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NS Bikes Zircus Blue Mountain Bike
- $286.95
- Brands NS Bikes
- Product Code: NSB-00280
- Availability: In Stock
NS Bikes Zircus Blue 26" Pump Track & Dirt BikeThe NS Bikes Zircus Blue is a compact, playful 26-inch bike designed for riders who want to build confidence with pump tracks, manuals, bunny hops, 180s, and other fundamental riding skills. Its lightweight aluminum frame combines a durable construction with geometry developed specifically for dirt-oriented riding.A 100 mm RST Dirt T fork, single-..
Available Options
Durable All Terrain Mountain Bike for Trail and Freeride
NS Bikes Zircus Blue 26" Pump Track & Dirt Bike
The NS Bikes Zircus Blue is a compact, playful 26-inch bike designed for riders who want to build confidence with pump tracks, manuals, bunny hops, 180s, and other fundamental riding skills. Its lightweight aluminum frame combines a durable construction with geometry developed specifically for dirt-oriented riding.
A 100 mm RST Dirt T fork, single-speed drivetrain, 26-inch wheels, and compact cockpit give the Zircus a responsive feel that works well for pump tracks, urban riding, and light off-road use. The bike also includes a rear derailleur hanger option, allowing the drivetrain to be converted from single speed to gears if desired.
Key Features
6061-T6 custom-formed and butted aluminum frame
Compact “Pro Dirt” geometry
26-inch wheels
RST Dirt T fork with 100 mm travel
Simple and lightweight single-speed drivetrain
10T rear driver for quick acceleration
Tektro Aries 160 mm rear disc brake
Alhonga front V-brake
Kenda Small Block 8 26 x 2.1 tires
NS Bikes cockpit with 740 mm handlebar
Designed for pump tracks, urban riding, and recreational off-road use
Optional derailleur hanger for future geared conversion
Built for Skills and Fun
The Zircus is designed around the idea of keeping riding simple and engaging. Its geometry and single-speed drivetrain make it particularly suitable for practicing techniques such as manuals, bunny hops, 180s, and pump-track riding.
The frame uses the same lightweight aluminum construction philosophy found across NS Bikes' dirt-oriented models, giving the bike a combination of strength and manageable weight for riders who spend time jumping, pumping, and maneuvering rather than simply covering long distances.
Lightweight 6061-T6 Aluminum Frame
At the center of the Zircus is an NS Bikes 6061-T6 aluminum frame made from custom-formed and butted tubes. The frame uses a one-size design and is built around a compact dirt-bike layout.
The frame accepts forks with either a standard 1 1/8-inch steerer or a tapered 1.5-to-1 1/8-inch steerer, and its threaded 68 mm bottom bracket is compatible with MTB and 3-piece BMX cranksets using a Euro-style bottom bracket.
100 mm RST Dirt T Fork
Up front, the Zircus uses an RST Dirt T fork with 100 mm of travel. The fork has a 9 mm axle and a 1 1/8-inch steerer tube.
The frame is designed to accommodate forks with 80–140 mm of recommended travel, giving riders some flexibility when modifying the bike, while the supplied 100 mm fork keeps the standard configuration focused on dirt and pump-track riding.
Simple Single-Speed Drivetrain
The Zircus uses a straightforward single-speed setup built around a 26-tooth Samox crankset and 10T rear driver. Eliminating multiple gears keeps the drivetrain relatively simple and makes it well suited to riders who want to focus on bike handling rather than gear changes.
An optional bolt-on derailleur hanger is included, so the frame can be converted to a geared setup if required.
Mixed Front and Rear Braking
The bike uses different braking systems front and rear:
Front: Alhonga V-brake
Rear: Tektro MD-M300 Aries mechanical disc brake with 160 mm rotor
This configuration provides a simple front braking setup while retaining a disc brake at the rear for consistent stopping performance. Tektro levers are used for control.
26-Inch Wheels and Kenda Tires
The Zircus rolls on 26-inch wheels fitted with Kenda Small Block 8 26 x 2.1 tires. The tire size provides a useful balance between maneuverability and stability for pump-track, dirt, and urban riding.
The frame can accommodate tires up to approximately 26 x 2.35 inches, giving riders some room to adjust the tire setup according to their preferences.
Cockpit and Rider Contact Points
The supplied cockpit is designed with dirt-oriented dimensions:
NS Drop 31.8 stem
50 mm stem length
+10° stem angle
NS 31.8 handlebar
740 mm handlebar width
30 mm handlebar rise
NS Hold Fast Unlocked grips
Octane One fat seatpost and saddle combination
This compact cockpit complements the Zircus's responsive handling and makes it easier to control the bike during jumps, manuals, and other technical movements.
Product Specifications
| Specification | Details |
|---|---|
| Brand | NS Bikes |
| Model | Zircus Blue |
| Bike Type | Pump Track / Fun / Dirt Bike |
| Wheel Size | 26 inches |
| Frame | NS Bikes 6061-T6 custom formed and butted aluminum |
| Frame Size | One Size |
| Fork | RST Dirt T |
| Fork Travel | 100 mm |
| Fork Axle | 9 mm |
| Steerer | 1 1/8 inch |
| Headset | GW integrated tapered IS42/IS52, sealed bearings |
| Stem | NS Drop 31.8, 50 mm, +10° |
| Handlebar | NS 31.8, 740 mm, 30 mm rise |
| Grips | NS Hold Fast Unlocked |
| Front Brake | Alhonga V-brake |
| Rear Brake | Tektro MD-M300 Aries, 160 mm |
| Brake Levers | Tektro |
| Front Rim | Jalco DBX 26", 32h |
| Rear Rim | NS Fundamental 26", 32h |
| Front Hub | NS 100 x 9 mm bolt-on |
| Rear Hub | NS 135 x 10 mm single-speed, 10T driver |
| Tires | Kenda Small Block 8, 26 x 2.1 |
| Crankset | Samox, 170 mm, 26T |
| Bottom Bracket | FSA square taper |
| Drivetrain | Single speed |
| Chain | PYC-510H, 1-speed |
| Pedals | NS Nylon |
| Recommended Fork Travel | 80–140 mm |
| Maximum Recommended Tire | 26 x 2.35 |
| Bottom Bracket Shell | Threaded 68 mm |
| Rear Hub Spacing | 135 x 10 mm |
| Disc Mount | IS mount |
| Maximum Rotor Size | Up to 185 mm |
| Seatpost Diameter | 30.9 mm |
| Seatpost Clamp | 34.9 mm |
| Approx. Frame Weight | 2.09 kg |
Specifications are based on NS Bikes' listed Zircus Blue configuration. NS Bikes notes that specifications, colors, and design may change without notice.
Geometry
| Geometry | Specification |
|---|---|
| Wheel Size | 26" |
| Fork Travel | 100 mm |
| Reach | 403 mm |
| Front Center | 648 mm |
| Standover | 743 mm |
| Stack | 560 mm |
| Effective Top Tube | 589 mm |
| Actual Top Tube | 564 mm |
| Seat Tube | 328 mm |
| Chainstay | 381 mm |
| BB Rise | -15 mm |
| Head Tube Angle | 70° |
| Effective Seat Tube Angle | 70° |
| Wheelbase | 1048 mm |
Recommended Uses
The NS Bikes Zircus Blue is particularly suitable for:
Pump-track riding
Dirt-jump practice
Learning manuals and bunny hops
Practicing 180s and other basic tricks
Urban recreational riding
Light off-road riding
Riders looking for a simple single-speed fun bike
Why Choose the NS Bikes Zircus Blue?
The NS Bikes Zircus Blue keeps the focus on bike handling. Its lightweight aluminum frame, 26-inch wheels, 100 mm fork, compact dirt geometry, and single-speed drivetrain create a straightforward platform for learning and refining riding skills.
Rather than adding unnecessary complexity, NS Bikes has equipped the Zircus with practical components that suit pump tracks, city riding, and casual dirt sessions. The optional derailleur hanger also gives owners the flexibility to move to a geared drivetrain later if their riding needs change.
