Chromag Rootdown Frame - The Inside Line Mountain Bike Service Ltd.

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Chromag Rootdown Frame

$890.00 $1,050.00
In store: Check availability

Available in store

Article number: CR201-130-02

The Rootdown is a staff favourite! It makes your "average" trail come to life, with an unbelievably short rear end and compliant chromoly steel construction, the Rootdown is incredible.


Geometry Specifications


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

4130 Steel

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, giving Chromag 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, meaning we can use less material and achieve a product that can withstand the abuse that riders love to throw at it.

Shop Thoughts

The Rootdown offers something for everyone from seasoned vets to first time riders. The reactivity of hardtails allows them to be great learning devices for everyone. Paired with its ability to run 27.5 plus tires, you can truly ride this bike year round.

In MM Small Medium Medium-Large Large X-Large
A Reach 421 446 463 487 503
B Stack 630 630 639 648 657
C Head Tube Length 95 95 105 115 125
D Head Tube Angle 64° 64° 64° 64° 64°
E Front Center  757 782 803 830 852
F Wheel Base 1177 1202 1223 1251 1272
G Rear Center 420 420 420 420 420
H Bottom Bracket Drop 50.8 50.8 50.8 50.8 50.8
I Bottom Bracket Height 320 320 320 320 320
J Seat Tube Angle 76° 76° 76° 76° 76°
K Seat Tube Length 368 406 431 456 494
L Bike Standover 677 714 738 762 799
M Effective Top Tube Length 578 603 622 648 667
N Offset 44 44 44 44 44
O Axle To Crown Contact Contact Contact Contact Contact
P Suggested Rider Height 5'1" - 5'5" 5'4" - 5'8" 5'7" - 6' 5'11" - 6'3" 6'2" - 6'6"


Fork Size 160mm ± 10mm
Shock Size / Travel  
Shock Hardware  
Seatpost Size / Clamp Size 31.6mm/35mm
Headset Size zs44/zs56
Bottom Bracket Sram 92mm PF
Rotors Front / Rear 180mm/180mm
Rear Wheel Spacing 148mm
Crank Chainline 52mm
Post Mount 180mm
Derailleur Hanger Chromag C1


Making Your Bike Purchase Special

If you have any questions about choosing a bike, don't hesitate to contact our team of professionals to help guide you through the processes. We will reach out to you after the purchase to find the optimal set up for your riding style and weight.

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