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Chromag

Rootdown 27.5+ 29" Frame

  • Sale
  • $1,449


Big wheels, all mountain

In 2016 Chromag 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. 2019 now brings some colour updates!

Built with Chromag's 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

2019 Colours

Black, Yellow, Blue


Please note that these frames are made in small batches. Please contact Bike Brew for colour and sizing availability before purchasing. All prices shown include 10% GST.

Geometry

   
Chainstay 16.3" 415mm
Headtube 4.1" 105mm
Head Angle 65°
Seattube Angle 75°
BB Height 12.6" 320mm
Seatpost Size 31.6mm
Headset Size 44mm/56mm
Ft. Derailleur Size 34.9mm
BB Shell BB92
*measured with a 160mm fork.  Optimal 150-170mm.

Sizing

S M M/L L XL
TYPICAL RIDER HEIGHT 5'2"- 5'7"
156 - 170cm
5'5"- 5'10"
165 - 178cm
5'8" - 6'2"
173 - 188cm
6' - 6'4"
183 - 193cm
6'3" - 6'7"
190 - 201cm
TOPTUBE LENGTH (EFFECTIVE) 22.75"
578mm
23.75"
603mm
24.5"
622mm
25.5"
648mm
26.25"
667mm
SEATTUBE LENGTH (C-TOP) 15.5"
394mm
17"
432mm
18.5"
470mm
19.5"
495mm
21"
533mm
REACH 410mm 428mm 447mm 473mm 492mm
STACK 647mm 653mm 653mm 653mm 653mm