K2 Spire

2015 MountainCross-country

Travel: 120 / 100 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 3 × 9 22–42t / 11–34t
Gear range: 590%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–170
MD 168–179
LG 176–187

Components

8 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.

Frame and fork

1 part

Frame

27.5”/650B Dual Suspension HM Carbon,100mm Travel, Tapered Headtube, Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

4 parts

Cassette
- SRAM PG-950 9 speeds 11–34t
PG-950
Chain
- KMC X9 9 speeds
Crankset
- SRAM X5 10 speeds 22/32/42t
Shifters
- SRAM X5

Brakes

1 part

Brakes
- SRAM DB3
DB-3

Wheels and tires

4 parts

Front hub

Alloy Disc w/ QR15 Not identified
Rear hub

Alloy Disc 142mmX12mm Thru Axle Not identified
Spokes

Stainless 14G Not identified
Tires
- Innova
IA-2549

Cockpit and contact points

6 parts

Grips

Black Krayton MTB Not identified
Handlebar

Aluminum Flat, 9 Deg Sweep 31.8mm Bar Bore Not identified
Headset
- Kore
Saddle

Curical Womens MTB Saddle Not identified
Seatpost

Alloy Micro Adjust Not identified
Stem

Aluminum Four Bolt Clamp, 31.8mm Bar Bore Not identified

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 3 published sizes

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	550	588	625
Seat tube lengthmm	406	458	508
Head tube lengthmm	130	135	150
Head tube angle	70°	70°	70°
Seat tube angle	73.5°	73.5°	73.5°
Chainstay lengthmm	447	447	447
Wheelbasemm	1062.1	1097.9	1135.6
Front centermm	616	652	689
Bottom bracket dropmm	20	20	20
Bottom bracket heightmm	335	335	335

Not published by the manufacturer: Reach, Stack, Standover height, Fork rake, Trail, Stack/reach ratio, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: womens
Frame material: Carbon

Suspension

Suspension configuration: Full suspension
Front travel: 120 mm
Rear travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 22
Largest chainring: 42
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 17.8 in
Highest gear: 105.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2.1″
Wheel size: 27.5″

Technical analysis

3 measures

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

Front travel

120 mm

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2015
Sample: 365 bicycles with this information
Coverage: 82.5% of the class

Lowest gear

17.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2015
Sample: 410 bicycles with this information
Coverage: 92.7% of the class

Highest gear

105.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2015
Sample: 410 bicycles with this information
Coverage: 92.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.8 km/h
Highest gear: 40.2 km/h

Total gear range 590%

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: 17.8–105.0 gear inches
Class reference (p10–p90): 16.8–110.7 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2015
Lowest gear: 410 bicycles with this information, 92.7% of the class
Highest gear: 410 bicycles with this information, 92.7% of the class