Fun bike/ pump track

Zircus black

More info
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Bike info

- Tough and light alloy frame BASED ON DECADE
- “Pro dirt” geometry
- RST dirt t 100mm
- Tektro ARIES rear disc brake
- strong rear hub with 10t driver
- NS Bikes cockpit
- microdrive drivetrain with small chainring

The Zircus is the perfect tool for mastering pumptrack skills, learning bunnyhops, manuals, 180’s and other moves that are all in the ABC of mountain bike riding! The Zircus has the same lightweight and strong aluminum frame that is used in the Movement range and is built using affordable but high-quality parts making this bike perfect for playing in the city, off-road or on pump tracks. The bike has a compact drivetrain that saves weight and gives it that ‘pro’ look. An optional derailleur hanger is available so you can convert this bike from single speed to gears if needed.

Bike Specs

Main features

Frame Specs

Frame NS Bikes 6061-T6 custom formed and butted tubes


Forks RST Dirt T, 100mm travel, 9mm axle, 1&1/8” steerer tube

Headset GW integrated tapered IS42/IS52, sealed bearings

Stem NS Drop 31.8, 50mm, angle +10°

Handlebar NS 31.8, 740mm, 30mm rise

Grips NS Hold Fast Unlocked

Seatpost  Octane One fat seat-post combo

Saddle Octane One fat seat-post combo

Front brake Alhonga v-brake

Rear brake Tektro MD-M280 Aries 160mm

Levers Tektro

Rims Jalco DBX 26”, NS Fundamental 26”, 32h

Spokes Spokes w/14mm nipples

Front hub NS 100x9mm bolt-on

Rear hub NS 135x10mm single speed, 10T driver

Tires front / rear Kenda Small Block 8 26x2.1

Crankset Samox 170mm 26t

Bottom bracket FSA, square taper

Pedals NS Nylon

Chain PYC-510H, 1spd

Specifications subject to change without notice. Actual colours and design may vary slightly from the images on the website.

Tubes: A6061-T6 custom formed and butted tubes

Recommended fork travel: 80-140mm

Head tube: integrated tapered IS42/IS52

Head tube length: 115mm

Fits forks: fits forks with standard 11/8” or tapered 1.5 – 1 1/8” steerer tubes

BB shell: standard threaded 68mm (compatible with MTB cranks and 3pcs BMX cranks with Euro BB)

Biggest chainring: up to ~34t

Rear hub: spacing O.L.D 135x10mm, suggested bolton hubs

Disc brake: IS mount , max rotor size: up to 185mm

Maximum recommended tire size:  26”x2.35”

Seat post/clamp: 30.9mm / 34.9mm, max seat post insertion: 275mm

Rear derailleur: optional bolton hanger included

Weight: ~2.09kg


Tektro MD-M300 Ariesa rear disc brake


"Pro Dirt" geometry.


NS Bikes aftermarket components in unique finishes.


Wheel size 26"
Fork travel 100
Reach mm 403
in 15,9
FC mm 648
in 25,5
Standover mm 743
in 29,3
Stack mm 560
in 22,0
Effective TT mm 589
in 23,2
Actual TT mm 564
in 22,2
Seat tube mm 328
in 19,9
Chain stays mm 381
in 15,0
BB rise mm -15
in -0,6
Headtube angle 70,0
ST angle effective 70,0
Wheelbase mm 1048
in 40,5