SONNET ROAD MK1
By using Italian steel maestro’s Columbus’ Spirit tubing – specifically their Keirin variant – the Mk1 has a heart comprising triple-butted steel and one usually reserved for the track. The result is tubing that’s stiff where you need it. A real-life example? Sprinting away from traffic lights and powering force through the bottom bracket does little to unsettle the frame’s balance. We were also impressed how lively it is.