Arktos 29
Carbon // 29" // 140MM rear // 160MM front // Starting at $2999
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.
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 29. The bike features details like internal cable routing and a direct mount chain guide, as well as every bike features Fox Factory suspension. 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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Geometry
| S | M | L | XL | |
|---|---|---|---|---|
| 160mm Fork | 44mm Offset Fork | ||||
| Seat Tube Length | 410 | 450 | 483 | 518 |
| Effective Top Tube | 580 | 610 | 630 | 665 |
| Head Tube Length | 100 | 110 | 125 | 140 |
| Head Tube Angle | 65.5 | 65.5 | 65.5 | 65.5 |
| Frame Stack | 620 | 630 | 644 | 658 |
| Frame Reach | 418 | 444 | 452 | 483 |
| Seat Tube Angle | 75 | 75 | 75 | 75 |
| Chain Stay Length | 438.5 | 438.5 | 438.5 | 438.5 |
| Bottom Bracket Drop | 34 | 34 | 34 | 34 |
| Bottom Bracket Height | 343 | 343 | 343 | 343 |
| Wheelbase | 1167 | 1185 | 1211 | 1248 |
| Standover | 792 | 794 | 802 | 830 |
Pricing and specifications subject to change at any time without notice.
| S | 5'1 - 5'5" | ||||
| M | 5'5" - 5'9" | ||||
| L | 5'9" - 6'1" | ||||
| XL | 6'1" - 6'5" | ||||
Specs
| SRAM NX Eagle | SRAM NX Eagle+ | SRAM GX Eagle | Shimano XT 12 Spd | SRAM X01 Eagle | Shimano XTR | |
|---|---|---|---|---|---|---|
| Price | $4,899 | $5,199 | $5,399 | $6,099 | $6,699 | $9,499 |
| Fork | RockShox Pike Select RC 160mm 15mm | DVO Diamond D1 29 160mm 15mm 44mm | Fox 36 29 Factory Grip 2 160mm Boost 15mm | Fox 36 29 Factory Grip 2 160mm Boost 15mm | Fox 36 Factory Grip 2 160mm Boost 15mm | Fox 36 Factory Grip 2 160mm Boost 15mm |
| Shock | Fox DPX2 Factory Kashima EVOL LV 3-Position | DVO Topaz T3 3-Postion Adjust | Fox DPX2 Factory Kashima EVOL LV 3-Position | Fox DPX2 Factory Kashima EVOL LV 3-Position | Fox DPX2 Factory Kashima EVOL LV 3-Position | Fox DPX2 Factory Kashima EVOL LV 3-Position |
| Handlebar | Race Face Aeffect R 35×780 | Race Face Aeffect R 35×780 | Race Face Aeffect R 35×780 | Race Face Aeffect R 35×780 | Race Face Turbine R 35×780 | ENVE M6 Carbon 31.8×780 |
| Stem | Race Face Aeffect R 50mm | Race Face Aeffect R 50mm | Race Face Aeffect R 50mm | Race Face Aeffect R 50mm | Race Face Turbine R 50mm | ENVE M6 55mm 31.8mm |
| Seat Post | X-Fusion Manic 150mm | X-Fusion Manic 150mm | X-Fusion Manic 150mm | Fox Factory Transfer 150mm | Fox Factory Transfer 150mm | Fox Factory Transfer 150mm |
| Grips | DMR Deathgrip Thin | DMR Deathgrip Thin | DMR Deathgrip Thin | DMR Deathgrip Thin | DMR Deathgrip Thin | DMR Deathgrip Thin |
| Headset Top | Cane Creek 40-Series IS42 | Cane Creek 40-Series IS42 | Cane Creek 40-Series IS42 | Cane Creek 40-Series IS42 | Cane Creek 40-Series IS42 | Cane Creek 40-Series IS42 |
| Headset Bottom | Cane Creek 40-Series IS52 | Cane Creek 40-Series IS52 | Cane Creek 40-Series IS52 | Cane Creek 40-Series IS52 | Cane Creek 40-Series IS52 | Cane Creek 40-Series IS52 |
| Spacer | Cane Creek 40-Series 5MM Spacer | Cane Creek 40-Series 5MM Spacer | Cane Creek 40-Series 5MM Spacer | Cane Creek 40-Series 5MM Spacer | Cane Creek 40-Series 5MM Spacer | Cane Creek 40-Series 5MM Spacer |
| Saddle | WTB Volt | WTB Volt | WTB Volt Race | WTB Volt Race | WTB Volt Race | WTB Volt Race |
| Shifters | SRAM SL NX Eagle | SRAM SL NX Eagle | SRAM GX Eagle | Shimano XT 12 Speed | SRAM X01 Eagle | Shimano XTR 12 Speed |
| Rear Derailleur | SRAM SL NX Eagle | SRAM SL NX Eagle | SRAM GX Eagle | Shimano XT 12-speed Shadow+ | SRAM X01 Eagle | Shimano XTR 12-SPEED |
| Cassette | SRAM NX Eagle 11-50T | SRAM NX Eagle 11-50T | SRAM GX 1275 Eagle 10-50T | Shimano XT 12-Speed 10-51t | SRAM XG 1275 EAGLE 10-50T | Shimano XTR 12-Speed 11-51t |
| Cranks | SRAM Descendant 175mm | SRAM Descendant 175mm | SRAM GX EAGLE 170mm | Shimano XT 170mm | SRAM X01 EAGLE 175mm | Shimano XTR 170mm |
| Bottom Bracket | SRAM DUB BSA SB+ | SRAM DUB BSA SB+ | SRAM DUB BSA SB+ | Shimano XT Threaded | SRAM DUB BSA SB+ | Shimano XTR Threaded |
| Chain | SRAM NX Eagle | SRAM NX Eagle | SRAM GX Eagle | Shimano XT 12 Speed | SRAM GX Eagle | Shimano XTR 12 Speed |
| Brakes | SRAM Guide T | SRAM Guide T | Shimano XT | Shimano XT | Shimano XT | Shimano XTR Trail |
| Rotors | SRAM 180mm Centerline | SRAM 180mm Centerline | Shimano 180mm Center Lock | Shimano 180mm Center Lock | Shimano 180mm Center Lock | Shimano XTR M900 180mm Center Lock |
| Front Wheel | Industry Nine 29 Enduro S Hydra 15/110mm | Industry Nine 29 Enduro S Hydra 15/110mm | Industry Nine 29 Enduro S Hydra 15/110mm | Industry Nine 29 Enduro S Hydra 15/110mm | Industry Nine 29 Enduro S Hydra 15/110mm | ENVE M630 or M730 15/110mm Industry 9 |
| Rear Wheel | Industry Nine 29 Enduro S Hydra 12/157mm Boost+ | Industry Nine 29 Enduro S Hydra 12/157mm Boost+ | Industry Nine 29 Enduro S Hydra 12/157mm Boost+ | Industry Nine 29 Enduro S Hydra 12/157mm Boost+ | Industry Nine 29 Enduro S Hydra 12/157mm Boost+ | ENVE M630 or M730 12/157mm Industry 9 |
| Tires | Maxxis Minion DHF 29×2.3, Maxxis Minion DHR 29×2.3 | Maxxis Minion DHF 29×2.3, Maxxis Minion DHR 29×2.3 | Maxxis Minion DHF 29×2.5, Maxxis Minion DHR 29×2.4 | Maxxis Minion DHF 29×2.5, Maxxis Minion DHR 29×2.4 | Maxxis Minion DHF 29×2.5, Maxxis Minion DHR 29×2.4 | Maxxis Minion DHF 29×2.5, Maxxis Minion DHR 29×2.4 |
Pricing and specifications subject to change at any time without notice.