New for 2018, the Doppler brings riders a dedicated brevet and touring bike with smooth-rolling 650B tires. While gravel riding is the latest trend, 650b wheels have been a well-kept secret within the brevet community for decades. 650b offers a distinct advantage by offering a larger-volume tire to provide both greater cushion and traction on rough roads. The smaller diameter 650b rims also provide a stronger wheel which is ideal for loaded touring or harsh conditions. Compared to the Inversion and Radar, the Doppler frame offers a more classic road-bike geometry, while still offering a high level of functionality with touring-focused drivetrain and frame features.