Critical Cycles Harper Single-Speed Fixed Gear Urban Commuter Bike Review

Critical Cycles Harper Single Speed Fixed Gear Bike Review

Critical Cycles Harper Single Speed Fixed Gear Bike Review

Do you live in the city? Are you interested in taking up bike riding? Well, you are in luck as Harper has just what you need, the Critical Cycles Harper Single-Speed Fixed Gear Urban Commuter Bike. This one of the next generation commuter bikes you can use in single or fixed speed. Throughout our review, we refer to a single speed bike or the Fixie as it has a flip-flop back hub on the back wheel. This allows you change with ease from a fixed gear to a single speed. Now that we have tickled your mind, let us find out if this bike is the one you would like to own.

Review of the Critical Cycles Harper Commuter Bike

One thing about the Critical Cycles Harper Fixie Bike is it will keep you on the road after your friends have given up. The Critical Cycle brands are known throughout the bikers’ community and renowned for making affordable cycles. They use quality parts with a top of the line performance.


Primarily, you receive the option of choosing your color from ten different shade designs. The bicycles available in different sizes ranging:

  • From X-Small measuring 16.93-inches
  • Small measuring 19.23-inches
  • Medium measures 20.87-inches
  • Large measuring 22.44-inches and
  • X-Large measuring 24-02-inches

The bikes equipped with top of the line parts and made with a spin-able frame. With the structure, you can easily maneuver the bicycle down curves. The chain wheel is durable and made with alloy. Further, the frame has a hand-built high-tensile steel construction and Tungsten Insert Gas welded. In addition, with the steel design, it is a bit of a leg trainer when cycling up hills.

The frame has a bar-spin clearance with no toe overlaps and has horizontal dropouts. Further, the pedals are 9/16” plastic and we recommend you upgrade them with cage pedals for using it in single speed or fixed gear. This is a city bike and with the flip-flop center, you can free wheel it whenever you like. Therefore, if you do not want to pedal let it go and enjoy the ride downhill.

How does it work all you need to do is take out the back wheel, flip the wheel around and mount it again. With the built-in fixed cog, the bike correlates your pedaling. All that happens is the back wheel relies on the motion of your feet and the faster you go the bike moves with you.

The handlebars are a riser model with a BMX handlebar design to give you an upright yet relaxed riding position and great for the back. While the Pista saddles comfortable to sit on. On the handlebar, you have Kraton Rubber Track Grips. If you are concerned about the bike handling your weight, it can carry up to 220lbs.

Tread and Safety

The Harper Fixie Bike comes standard with 30mm deep-v double walled rims with a braking surface. With the deep and robust design of the rims, they give the bike great anchoring place and give it a visual value. The spokes made from alloy and helps prevent corrosion forming making them give balance to the wheels and durable. The Wanda 700x23c tires give you enough traction when cycling around town. Moreover, the KMC chain and the front and rear Promax brakes are perfect to use when needed. The bottom bracket is a NECO 68×110 cartridges sealed. With the two available brakes, you have flawless stopping power.

Main Features

  • The frame is hand-built and constructed with steel
  • The bike has no toe overlap and has a bar spin
  • You get front and rear brakes while the rims are Deep-V double walled
  • The Harper Urban Commuter Bikes equipped with Wanda City Tires, KMC Chain, Riser Handlebars, and has the flip-flop hub
  • The frame comes with a lifetime warranty and the parts only for 30-days plus you get a 50-day return policy – however if you do replace the original parts the warranty becomes void
  • Includes all the tools you need to assemble the bike


BRAKES Front and Rear Coaster
BRACKET Bottom NECO 68×110 Cartridge Sealed
CHAIN KMC ⅛-inch
EXTRAS Has Bar Spin Clearance and Includes all the Tools for Assembly
FORK High-tensile Steel Track TIG-welded
FRAME High-tensile Steel Track TIG-welded
GRIPS Kraton Rubber Track
HANDLEBAR Riser 25.4mm
HEADSET Threaded 1 ⅛-inch
HUBS Single-Speed 16 T Freewheel Flip-Flop with a 16T Fixed-Gear Cog
RIMS Super Deep-V Double Wall 30mm with Braking Surface
PEDALS Plastic 9/16-inch with no toe overlap
SADDLE Critical Cycles Pista
STEM Promax Alloy with a 25.4 clamp size diameter
TIRES Wanda 700x23c City

Quick Assembly out of the Box

Critical Cycles have made it easier for you to assemble the Harper Single-Speed Fixed Gear Urban Commuter Bike. You receive the single speed road bike to some extent assembled. Included you receive three Allen wrenches and a flat wrench. The rear wheel, chain, cog, and drivetrain you receive ready to go. In addition, the headset for and stems assembled.

Pros and Cons Associated with the Harper Single-Speed Bike


  • The rims are well built
  • Has double brakes
  • Enough gear to support different terrain rides
  • Affordable
  • Easy to assemble
  • Comfortable to ride


  • Has a heavy frame
  • The plastic parts are delicate

In Closing


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