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NS Bikes Eccentric Alu 29 Black Mountain Bike
- $529.16
- Brands NS Bikes
- Product Code: NSB-00368
- Availability: In Stock
NS Bikes Eccentric Alu 29 – BlackThe NS Bikes Eccentric Alu 29 Black is an aggressive hardtail mountain bike designed for riders who want speed, control, and a direct connection to the trail. Built around a lightweight AL6061-T6 aluminum frame, this 29er combines modern geometry with a 140mm suspension fork, a dropper post, Shimano Deore 1x12 drivetrain, and hydraulic disc brakes.Its long reach, s..
Available Options
Durable 29 Inch Mountain Bike for Trail and Freeride Riding
NS Bikes Eccentric Alu 29 – Black
The NS Bikes Eccentric Alu 29 Black is an aggressive hardtail mountain bike designed for riders who want speed, control, and a direct connection to the trail. Built around a lightweight AL6061-T6 aluminum frame, this 29er combines modern geometry with a 140mm suspension fork, a dropper post, Shimano Deore 1x12 drivetrain, and hydraulic disc brakes.
Its long reach, slack 65° head angle, short 430mm chainstays, and large 29-inch wheels give the Eccentric Alu 29 a confident character on descents while keeping the bike playful enough for technical and flowing trails. NS Bikes positions the Eccentric as a hardtail for riders who enjoy pushing their bikes on demanding terrain.
Key Features
Lightweight AL6061-T6 aluminum frame
Custom-formed and butted frame tubes
Aggressive 29er trail geometry
RockShox Recon 140mm suspension fork
X-Fusion Manic internal dropper post
Shimano Deore 1x12-speed drivetrain
Shimano Deore hydraulic disc brakes with 180mm rotors
Shimano Deore 32T crankset
SunRace 11-51T 12-speed cassette
29-inch tubeless-compatible Octane One Solar wheels
Maxxis DHF and Aggressor 29 × 2.5" EXO/TR tires
Boost 148 × 12mm rear spacing
Compatible with 27.5+/650B+ wheels
Available in S, M, and L sizes
Lightweight Aluminum Frame
The Eccentric Alu 29 uses an NS Bikes AL6061-T6 aluminum frame with custom-formed and butted tubing. The frame is built around Boost 148 × 12mm rear spacing and features an integrated tapered head tube.
At approximately 2.3kg for a medium frame without the axle, the frame balances strength and weight while providing a solid platform for aggressive hardtail riding.
The frame also includes internal routing for a dropper post and is designed specifically around a single-chainring drivetrain.
Aggressive 29er Geometry
The Eccentric Alu 29 uses modern trail geometry with a 65° head angle and 74° effective seat angle. The long reach and low bottom-bracket position help create a stable platform on steep terrain, while the 430mm chainstays help keep the bike responsive.
Reach ranges from 425mm on size S to 475mm on size L, allowing riders to select a frame that better matches their height and riding preferences.
RockShox Recon 140mm Fork
Up front, the bike is equipped with a RockShox Recon suspension fork offering 140mm of travel. It uses a tapered steerer, a 44mm offset, and a 15 × 110mm Boost front axle.
The frame is designed around forks in the 120–140mm travel range, with 140mm used on the complete bike. This gives the Eccentric Alu 29 the suspension capability expected from a modern aggressive hardtail.
Shimano Deore 1x12 Drivetrain
The Eccentric Alu 29 uses a Shimano Deore M6100 12-speed drivetrain. A single front chainring simplifies shifting while the wide-range cassette provides the gearing needed for both climbs and fast trail sections.
The drivetrain includes:
Shimano Deore M6100 12-speed rear derailleur
Shimano Deore M6100 12-speed shifter
Shimano Deore FC-MT5101 crankset
32T chainring
SunRace CSMZ800 12-speed cassette
11-51T cassette range
Shimano 12-speed chain
The frame supports a maximum chainring size of 32T with Boost-compatible setups.
Shimano Hydraulic Disc Brakes
Powerful and controllable braking comes from Shimano MT410 hydraulic disc brakes with 180mm rotors front and rear.
This braking setup is well matched to the bike's aggressive trail orientation, providing useful speed control on steep descents, technical sections, and fast trail riding.
Dropper Post for Descents
The X-Fusion Manic internal dropper post allows the rider to lower the saddle from the handlebar while riding. This creates more room for body movement when descending, cornering, or navigating technical terrain.
The supplied dropper length varies by frame size:
S: 125mm
M: 125mm
L: 150mm
The frame uses a 31.6mm seatpost and 34.9mm seat clamp.
29-Inch Wheels and Maxxis Tires
Large 29-inch wheels help the Eccentric Alu 29 maintain momentum and roll smoothly over roots, rocks, and uneven trail surfaces.
The complete bike uses Octane One Solar 29-inch tubeless-compatible rims with 32 spokes. Tire specifications are:
Front: Maxxis DHF EXO/TR 29 × 2.5" WT
Rear: Maxxis Aggressor EXO/TR 29 × 2.5" WT
The frame is designed to accept standard 29-inch tires up to 2.3 inches according to NS Bikes' maximum recommended frame clearance, while the supplied complete-bike configuration is listed with 2.5-inch tires. This distinction is worth noting when replacing or changing tires.
The frame can also accommodate 27.5+/650B+ wheels with tires up to 3.0 inches, providing additional setup flexibility.
Complete Specifications
| Specification | Details |
|---|---|
| Brand | NS Bikes |
| Model | Eccentric Alu 29 |
| Color | Black |
| Bike Type | Hardtail Mountain Bike |
| Intended Use | Category 4 – XC & Trail |
| Wheel Size | 29" |
| Frame Material | AL6061-T6 Aluminum |
| Frame Construction | Custom formed and butted tubes |
| Frame Sizes | S / M / L |
| Frame Weight | Approx. 2.3kg, M size, without axle |
| Fork | RockShox Recon |
| Fork Travel | 140mm |
| Fork Offset | 44mm |
| Front Axle | 15 × 110mm Boost |
| Steerer | 1.5" tapered |
| Headset | GW Integrated Tapered IS42/IS52 |
| Stem | Octane One Tone, 31.8mm, 45mm |
| Handlebar | NS Bar, 780mm, 20mm rise |
| Grips | NS Hold Fast |
| Dropper Post | X-Fusion Manic Internal |
| Dropper Travel | S/M: 125mm; L: 150mm |
| Seatpost Diameter | 31.6mm |
| Seat Clamp | 34.9mm |
| Saddle | Octane One Rocket2, CrMo hollow rails |
| Front Brake | Shimano MT410, 180mm |
| Rear Brake | Shimano MT410, 180mm |
| Crankset | Shimano Deore FC-MT5101, 170mm |
| Chainring | 32T |
| Drivetrain | Shimano Deore 1 × 12 |
| Rear Derailleur | Shimano Deore M6100, 12-speed |
| Shifter | Shimano Deore M6100, 12-speed |
| Cassette | SunRace CSMZ800, 12-speed, 11-51T |
| Chain | Shimano, 12-speed |
| Front Hub | NS Rotary 15 Boost, 15 × 110mm |
| Rear Hub | NS Rotary Cassette, 12 × 148mm Boost |
| Rims | Octane One Solar 29", 32h, tubeless compatible |
| Front Tire | Maxxis DHF EXO/TR 29 × 2.5" WT |
| Rear Tire | Maxxis Aggressor EXO/TR 29 × 2.5" WT |
| Bottom Bracket | Shimano BSA, 73mm |
| Rear Spacing | 148 × 12mm Boost |
| Maximum Recommended 29" Tire | 29 × 2.3" |
| 27.5+/650B+ Clearance | Up to 3.0" |
| Maximum Chainring | 32T with Boost |
| Disc Mount | Post Mount |
| Front Derailleur | Not supported |
| Pedals | Not included |
Specifications are based on the NS Bikes Eccentric Alu 29 listing. NS Bikes states that specifications may change without notice, and actual colors or design details may vary slightly from images.
Geometry
| Geometry | S | M | L |
|---|---|---|---|
| Wheel Size | 29" | 29" | 29" |
| Fork Travel | 140mm | 140mm | 140mm |
| Reach | 425mm | 450mm | 475mm |
| Front Center | 760mm | 779mm | 809mm |
| Standover | 745mm | 767mm | 802mm |
| Stack | 641mm | 641mm | 650mm |
| Effective Top Tube | 609mm | 634mm | 662mm |
| Actual Top Tube | 583mm | 603mm | 629mm |
| Seat Tube | 412mm | 450mm | 500mm |
| Chainstay | 430mm | 430mm | 430mm |
| BB Rise | -60mm | -60mm | -60mm |
| Head Angle | 65° | 65° | 65° |
| Effective Seat Angle | 74° | 74° | 74° |
| Wheelbase | 1183mm | 1203mm | 1232mm |
Recommended Riding
The NS Bikes Eccentric Alu 29 is well suited to:
XC and aggressive trail riding
Technical singletrack
Fast-flowing trails
Steep descents
Rocky and root-filled terrain
Trail riding with jumps and natural features
Riders who prefer the direct feel of a hardtail
Riders looking for a capable 29-inch trail bike
Why Choose the NS Bikes Eccentric Alu 29?
The NS Bikes Eccentric Alu 29 Black combines a lightweight aluminum frame with aggressive modern geometry and a practical trail-oriented component package. Its 140mm RockShox Recon fork, 29-inch wheels, X-Fusion dropper, and Shimano Deore 1x12 drivetrain make it ready for everything from everyday trail rides to more demanding descents.
Unlike a conventional lightweight XC hardtail, the Eccentric Alu 29 is designed with a more aggressive riding position and slack front end. The result is a hardtail that remains efficient on climbs while giving the rider confidence when the trail points downward.
In short: if you want a 29er hardtail with modern geometry, a wide-range 12-speed drivetrain, substantial front suspension, and a dropper post straight from the factory, the Eccentric Alu 29 is a strong choice for aggressive trail riding.
Model-year note: NS Bikes has used the Eccentric Alu 29 name across several model years. Older versions can differ in drivetrain, brakes, wheels, tires, and other components. The specifications above follow the current official specification, while the black color is also documented on 2022 retail listings.
