"I want a bike that is lawless. I want to be able to descend anything I find myself above but I want to get up there with minimum of fuss and maximum speed, which is why I want a 29er. Too many people discredit 29ers as being only for old guys and cross-country racers, but bikes like the Rootdown defy small-minded definition. I’ve tried my hand at all types of mountain biking but after years of searching I realized I just like being out on the trails and that specific categorization is a waste of time. I just want to fly through the woods, feel the loam flick up on my shins, and never have to worry about wiping the grin off my face."
Big wheels, all mountain
In 2016 we updated the Rootdown frame with a combination of longer top tube, shorter chain stay, slacker head angle, steeper seat tube and lower BB. For us it was a significant progression of all mountain hardtail. The new 2017 version continues that legacy further with the additional clearance needed for 27.5 Plus tire compatibility.
Built with our custom-drawn tubes and featuring a 12 X 148 Boost rear end and stealth post routing, this is the evolution of Chromag frame design in 29er form compatible to 27.5+. An agile ascender and a dominant descender that is ready for anything.
- Chromag’s own trail honed geometry
- Custom Chromoly tube set
- Chainstay length optimized at 413mm
- CNC machined headtube tapered 44-56mm ZS
- Designed around a 160mm fork (ideal range 150-170mm)
- Head Angle 65 degrees – 160mm fork
- Seat Angle 75 degrees
- BB height 12.6” / 320mm (with std 29” tire)
- BB Shell: BB92
- 1X drivetrains only
- Max chainring size of 32T (Boost chainline)
- Custom CNC machined dropouts, yokel and zip guides.
- 12x148mm Maxle
- 31.6 seat tube, stealth routed
- Up to 29 x 2.5 or 27.5 x 3.0 tire clearance
- Handmade in our Taiwan partner factory
- 6.5lb median frame weight
Charcoal, Stellar Blue, Military Green
Head tube badges
Bikes are special. The headtube badge is the finishing touch so we’ve always made a point of taking the time to do something interesting with it. Our headtube badges have changed over the years and are an indication of the time each bike was made. Whether it’s a cast bronze, or polished stainless steel, water cut aluminum or a 3D CNC carving, each one represents our commitment to detail.
Our ‘Yokel’ design is a small machined junction on the chainstay that helps accommodate both tire clearance and chainring clearance. Our first versions were huge CNC yokes that bridged the entire front end of the chainstays. Over time we refined this to minimize weight by arranging our chainstay layout asymmetrically and reducing the yoke to a minimal size. It’s one of our most unique frame features and has been copied by other frame makers.
Making modern chromoly frames is challenging when most of the tubes available on the market are from an era of mountain biking long past. After several years of frame production we reached the point where we could design and produce our own custom tubing for the majority of our frame tubes. This contributes to the unique look of many of our frames but more importantly allows us to configure our bikes exactly as we want for each design.
|BB Height||12.6" 320mm|
|*measured with a 160mm fork. Optimal 150-170mm.|
|TYPICAL RIDER HEIGHT||5'2"- 5'7"
156 - 170cm
165 - 178cm
|5'8" - 6'2"
173 - 187cm
|6' - 6'4"
183 - 193cm
|6'3" - 6'7"
190 - 199cm
|TOPTUBE LENGTH (EFFECTIVE)||22.75"
|SEATTUBE LENGTH (C-TOP)||15.5"
|PARTS||GX EAGLE BUILD||EAGLE XO1 BUILD|
|FORK||Rock Shox LYRIK RC 160/130 2P||Rock Shox LYRIK RC 160/130 2P|
|STEM||Chromag HiFi 40mm||Chromag HiFi 40mm|
|HANDLEBAR||Fubars OSX 25mm Rise||Fubars OSX 25mm Rise|
|HEADSET||Cane Creek Forty ZS||Cane Creek Forty ZS|
|CRANK||SRAM GX EAGLE||SRAM X01 EAGLE|
|BRAKES||SRAM Guide RS B1||SRAM Guide RSC B1|
|ROTORS||180mm Centreline||180mm Centreline|
|SHIFTERS||SRAM GX 12 SPD||SRAM X01 EAGLE|
|CASSETTE||SRAM XG-1275||SRAM XG-1295 EAGLE 10-50|
|REAR DERAILLEUR||SRAM GX 1X12||SRAM X01 EAGLE 1X12|
|WHEELSET||CHROMAG PHASE30 Rims with CHROMAG MAGNA Hubs 27.5+ or 29||CHROMAG PHASE30 Rims with CHROMAG MAGNA Hubs 27.5+ or 29|
|TIRES||Maxxis Minion Fr/Minion Rr||Maxxis Minion Fr/Minion Rr|
|SEATPOST||Chromag Dolomite||Chromag Dolomite|
|SADDLE||Chromag Trailmaster DT||Chromag Trailmaster DT|
|GRIPS||Chromag Basis||Chromag Basis|
|CHAIN||SRAM GX EAGLE||SRAM X01 EAGLE|
|FRAME ONLY||$860 CAD
|RockShox Reverb Dropper Post optional.
*US pricing applies to all US and International purchases.
To purchase, please contact us directly. We are happy to answer all your questions about our bikes and products.