception. Aethos: Billions of calculations in the pursuit of one thing—the perfect ride.
Technical Specifications
Frameset
Frame: Aethos FACT 10r Carbon, Rider First Engineered™, threaded BB, 12x142mm thru-axle, flat-mount disc
Fork: FACT Carbon, 12x100mm thru-axle, flat-mount disc
Brakes
Front Brake: SRAM Force eTAP AXS, hydraulic disc, 160mm Centerline X Road 2-Piece rotor with Wolf Tooth CenterLock lockring
Rear Brake: SRAM Force eTAP AXS, hydraulic disc, 160mm Centerline X Road 2-Piece rotor with Wolf Tooth CenterLock lockring
Drivetrain
Shift Levers: SRAM Force eTap AXS HRD
Front Derailleur: SRAM Force AXS E1, braze-on with SRAM battery
Rear Derailleur: SRAM RED eTap AXS Rear Derailleur – 12-Speed, Short Cage, 33t Max, Black, D1, with SRAM battery
Cassette: SRAM Force XG-1270, 12-speed, 10–33t, silver (XDR driver body, E1)
Chain: SRAM Red FlatTop E1 12-speed, 126 links, silver
Crankset: SRAM Force D2, 170mm, 2x12-speed, 46/33T, DUB spindle interface, iridescent gray (power meter upgradeable)
Bottom Bracket: SRAM DUB BSA 73
Wheels & Tires
Front Wheel: Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, DT for Roval 350 hub, DT Swiss Aerolite spokes, tubeless
Rear Wheel: Roval Alpinist CL II, 21mm internal width carbon rim, 33mm depth, DT for Roval 350 hub, DT Swiss Aerolite spokes, tubeless
Front Tire: S-Works Turbo TLR Race, Tan Wall, 700x28mm – Tubeless
Rear Tire: S-Works Turbo TLR Race, Tan Wall, 700x28mm – Tubeless
Cockpit
Stem: Roval Alpinist, 31.8 x 100mm, ±17° flip/flop rise/drop (pictured dropped)
Handlebars: S-Works Shallow Bend Carbon, 40cm
Tape: Supacaz Super Sticky Kush Star Fade, Neon Pink / Neon Pink
Saddle: Specialized Power Expert with Mirror, 143mm
Seatpost: Roval Alpinist Carbon
Seat Binder: Specialized Alloy, 30mm
Weight
Weight: 15 lb 0 oz (Size 54)
