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Chromag Rootdown G2

Chromag Rootdown G2
Black frame shown but Mars (red) frame was used for this G2 build
  • Color: MARS(red)
  • Color: MARS(red)
Color: MARS(red)
Size: Medium/Large
Please select options Unavailable
This item is not permitted to be shipped. However, it can be purchased online for in store pick up or our delivery service within Toronto.


The Rootdown is Chromag's best selling bicycle.

Built with their custom-drawn tubes and featuring a 12x148mm Boost rear end and stealth post routing, this is the evolution of Chromag frame design in 29er form, compatible with tires up to 29" x 2.5 and 27.5+ up to 2.8 wheels. An agile ascender and a dominant descender that is ready for anything.

Almost all Chromag frames are made from quality 4130 chromoly steel tubing. Chromoly is an abbreviation for chromium-molybdenum indicating the materials that the steel is alloyed with.

The added chromium helps increase the steels hardenability and also provide some corrosion resistance.
The molybdenum helps to increase the toughness of the steel.

It has a high tensile strength but is also malleable which is what gives our frames their notorious ride quality and feel. Chromoly is often used when more strength is required than that of mild carbon steel.

It falls under the AISI (American Iron & Steel Institute) 41XX designations which is where the “41” comes from. The “30” indicates it contains approximately 0.30% carbon by weight.

Chromoly is much stronger than traditional 1020 steel and it has a higher strength to weight ratio and high tensile strength, which means we can use less material and achieve a product that can withstand the abuse that riders love to throw at it.

Your bike is special. The head tube badge is the finishing touch so they’ve always made a point of taking the time to do something interesting with it. Their head tube 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.

As 12mm through axles have proven to be solid, reliable and convenient, Chromag have committed most of their models to utilize this format.   Their 12mm dropouts are accurate and tough and feature a removable derailleur hanger with a sturdy interface for strength and reliability.  All models (excluding Monk and Nice Dreams) will follow the 148mm boost spacing.

Chromag's ‘Yokel’ design is a small machined junction on the chainstay that helps accommodate both tire clearance and chainring clearance. Their first versions were huge CNC yokes that bridged the entire front end of the chainstays. Over time they refined this to minimize weight by arranging their chainstay layout asymmetrically and reducing the yoke to a minimal size. It’s one of their most unique frame features and has been copied by other frame makers.

All Chromags now ship with injection moulded chain stay protectors to help keep the paint fresh and the noise low. These have an adhesive applied, but also slot for zip ties if they come unstuck years down the line, or if you want to apply it to another frame.


Fork Rock Shox Lyrik Select 160mm Boost 110x15mm
Headset Cane Creek Forty ZS
Rims/Wheels Chromag 29" Phase30 Rims
Hubs Chromag R4 Hubs
Tires Maxxis Minion DHF & DHR
Crankset SRAM GX 170mm
Chain SRAM GX Eagle
Rear Derailleur SRAM GX Eagle
Rear Cogs SRAM GX Eagle 10-52T
Shifters SRAM GX Eagle
Handlebars Chromag OSX 25mm Rise, 800mm Wide
Tape/Grips Chromag Format
Stem Chromag HiFi BSX 40mm
Brake Levers SRAM G2 RSC
Brakes SRAM G2 RSC + SRAM Centerline 180mm rotors
Pedals Sold separately
Saddle Chromag Trailmaster DT
Seat Post RockShox Reverb (150mm )

* Subject to change without notice.

Part Numbers

Option MPN Store SKU
MARS(red) / Medium/Large CRMLMARSG2 CHR319815842