Cannondale has recently switched its Jekyll and Trigger bikes to 27.5-inch wheels - and now the Californian bike giant is following suit. Back in February, news of Specialized's 650b tires made the rounds and the first rumours about the end of the 26/29-inch era for the Californian brand's bikes began to spread.

This spring, the mountain bike pioneer is launching two 650b Stumpjumper models: the 150 millimeter FSR Expert Carbon Evo and Stumpjumper FSR Comp Evo all-mountain bikes will feature the medium-sized wheels. The corresponding bikes, which previously rolled off-road on 26-inch wheels, will no longer be produced.In the Stumpjumper FSR Expert Carbon Evo 650b model pictured, a carbon frame forms the center, a Pike RC 650b forms the front. Shifting is handled by a Sram X01 11-speed single-chainring unit, while an XT stopper from Shimano provides the braking power. As befits the US manufacturer, numerous in-house parts such as a dropper seatpost and Roval wheels complete the bike.

www.specialized.com