Norco Koshka

2011 MountainCross-country

Last known price: $525

Prices shown first for United States
Fork travel: 100 mm
Wheels: 26″
Drivetrain: 3 × 8 24–42t / 11–32t
Gear range: 509%
Weight: 14.74 kg 32.5 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Mechanical disc

Rider height by size (cm)

Size guide

XS 151–164
SM 159–170
MD 165–177
LG 171–184

Components

16 of 23 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

Forma double butted 7005 alloy frame Not identified

Suspension

2 parts

Fork
- SR Suntour
Rear shock

None

Drivetrain

8 parts

Bottom bracket
- FSA
BB-7420ST
Cassette
- Shimano CS-HG30 11–32t
CS-HG30
Chain
- KMC
Z-72
Chain tensioner

None
Crankset
- Shimano FC-M171 42/34/24t
FC-M171
Front derailleur
- Shimano FD-M190
FD-M190
Rear derailleur
- Shimano Alivio RD-M430
RD-M430
Shifters
- Shimano Altus SL-M310
SL-M310

Brakes

2 parts

Brake levers

WSD alloy lever Not identified
Brakes
- Tektro

Wheels and tires

5 parts

Front hub
- Formula
Rear hub
- Formula
Rims
- WTB
SX-24
Spokes

Stainless w/brass nipples Not identified
Tires
- Kenda K831A

Cockpit and contact points

7 parts

Grips
- Norco
Handlebar

Steel 30mm riser bar - Black Not identified
Headset
- FSA
TH-888
Pedals

Resin body w/steel cage - Black Not identified
Saddle
- Norco
Seatpost

Alloy - Black Not identified
Stem

Alloy 15degree - Black Not identified

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size SM

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 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Top tube lengthmm	530	545	560	575
Seat tube lengthmm	318	381	432	470
Head tube lengthmm	110	110	120	120
Head tube angle	70°	70.5°	70.5°	70.5°
Seat tube angle	74°	73.5°	73.5°	73.5°
Chainstay lengthmm	425	425	425	425
Wheelbasemm	1032	1036	1052	1067
Front centermm	609	614	629	644
Bottom bracket dropmm	43	43	43	43
Bottom bracket heightmm	300	300	300	300
Standover heightmm	699	712	733	747
Suspension and parts
Rear travelmm	137	137	137	137

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 14.74 kg

32.5 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 24
Largest chainring: 42
Rear sprockets: 8
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 19.5 in
Highest gear: 99.3 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 1.95″
Wheel material: Aluminum
Wheel size: 26″

Technical analysis

3 measures

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2011
Sample: 179 bicycles with this information
Coverage: 72.1% of the class

Lowest gear

19.5 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2011
Sample: 228 bicycles with this information
Coverage: 91.9% of the class

Highest gear

99.3 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2011
Sample: 228 bicycles with this information
Coverage: 91.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.5 km/h
Highest gear: 38.0 km/h

Total gear range 509%

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: 19.5–99.3 gear inches
Class reference (p10–p90): 16.8–116.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2011
Lowest gear: 228 bicycles with this information, 91.9% of the class
Highest gear: 228 bicycles with this information, 91.9% of the class