Fast and playful. Race and Trail. The downcountry ripper! You're going to be crushing PRs and impressing your buddies... plus you can still rip the drops and gaps with confidence.
ARKTOS | 125
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+ Size Guide
MEDIUM
LARGE
XL
5’5″ – 5’10” 5’9″ – 6’2″ 5’11’ – 6’5″ When to Size Down: Seeking more control when cornering & maneuverability
When to Size Up: Seeking more descending stability -
+ Geo Chart
flip chip – low setting Medium Large X-Large A – Frame Stack (mm) 605 613.5 621.52 B – Frame Reach (mm) 471 493.5 519.33 C – Head Tube Angle 65.75 ° 65.75 ° 65.75 ° D – Seat tube angle 77.75 ° 77.75 ° 77.75 ° E – Effective Top (mm) 600 625 652 F – Seattube length (mm) 410 445 490 G – Front to Center (mm) 768 794 823.75 H – Chain Stay Length (mm) 437 437 437 I – Wheelbase (mm) 1206 1232 1271.5 J – Stand over (mm) 718 738 748 K – Head Tube Length (mm) 100 110 120 L – Bottom Bracket Height (mm) 333 333 333 M – Bottom Bracket Drop (mm) 40 40 40
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+ Specs
Sram GX Shimano XT Sram X01 Fork Fox 34 29 Factory Kashima 130mm Boost 15mm Grip 2 Fox 34 29 Factory Kashima 130mm Boost 15mm Grip 2 Fox 34 29 Factory Kashima 130mm Boost 15mm Grip 2 Shock Fox Float X Factory Kashima EVOL LV 3-Position Adjust 210x50mm Fox Float X Factory Kashima EVOL LV 3-Position Adjust 210x50mm Fox Float X Factory Kashima EVOL LV 3-Position Adjust 210x50mm Handlebar TAG Metals T1 Aluminum 35mm Clamp 800mm Wide 20mm Rise TAG Metals T1 Carbon 35mm Clamp 800mm Wide 20mm Rise TAG Metals T1 Carbon 35mm Clamp 800mm Wide 20mm Rise Stem TAG Metals T1 CNC Aluminum 35mm Clamp 45mm Length TAG Metals T1 CNC Aluminum 35mm Clamp 45mm Length TAG Metals T1 CNC Aluminum 35mm Clamp 45mm Length Seat Post Fox Factory Transfer 175mm w/ Lever Fox Factory Transfer 175mm w/ Lever Fox Factory Transfer 175mm w/ Lever Grips DMR Deathgrip Thin DMR Deathgrip Thin DMR Deathgrip Thin Headset Top Cane Creek 40-Series IS42 Short Cover – Top – Black Cane Creek 40-Series IS42 Short Cover – Top – Black Cane Creek 40-Series IS42 Short Cover – Top – Black Headset Bottom Cane Creek 40-Series IS52 – Top – Black Cane Creek 40-Series IS52 – Top – Black Cane Creek 40-Series IS52 – Top – Black Spacer Cane Creek 40-Series 5mm (3) Black Cane Creek 40-Series 5mm (3) Black Cane Creek 40-Series 5mm (3) Black Saddle Selle Italia X-Base FeC Alloy Selle Italia X-Base FeC Alloy Selle Italia X-Base FeC Alloy Shifters Sram GX Eagle Shimano XT M8100 12 Speed Sram X01 Eagle Rear Derailleur Sram GX Eagle 12 Speed Shimano XT M8100 12 Speed Sram X01 Eagle 12 Speed Cassette Sram XG-1275 Eagle 10-52t Shimano XT M8100 12 Speed 10-51t Sram XG-1275 Eagle 10-52t Cranks Sram GX Eagle SB+ DUB 170mm BLK 32t Shimano XT M8130-1 170mm 32t Sram X01 Eagle SB+ DUB 170mm BLK 32t Bottom Bracket Sram DUB BSA Threaded Shimano XT BSA Threaded Sram DUB BSA Threaded Chain Sram GX Eagle 12 Speed Shimano XT 12 Speed Sram GX Eagle 12 Speed Brakes Sram G2 R Shimano XT M8120 Hydraulic 4 Pot Sram G2 RSC Rotors Sram 6-Bolt 180mm F/R Shimano 6-Bolt 180mm F/R Sram 6-Bolt 180mm F/R Front Wheel Industry Nine 29 Enduro-S Hydra 30.5mm 6-Bolt 15/110mm Industry Nine 29 Enduro-S Hydra 30.5mm 6-Bolt 15/110mm Industry Nine 29 Enduro-S Hydra 30.5mm 6-Bolt 15/110mm Rear Wheel Industry Nine 29 Enduro-S Hydra 30.5mm 6-Bolt 12/157mm SB+ TA XD Industry Nine 29 Enduro-S Hydra 30.5mm 6-Bolt 12/157mm SB+ TA XD Industry Nine 29 Enduro-S Hydra 30.5mm 6-Bolt 12/157mm SB+ TA XD 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 29×2.3, Maxxis Minion DHR 29×2.3
Why the Arktos 125?
The New Arktos 125 is the perfect blend of fast and fun. Shorter travel means more efficiency, with a super-responsive and nimble frame. Is it a XC bike? Nah… This thing is made to be ridden hard, and built up so it can take a beating. Beat your buddies uphill, then impress the group with some full-send-ability.
The Arktos has unlocked the power of modern geo, now with improved linkage for more travel and advanced kinematics. Our signature Sine Suspension virtually eliminates ‘pedal bob’, providing instant, efficient, forward power to attack climbs, rollers and sprints.
When it’s time to get sendy, the 130mm/125mm of FOX Factory, Kashima-coated front/rear suspension punches well above its weight.
If you like to pedal, the Arktos 125 will surely be your new favorite ride.
One Model to RIDE Them All:
Conversion Kits:Quickly transform your 125 into a 140 or even a 150 (and back again) with Alchemy’s conversion kits: Get two (or three) bikes in one – for a fraction of the cost of buying a second bike – and always have the ideal rig for your immediate riding plans. Kits include corresponding shock and fork, and any necessary links for changes.
RIP UPHILL. PLAY DOWNHILL.
Travel Guide
130F/120R
You have as much (more?) fun powering uphill as you do ripping down. Our alchemists have blended the best of both for your ideal bike: the Arktos 120.
150F/135R
Whether it’s North Shore gnar, Southwest slickrock, Northeast mud and roots, or your own hometown hills, the Arktos 135 is always ready to play, and the bigger and bumpier the playing field, the happier you’ll both be!
170F/150R
Like to get ROWDY when you ride? Is it all about high-speed thrills? Is bigger always better? If you answered “yes” to any of these, the Arktos 150 is definitely the bike for you.
Media Reviews
Bike Details
Exclusive SINE Suspension System
The ARKTOS features the Sine Suspension System Alchemy’s patented dual-linkage platform and latest evolution of an anti-squat full suspension system.
Designed with David Earle after the Sine wave, the Sine Suspension provides next-level performance, and allows the bike to tear up climbs yet descend the roughest terrain with ease. We truly believe it is the best suspension system out there.
THE ALCHEMY FLIP CHIP
The ARKTOS features a flip chip modification that now offers the ability to transform the ARKTOS from a capable, playful down-country bike with a steeper, more maneuverable geometry to a wickedly fast enduro machine.
‘Flipping the Chip’ changes the head tube and seat tube angle by +/- ¾ of a degree, which in turn changes the ride characteristics of your bike.
ALCHEMY PREMIUM CARBON
The ARKTOS features a flip chip modification that now offers the ability to transform the ARKTOS from a capable, playful down-country bike with a steeper, more maneuverable geometry to a wickedly fast enduro machine.
‘Flipping the Chip’ changes the head tube and seat tube angle by +/- ¾ of a degree, which in turn changes the ride characteristics of your bike.
