Alchemy Arktos 29 ST XTR

2019 MountainTrail Manufacturer page

Last known price: $9,499

Prices shown first for United States
Travel: 140 / 120 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 32t / 11–51t
Gear range: 464%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–170
MD 165.1–177.8
LG 175.3–188
XL 180.3–195.6

Components

17 of 17 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket
- Shimano
Cassette
- Shimano XTR CS-M9100-12 11–51t
CS-M9100-12
Chain
- Shimano XTR CN-M9100
CN-M9100
Crankset
- Shimano XTR FC-M9100-1 12 speeds 32t
FC-M9100
Rear derailleur
- Shimano XTR RD-M9120-SGS
RD-M9120-SGS
Shifters
- Shimano XTR SL-M9100
SL-M9100

Brakes

2 parts

Wheels and tires

2 parts

Cockpit and contact points

5 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 447mm

Stack 628mm

Wheelbase 1175mm

Head angle 66.1°

Seat angle 75.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	421	447	454	485
Stackmm	619	628	642	655
Top tube lengthmm	578	608	627	663
Seat tube lengthmm	410	450	483	518
Head tube lengthmm	100	110	125	140
Head tube angle	66.1°	66.1°	66.1°	66.1°
Seat tube angle	75.5°	75.5°	75.5°	75.5°
Chainstay lengthmm	436	436	436	436
Wheelbasemm	1155	1175	1199	1236
Front centermm	722	742	766	803
Bottom bracket dropmm	41	41	41	41
Bottom bracket heightmm	336	336	336	336
Standover heightmm	788	790	798	826
Fork rakemm	40	31	41	41
Trailmm	122	132	121	121
Stack/reach ratio	1.47	1.41	1.41	1.35

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon

Suspension

Suspension configuration: Full suspension
Front travel: 140 mm
Rear travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 51
Lowest gear: 18.2 in
Highest gear: 84.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.3″
Wheel material: Carbon
Wheel size: 29″

Technical analysis

4 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

140 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 982 bicycles with this information
Coverage: 96.6% of the class

Lowest gear

18.2 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 964 bicycles with this information
Coverage: 94.8% of the class

Highest gear

84.4 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 964 bicycles with this information
Coverage: 94.8% of the class

Shifting

Mechanical

34 of 1,016 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2019
Sample: 1,016 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.0 km/h
Highest gear: 32.3 km/h

Total gear range 464%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 18.2–84.4 gear inches
Class reference (p10–p90): 16.5–92.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2019
Lowest gear: 964 bicycles with this information, 94.8% of the class
Highest gear: 964 bicycles with this information, 94.8% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2019 builds

Differences across 2019 builds
Specification	This bicycle Alchemy Arktos 29 ST XTR	Alchemy Arktos 27.5 GX Eagle	Alchemy Arktos 27.5 LE GX Eagle	Alchemy Arktos 27.5 LE NX Eagle	Alchemy Arktos 27.5 LE X01 Eagle	Alchemy Arktos 27.5 LE XT 12 speed
Suspension
Front travel	140 mm	160 mm	160 mm	160 mm	160 mm	160 mm
Rear travel	120 mm	160 mm	152 mm	152 mm	152 mm	152 mm
Drivetrain
Smallest sprocket	11	10	10	11	10	10
Largest sprocket	51	50	50	50	50	51
Lowest gear	18.2 in	17.6 in	17.6 in	17.6 in	17.6 in	17.3 in
Highest gear	84.4 in	88.0 in	88.0 in	80.0 in	88.0 in	88.0 in
Other specifications
Tire width	2.3″	2.5″	2.5″	2.5″	2.5″	2.5″
Wheel material	Carbon	Aluminum	Aluminum	Aluminum	Aluminum	Aluminum
Wheel size	29″	27.5″	27.5″	27.5″	27.5″	27.5″