NS Bikes Zircus 26-Inch 2025 Bike

The Zircus is the perfect tool for mastering pump track skills: bunnyhops, manuals, 180s and all the other moves in the ABC of mountain biking.

It uses the same light, strong aluminium frame as NS's Movement range, built up with affordable but high-quality parts. Perfect for playing in the city, off-road or on pump tracks.

The compact single-speed drivetrain saves weight and gives it that pro look. An optional derailleur hanger lets you convert it to gears if needed.

Features

• Tough, light 6061-T6 aluminium frame
• "Pro Dirt" geometry
• RST Dirt T fork, 100mm travel
• Tektro V-brake front and Tektro MD-M300 Aries rear disc brake
• Brakes set up UK-style: front brake on the right lever, rear brake on the left
• Compact single-speed drivetrain
• Can be converted to gears with an optional hanger
• NS Bikes and Octane One components in unique finishes

Specification

Frame and fork

• Frame: NS Bikes 6061-T6 custom formed and butted tubes
• Size: one size
• Fork: RST Dirt T, 100mm travel, 9mm axle, 1 1/8" steerer

Drivetrain

• Crankset: Samox 170mm, 26 tooth chainring
• Bottom bracket: FSA, square taper
• Chain: PYC-510H, single speed

Brakes

• Front brake: Tektro V-brake
• Rear brake: Tektro MD-M300 Aries, 160mm rotor
• Brake levers: Tektro, UK setup (right lever front, left lever rear)

Wheels

• Rims: Jalco DBX 26" / NS Fundamental 26", 32h
• Spokes: 14mm nipples
• Front hub: NS 100 x 9mm bolt-on
• Rear hub: NS 135 x 10mm single speed, 10T driver
• Tyres: Kenda Small Block 8, 26 x 2.1"

Cockpit

• Headset: GW integrated tapered IS42 / IS52, sealed bearings
• Handlebar: NS 31.8mm, 740mm wide, 30mm rise
• Stem: NS Drop 31.8, 50mm, +10°
• Grips: NS Hold Fast Unlocked

Seat and pedals

• Seatpost and saddle: Octane One fat seatpost combo
• Pedals: NS nylon