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Soma Riff Frame, Aqua Mint

Soma Riff Frame, Aqua Mint

The version 2 of the Riff offers practical updates to features and geometry without going all-in with "progressive geometry" that almost every brand has adopted. Our reason is that we wanted to keep this frame a hardtail that's great for bike packing and has a familiar-feeling on long days in the saddle on rolling terrain. "Progressive geometry," which can be awesome for steep technical trails, can feel less fun or even uncomfortable on flatter terrain.

We did opt for more reach, a slightly steeper seat angle for more efficient climbing and shorter seat tubes to benefit dropper post use. We also got rid of seat tube bottle bosses on some sizes to allow longer dropper posts to be used.

Rear hub spacing is finally BOOST 148.

Still a highlight on the Riff are the tough Broski Sliding Dropouts which allows to tune your chainstay length as well as allow you to run the bike single-speed, with derailleur gears or hub gears.


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

– Geometry is optimized for 120mm forks. Will work well with a 100mm fork, too.

– Disc brakes only (ISO tabs)

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

– S-bend seatstays and chainstays

– Rear rack and fender eyelets

– Boost 148mm rear hub spacing

– 3 pack mount and water bottle mounts on down tube (LG size has a set of water bottle mounts on the seat tube as well. Seat tube bosses are left off the other sizes to better fit with dropper posts)

– ED coating inside frame and under the paint increase rust resistance<br><br>

– Dropper post cable routing runs on downtube and inside the seat tube

– CNC-machined 44mm headtube: Will fit 1-1/8″ steerers with a ZeroStack 44 headset or fit tapered 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(not included), 400mm(or longer) post recommended. 

– Recommended tire size: 27.5 x 1.95″ – 2.8”


– XS - Wt: 5.7 lbs.

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

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