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  • $1000 Off Arktos 29 XT 11 spd and NX Eagle

  • Free ENVE Wheels! Arktos 29 XT 12-Speed and X01

  • $1000 Off Arktos 27.5 Frames

  • Free Road Powermeter Upgrade: Dura Ace Models Only

  • Free Custom Geometry: Road, All Road and Gravel

Frame-Arktos 27.5

Carbon // 27.5" // 160MM rear // 160MM front

Bike Builder


Ride Now, Pay Later

Featuring Alchemy’s exclusive Sine full-suspension system
The Arktos features famed designer David Earle’s patented dual-linkage suspension platform called “Sine”. The name “Sine” derives from the shock rate, which resembles a sine wave when graphed. The design creates suspension that is regressive through the first part of the travel to absorb small bumps and provide climbing traction, is progressive in the middle to avoid wallowing on big hits or in hard, fast corners, and is regressive again in the last 15 percent of the stroke so the bike can use all of its rear-wheel travel. It’s efficient, responsive and provides downhill capabilities unparalleled in today’s crop of modern trail bikes.

It will truly transform your ride.

Frameset Features

// Exclusive Patented Sine Suspension System

The Arktos is a one-of-a-kind, do-it-all full-suspension bike designed to climb and descend with the same aplomb. The Arktos features a patented dual-linkage platform called the Sine Suspension, which was designed by suspension guru David Earle. The Sine name is derived from the way the shock rate, when graphed, resembles a sine wave. With Sine, there is regression through the first part of the travel to absorb small bumps and provide climbing traction, progression in the middle of the stroke to avoid wallowing on big hits or in hard, fast corners, and then slight regression again at end stroke to enable full use of rear wheel travel. Sine is also designed to minimize chainstay growth to improve pedaling efficiency and keep the suspension active under braking.


// Fully Triangulated Rear Swingarm

Modern trail bikes today are being ridden on terrain that only a DH bike would have tackled a few years ago. As a result, the requirements for frame stiffness are increasing every year. Luckily if you are riding an Arktos, you are riding one of the laterally stiffest bikes ever produced, and one of the big reasons for this is the full triangulated rear swingarm. The Arktos by design is made to handle all you can throw at it.

// The Details

They say the devil is in the details, and there’s not doubt we focused on the minutia with the Arktos 27.5. The bike features details like internal cable routing and a direct mount chain guide, as well as every bike features Fox Factory suspension both front and rear. The rear shock has been specially tuned for Alchemy to provide the best in pedaling efficiency and downhill performance and all of the bikes are using stiff and light Fox 36 forks.

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170mm Fork | 39mm Offset Fork
Seat Tube Length 420 455 483 518
Effective Top Tube 585 600 615 642
Head Tube Length 100 110 115 130
Head Tube Angle 65.5 65.5 65.5 65.5
Frame Stack 589 599 604 614
Frame Reach 401 415 431 448
Seat Tube Angle 73.5 73.5 73.5 73.5
Chain Stay Length 438 438 438 438
Bottom Bracket Drop 10 10 10 10
Bottom Bracket Height 346 346 346 346
Wheelbase 1161 1171 1185 1212

Pricing and specifications subject to change at any time without notice.

Frame Geometry
Height Pant Inseam (inches) Size
5 ft. 1 in. – 5 ft. 4 in. 30 Small
5 ft. 5 in. – 5 ft. 8 in. 32 Medium
5 ft. 9 in. – 5 ft. 11 in. 34 large
≥ 6 ft. 36 Xlarge
Arktos 29 Frame Sizing
S 5’1 – 5’5″
M 5’5″ – 5’9″
L 5’9″ – 6’1″
XL 6’1″ – 6’5″

Alchemy 100% Guarantee

Free Shipping on All Bikes

Not everyone can visit Alchemy, so we made things easy. When you buy a bike from us, you get free shipping. And if you need help with final assembly, contact us for a credit.

Two Weeks, Risk-Free

Purchasing your dream ride is a substantial investment, so here’s our promise: If you are not 100% satisfied with your new Alchemy Bicycle, you have two weeks from date of purchase to return it.

No Questions Returns

If at the end of two weeks you are not 100% satisfied with your new bike, call us to arrange a full refund or credit toward another Alchemy.