Name: Harper Fixie Bike - Step Through Single Speed
Brand: Retrospec
Price: 299.99 USD
Availability: OutOfStock
Rating: 4.7 (986 reviews)

Features

Close-up of a blue bicycle's seat and handlebar with brown grips on a white background.

Durable, Comfortable Frame

Harper’s accessible step through frame design promotes a more upright, comfortable riding position. Its sturdy steel build makes it tough, resistant to fatigue, and shock-absorbent – a must for city riding.

Close-up of a blue bicycle's rear wheel, chain, and crankset with the name "Harper" on the frame.

Lightweight & Low Maintenance

A single speed drivetrain helps keep this bike lighter, less complicated, and simpler to maintain.

Close-up of a blue bicycle's head tube and handlebar, with visible brake cable and saddle.

Protection From the Elements

Internal cable routing offers a sleek look and helps protect your cables from weather and debris.

Close-up of a blue bicycle's front wheel, tire, spokes, and brake against a white background.

Solid Traction, Rain or Shine

Grooved commuter tires grip the pavement and dispel water.

A close-up of a blue bicycle's rear wheel, chain, and pedal system.

Fixed Gear or Freewheel

A rear flip-flop hub allows you to ride freewheel or switch to fixed gear by flipping the rear wheel.

Close-up of a blue bicycle's handlebar with a black brake lever and brown grips.

Secure, Comfortable Grip

Textured grips provide a secure, shock-absorbing grip for better control.

Durable, Comfortable Frame

Harper’s accessible step through frame design promotes a more upright, comfortable riding position. Its sturdy steel build makes it tough, resistant to fatigue, and shock-absorbent – a must for city riding.
Lightweight & Low Maintenance

A single speed drivetrain helps keep this bike lighter, less complicated, and simpler to maintain.
Protection From the Elements

Internal cable routing offers a sleek look and helps protect your cables from weather and debris.
Solid Traction, Rain or Shine

Grooved commuter tires grip the pavement and dispel water.
Fixed Gear or Freewheel

A rear flip-flop hub allows you to ride freewheel or switch to fixed gear by flipping the rear wheel.
Secure, Comfortable Grip

Textured grips provide a secure, shock-absorbing grip for better control.

All Natural Fun From the Field

Best for pavement

A pink single-speed bicycle with black tires and saddle.

Pavement

Gravel

All terrain

Best for flat

Flat

Some hills

Hilly

Mountain

⚠️ WARNING! This product can expose you to chemicals including Carbon-Black Extracts, which is known to the state of California to cause cancer and birth defects or other reproductive harm. For more information go to https://www.p65warnings.ca.gov/

We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. Bike and frame weights are based off pre-production painted frames at time of publication. Weights may vary in final production.

Specifications
Sizing
Financing
Assembly & Owner's Manual

Specifications

Frameset

Frame Hand Built high-tensille Steel, top tube internal cable routing, "UrbanComfort" design, forged horizontal rear dropouts with integrated chain tensioners. Bar-spin clearance with no toe overlap. TT: 28mmOD, DT:46mmODprofile (ovalized). Internal cable routing, 2 sets bottle braze-ons, rear rack braze-ons.
Fork Unicrown, Threaded, 28.6mm, 2x fender-eyelet, rack braze-ons

Wheelset

Rims retrospec aluminum double-wall 32H, precision machined brake tracks
Hubs retrospec low-flange aluminum alloy, loose-ball bearings, 32H, rear flip-flop, bolt-on: 16T FW/16T Fixed cog.
Spokes 14G UCP
Tires retrospec 700 x 32C all-season, S/V valves

Recommended Weight Limit 250 LBS

Drivetrain

Crank Harper Forged Aluminum Alloy 170mm x 46T x1/8"
Chain KMC Z-series 1/8
Chain Ring(s) 44T steel
BB Sealed Cartridge
Freewheel/Cog 16T x 1/8" FW + 16T Fixed Cog

Components

Headset 1 1/8" (28.6mm) steel, Threaded, Semi-Integrated
Brakes Aluminum alloy dual-pivot side-pull calipers & aluminum brake levers. 47-57mm reach.
Handlebars Aluminum Alloy 620mm Wide x 35mm Rise, 25.4
Grips retrospec UrbanComfort Kraton 125mm length
Stem Quill-type aluminum 80mm extension, -17⁰ rise, 25.4 handlebar clamp, 22.2 quill
Saddle retrospec Sport Comfort (SO/ST anatomically specific)
Seatpost Aluminum Alloy 25.4 x 300mm with Micro Adjust head
Seatpost Clamp Aluminum alloy 28.6mm
Pedals Low-Profile Platform, Reinforced Nylon resin, 9/16"

Sizing

How to measure my inseam for a bike

Your inseam can help you find the perfect sized bike (measuring it properly is similar to pant inseams but measured a little differently). Here's how they work:

Stand upright with your feet 6-8" apart.
Using a tape measure or tailor tape, measure from the bottom of your foot to the top of the inside of your leg.
Compare your inseam measurement to the standover height of the bike. You should have about an inch of space between your body and the top tube.

ARider Height

BInseam

CTop Tube

Size	Height Range	Standover Height
42CM - 42cm	5'4" - 6'4"	31"

Financing

Buy Now, Pay Later

Make easy monthly payments over 3,6 or 12 months

$102.56

PER MONTH

3 MONTHS

APR 15.34%

Interest $7.69

Total $307.68

$52.26

PER MONTH

6 MONTHS

APR 15.32%

Interest $13.57

Total $313.56

$27.12

PER MONTH

12 MONTHS

APR 15.28%

Interest $25.45

Total $325.44

Get a real-time decision with just 5 pieces of info.

Assembly & Owner's Manual

Assembly Instructions

Owner's Manual

4.7

Rated 4.7 out of 5 stars

Based on 986 reviews

Total 5 star reviews: 775 Total 4 star reviews: 168 Total 3 star reviews: 42 Total 2 star reviews: 1 Total 1 star reviews: 0

986 reviews

Sort

Cory C.
Verified Buyer
5/1/25
Rated 5 out of 5 stars
Harper Fixie
Great bike. Easy to assemble and rides wonderful.
Was this helpful?
Michael J.
Verified Buyer
4/21/25
Rated 5 out of 5 stars
Love it
Even retrospec will tell you this isn’t a high end road bike, but this was the exact bike I needed for this time in my life: something simple to ride and maintain that will get me around town. I was very pleased with the instructions, assembly, and build quality. I’d absolutely recommend.
Was this helpful?
Andrei K.
Verified Buyer
4/21/25
Rated 5 out of 5 stars
Great simple bike
Absolutely love it! Simple, lightweight, and fun to ride.
Was this helpful?
james b.
Verified Buyer
4/8/25
Rated 5 out of 5 stars
Good for around town
Got it to stay in shape after getting back from a county where I walked and biked a lot. Great fit. Very easy to assemble
Was this helpful?
Kenneth S.
Verified Buyer
4/8/25
Rated 4 out of 5 stars
Harper bike
Sharp looking bike and easy to assemble. Just wish it came with a kick stand
Was this helpful?

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