Riff v.1 (27.5″ Trail Hardtail) [RETIRED]

[There is an updated version to this model.] The Riff is our hardtail frame for 27.5"/650b wheels. Geometry is ideal for single track, flowy trails and bikepacking. Tough IRD Broski Sliding Dropouts allow you to go single-speed or geared or even run hub gears. While the industry is telling everyone to get "Boost", the Riff lets you run old 142mm thru-axle (or even 135mm QR with a different insert). Another retro feature: you can use a front derailleur if you want.

Its most unusual option: The Riff is offered in a belt-drive ready version.

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

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

- Standard or Belt-Drive compatible versions available (split for installing belt is on the seatstay.)

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

– In 2022 these come set for 142 x 12mm Thru-Axle hubs. (Can be converted to 135mm spacing for traditional QR hubs with IRD aftermarket inserts)

- ISO disc brake tabs

- Internal routing on seat tube for dropper post - Front derailleur compatible (top pull) - Rear rack and fender eyelets

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

- 31.6mm post size/34.9mm frt. der. size/34.9mm seat collar, 73mm bottom bracket (English threads); 400mm+ post recommended

- Recommended tire size: 27.5 x 1.95" - 2.8”

- Color: Pelham Blue

- Wt: 5.35 lbs. (Belt-Drive compatible versions weigh slightly more)

- Sizes: XS(38cm), SM(41cm), MD(44cm), LG(47cm)


Riff v.1 (27.5″ Trail Hardtail) [RETIRED]

  • Gates Carbon Belt Drive Suggestions

    Rohloff Hub:
    46t front x20t rear x 113 belt - 437.7mm chainstay setting

    Single Speed:
    46t front x28t rear x118 belt - 444.5mm chainstay setting

  • Component Fit Information:

    Bottom bracket shell: 73mm wide with English threading
    Headset type: Will take forks with 1-1/8" steerers with a ZeroStack 44 headset or tapered steerers with a ZS44 upper assembly and external cup (EC44) lower assembly
    Seatpost size: 31.6mm OD x 400+mm length Includes internal routing port at seat tube for dropper seatposts
    Seat collar size: 34.9mm
    Front derailleur clamp diameter: 34.9mm
    Front derailleur type: Low clamp, top-pull
    Hub fit: Standard dropouts fit 142x12mm thru-axle . (There are IRD Broski aftermarket inserts to convert to 135mm QR hubs)
    Chainstay adjustment range: 427 - 445mm (ideal to keep dropout in the center or front of the slot)
    Max. weight including rider and cargo: 270 lbs.

Riff v.1 (27.5″ Trail Hardtail) [RETIRED]

  • Riff with Belt Drive

    “I wanted to write to tell you that I am really liking my Soma Riff. At 5'8", I am probably borderline too small for the large frame, but the way I have it set up just works. Running a 40mm stem and Jones bars with 2.5" rise. Brooks flyer with thudbuster floats over bumps. 120mm Reba up front. Rohloff with gates belt, love it! The Riff is very quick and responsive, and so comfortable to ride for hours. I plan on this being my bikepacking bike. Not as fast as those lightweight carbon fiber gravel bikes, but I've never been too comfortable on those. Don't think I've enjoyed riding any bike as much as this one since I was a kid.”

    Chris, ,

  • Testimonial Title

    “follow up soma riff frame (27.5). i'm 5'10' 150 pounds and ordered size small. i just built this frame w/ 2x10 xt groupset / manitou markour shock / niner rdo carbon seat post. it is basic, light (24pds) and a blast to ride. the reach is comfortable (not too long) and the wheel size makes bike feel fast but maneuverable.. the rdo niner seat post has 6mm rear shock absorb so takes some rattle off your rear. soma riff = great frame... suggestion - if between sizes order smaller size.”

    Robin, Performance Bicycle,