Traildonkey 4.2 can be run in a native singlespeed configuration thanks to its sliding dropout system, and this TRP Hylex Singlespeed build is the build spec that we ourselves have ridden to victory in the singlespeed categories at all of the biggest gravel races in the United States. Hylex are some of the most beautiful levers in the business, with their drilled design and fantastic ergonomics. Braking performance is second to none. This build is inherently lighter weight due to the lack of cassette and derailleur, and is helped by the lightweight Rodeo 3.0X wheels, Repente Quasar 2.0 saddle, and Ritchey components.
| COCKPIT | |
| Handlebar | Ritchey BAQUIANO COMP |
| Stem | Ritchey 4-AXIS OE |
| Headset | RODEO EC44 |
| Headset comp. plug | Included |
| Headset spacers | Carbon |
| Seatpost | Ritchey 2B OE 27.2mm |
| Dropper lever | None |
| Seatpost clamp | Rodeo 6066 |
| Saddle | Selle Repente Quasar 1.1b / Rodeo / 142mm / SS |
| Bar Tape | RODEO / black / black trees |
| DRIVETRAIN | |
| Brake Lever – Front | TRP Hylex RS / black & black |
| Brake Lever – Rear | TRP Hylex RS / black & black |
| Front Derailleur | None |
| FD band clamp | None |
| Rear Derailleur | None |
| Crankset | Praxis Alba X |
| Chainring | Praxis DM 1x / 42t |
| Bottom Bracket | Praxis T47 / 85.5mm / internal / M30 |
| Chain | SRAM GX Eagle 12s silver |
| Brake Caliper – Front | TRP Hylex RS / flat mount / black |
| Brake Caliper – Rear | TRP Hylex RS / flat mount / black |
| Brake adapter – Front | Included |
| Brake adapter – Rear | Included |
| Brake Line – Front | TRP hydro / incl. |
| Brake Line – Rear | TRP hydro / incl. |
| Axle – Front | Rodeo Thru Axle / 12 x 100mm |
| Axle – Rear | Rodeo Thru Axle / 12 x 142mm |
| Axle – Lever | 3.0 bottle opener / 6mm hex |
| WHEELSET | |
| Rim Front | Rodeo 3.0 Carbon / 700c / 28h |
| Rim Rear | Rodeo 3.0 Carbon / 700c / 28h |
| Hub Front | Rodeo 3.0 / 28h / 12×100 |
| Hub Rear | Rodeo 3.0 / 28h / 12×142 / S11 |
| Spokes | Sapim Race, 2.0/1.8, black |
| Nipples | Brass, black |
| Build | Built in the USA |
| Valve | Tubeless, black |
| Rim Tape | WTB |
| Tire Sealant | Orange Seal |
| Tire front | Vittoria Terreno Dry G2.0 / 700 x 38 / black |
| Tire rear | Vittoria Terreno Dry G2.0 / 700 x 38 / black |
| Rotor front | Campagnolo Ekar / centerlock / 160mm |
| Rotor rear | Campagnolo Ekar / centerlock / 160mm |
| Cassette | Surly SS cog, 9-spline, 18t |
| SS spacers | Surly Single-Speed Kit, Spacers and Lockring |