A few new 2017 Chromag Frames landed at the shop a few weeks ago. This Rootdown BA has been sitting quietly in it's box as I build up a Surface and Monk frame. I decided to shed some light on this frame, here are a few details from Chromag:
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.
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
For sizing and geometry follow the link below...
Frame Price: $688.00