B-Side (27.5″ / 650b MTB) (2017) [RETIRED]

[RETIRED. Replaced by the Riff model in 2018]

The B-Side is our hardtail frame for 27.5"/650b wheels. This 4th generation B-Side is more versatile than ever. Snazzy Tange/IRD Sliding Dropouts allow you to go single-speed or geared. A modified chainstay allows fiting even some double cranks with "plus size" 2.8" wide tires without needing to invest in Boost parts. We even offer a belt-drive ready version.

- Tange Prestige heat-treated butted CrMo steel; butted CrMo rear end

- Disc brakes only (no canti studs)

- Standard or belt-drive versions available

- Tange/IRD Sliding Dropouts allows geared and single-speed builds with easy wheel removal

- S-bend seatstays and chainstays

- Low sloping top tube/short seat tube

- Geometry is optimized for 100mm travel 27.5" forks and will handle 120mm forks great too

- CNC-machined 44mm headtube: Will take 1-1/8" steerers with a ZeroStack 44 headset or tapered steerers with a ZS44 upper assembly and external cup (EC44) lower assembly

- 27.2mm post size/28.6mm frt. der. size/29.8mm(or 30.0) seat collar, 73mm bottom bracket (English threads); 400mm+ post recommended

- Recommended tire size: 27.5 x 1.95 - 2.8”

- Color: Fiery Red

- Wt: 5.1 lbs.

- Sizes: SM(14.5"), MD(16.5"), LG(18.5"), XL(20.5")


B-Side (27.5″ / 650b MTB) (2017) [RETIRED]

  • Sizing information you should know:

    If you normally ride a 17”, you may fit the 16.5” B-Side (400mm seatpost recommended).
    Bottom bracket shell: 73mm with English threading (updated spec for 2017)
    Seat collar size: 29.8 - 30.0mm
    Seatpost diameter: 27.2mm
    Front derailleur clamp diameter: 28.6mm