According to Scott:
ReferenceWe believe the excitement surrounding PLUS bikes is well founded. The increases in traction, control, and tire stability are dramatic, and thanks to the design of our new bikes, agility and handling are not compromised. On our 2016 Plus bikes, the Syncros rims have 40mm internal width and wear 2.8-inch Schwalbe tires. We worked closely with Schwalbe to determine the 2.8 size as an ideal balance of added traction (+21% contact patch) with minimal added rolling resistance ( +1%). Furthermore, weight gain is minimal, and frame geometry is subtly adjusted to take full profit of the added traction.Other key features of the Genius range include: Boost hub spacing (110mm front, 148mm rear), 2016 FOX suspension with a new TwinLoc lever, standard crankarm Q-factor, and short chainstays for agile handling.