NS Eccentric Alu 29

2025 MountainTrail Manufacturer page

Fork travel: 140 mm
Wheels: 29″
Drivetrain: 1 × 12 32t / 11–51t
Gear range: 464%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–170
MD 168–179
LG 176–187

Components

10 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

NS Bikes AL6061-T6 custom formed and butted tubes, Boost 148x12 dropouts Not identified

Suspension

2 parts

Fork
- RockShox Recon TK 15x100
Rear shock

/ Not identified

Drivetrain

7 parts

Bottom bracket
- Shimano
Cassette
- SunRace 11–51t
Chain
- Shimano
Chain guide

/ Not identified
Crankset
- Shimano FC-MT510-1 12 speeds 32t
FC-MT510
Rear derailleur
- Shimano Deore RD-M6100 12 speeds
RD-M6100
Shifters
- Shimano Deore SL-M6100 12 speeds
SL-M6100

Brakes

1 part

Brakes
- Shimano BR-MT410
BR-MT410

Wheels and tires

5 parts

Front hub

NS Rotary 15 Boost 15x110 disc (sealed bearings) Not identified
Rear hub

NS Rotary Cassette 148x12mm Boost (sealed bearings) Not identified
Rims

Octane One Solar 29”, 32h, tubeless compatible Not identified
Spokes

Spokes w/14mm nipples Not identified
Tires
- Maxxis

Cockpit and contact points

7 parts

Grips

NS Hold Fast Not identified
Handlebar

NS Bar 31.8, 780mm 20mm rise Not identified
Headset

GW integrated tapered IS42/IS52, sealed bearings Not identified
Pedals

/ Not identified
Saddle

Octane One Rocket2, CrMo hollow rails Not identified
Seatpost
- X-Fusion
Stem

Octane One Tone 31.8, 45mm 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 head tube length, 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
Reachmm	425	450	475
Stackmm	641	641	650
Top tube lengthmm	609	634	662
Seat tube lengthmm	412	450	500
Head tube angle	65°	65°	65°
Seat tube angle	74°	74°	74°
Chainstay lengthmm	430	430	430
Wheelbasemm	1183	1203	1232
Front centermm	760	779	809
Bottom bracket dropmm	60	60	60
Bottom bracket heightmm	314	314	314
Standover heightmm	745	767	802
Fork rakemm	56	51	51
Trailmm	113	118	118
Stack/reach ratio	1.51	1.42	1.37

Not published by the manufacturer: Head tube length, 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: Aluminum

Suspension

Suspension configuration: Hardtail
Front travel: 140 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
Tire width: 2.5″
Wheel material: Aluminum
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: 2025
Sample: 1,810 bicycles with this information
Coverage: 97.5% of the class

Lowest gear

18.2 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Highest gear

84.4 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Shifting

Mechanical

388 of 1,849 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,849 bicycles with this information
Coverage: 99.6% 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): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2025
Lowest gear: 1384 bicycles with this information, 74.6% of the class
Highest gear: 1384 bicycles with this information, 74.6% 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 2025 builds
Specification	This bicycle NS Eccentric Alu 29	NS Eccentric 20	NS Eccentric 24 Blue	NS Eccentric Cromo 29	NS Eccentric Lite 1	NS Eccentric Lite 2
Frame
Frame material	Aluminum	Aluminum	Aluminum	Steel	Aluminum	Aluminum
Suspension
Front travel	140 mm	80 mm	100 mm	140 mm	120 mm	120 mm
Drivetrain
Smallest chainring	32	28	30	32	32	30
Largest chainring	32	28	30	32	32	30
Rear sprockets	12	10	10	12	12	10
Largest sprocket	51	36	36	51	51	42
Lowest gear	18.2 in	15.6 in	20.0 in	18.2 in	18.2 in	20.7 in
Highest gear	84.4 in	50.9 in	65.5 in	84.4 in	84.4 in	79.1 in
Cockpit
Seatpost	Dropper seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Rigid seatpost	Rigid seatpost
Other specifications
Tire width	2.5″	2.1″	2.35″	2.5″	2.4″	2.35″
Wheel size	29″	20″	24″	29″	29″	29″
Fork spring	Not informed	Air	Not informed	Not informed	Air	Coil