Name: Harper Plus Fixie Bike - Single Speed
Brand: Retrospec
Price: 249.99 USD
Availability: InStock
Rating: 4.7 (980 reviews)

Features

Aero-style Downtube Frame

High-tensile strength steel is tough, resistant to fatigue, and shock-absorbing－a must for city riding.

Sealed Cartridge Bearing Hubs

Protect delicate bike parts from gunk in the road.

Internal Cable Routing

Runs through the frame for a sleek look and protection from the elements.

40mm Rims

Strong double-wall, 40mm rims with stainless steel spokes make for a stiffer, more stable wheel and aero-profile.

Threadless Steering System

Stronger, lighter, more precise steering, and easier to maintain.

Integrated Chain Tensioners

Precisely positions & center the rear wheel in a centered position with correct chain tension minimizing future upkeep and tuning up.

Single Speed

Single speed bikes boast fewer components than multi-gear bikes, which keeps them lighter, less complicated, and easier to maintain.

Commuter Tires

Grooved tires grip the pavement and dispel water for solid traction, rain or shine.

Flip Flop Hub

Ride freewheel or switch to fixed gear by flipping the rear wheel.

Aero-style Downtube Frame

High-tensile strength steel is tough, resistant to fatigue, and shock-absorbing－a must for city riding.
Sealed Cartridge Bearing Hubs

Protect delicate bike parts from gunk in the road.
Internal Cable Routing

Runs through the frame for a sleek look and protection from the elements.
40mm Rims

Strong double-wall, 40mm rims with stainless steel spokes make for a stiffer, more stable wheel and aero-profile.
Threadless Steering System

Stronger, lighter, more precise steering, and easier to maintain.
Integrated Chain Tensioners

Precisely positions & center the rear wheel in a centered position with correct chain tension minimizing future upkeep and tuning up.
Single Speed

Single speed bikes boast fewer components than multi-gear bikes, which keeps them lighter, less complicated, and easier to maintain.
Commuter Tires

Grooved tires grip the pavement and dispel water for solid traction, rain or shine.
Flip Flop Hub

Ride freewheel or switch to fixed gear by flipping the rear wheel.

Best for pavement

Pavement

Gravel

All terrain

Best for flat

Flat

Some hills

Hilly

Mountain

"Retrospec makes some of the best affordable recreational bikes."

⚠️ 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

Sizes 43, 49, 53, 57, 61cm
Hand Built tig-welded high-tensile steel, top tube internal cable routing, "UrbanComfort" design, forged horizontal rear dropouts with integrated chain tensioners. Bar-spin clearance with no toe overlap.
Fork Unicrown, Threadless, 28.6mm, 1x fender-eyelet

Wheelset

Rims Retrospec aluminum double-wall 32H, 40mm deep-V-section, precision machined brake tracks
Hubs Retrospec large-flange aluminum alloy, sealed cartridge bearings, 32H, rear flip-flop, bolt-on: 16T FW/17T Fixed cog.
Spokes 14G Stainless steel
Tires Retrospec 700 x 32C all-season, P/V valves

Recommended Weight Limit 250 LBS

Drivetrain

Crank Harper Forged Aluminum Alloy 170mm x 46T x1/8"
Chain KMC C1 1/2 x 1/8"
BB Sealed Cartridge, 68 x 110.5mm
Freewheel/Cog 16T x 1/8"

Components

Headset 1 1/8" (28.6mm) steel, Threadless
Brakes Aluminum alloy dual-pivot side-pull calipers & aluminum brake levers. 47-57mm reach.
Handlebars Aluminum Alloy 520mm Wide x 30mm Rise, 25.4
Grips Retrospec UrbanComfort Kraton 125mm length
Stem Aluminum alloy 4-bolt Threadless, 80mm extension x 7⁰ rise x 36mm rise, 25.4 handlebar clamp, 28.6 steerer
Saddle Retrospec Urban2
Seatpost Aluminum Alloy Seat Post 25.4 x 300mm with Micro Adjust head
Seatpost Clamp Aluminum alloy CNC precision 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
43CM - XS: 43cm	5’5” - 5’7”	29.5"
49CM - S: 49cm	5’8” - 5’10”	31"
53CM - M: 53cm	5’11” - 6’0"	32.25"
57CM - L: 57cm	6’1” - 6’2”	33.375"
61CM - XL: 61cm	6’3” - 6’5"	35"

Financing

Buy Now, Pay Later

Make easy monthly payments over 3,6 or 12 months

$85.47

PER MONTH

3 MONTHS

APR 15.34%

Interest $6.42

Total $256.41

$43.55

PER MONTH

6 MONTHS

APR 15.30%

Interest $11.31

Total $261.30

$22.60

PER MONTH

12 MONTHS

APR 15.28%

Interest $21.21

Total $271.20

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 980 reviews

Total 5 star reviews: 770 Total 4 star reviews: 167 Total 3 star reviews: 42 Total 2 star reviews: 1 Total 1 star reviews: 0

980 reviews

Sort

Meagan R.
Verified Buyer
3/17/25
Rated 5 out of 5 stars
Perfect first bike!
Perfect size, weight and I love the retro style. I’m so happy with it ☺️
Was this helpful?
Gary R.
Verified Buyer
3/15/25
Rated 5 out of 5 stars
Great simple smooth ridding bike
I wanted a bike like this a long time. I love the nice clean lines of this bike without all the cables and levers. Not alot of on going adjusting and the sound of rubbing break pads. I thought I'd have to build my self till I found this one. Asimley was easy much was already done. Thanks to all!
Was this helpful?
Matthew D.
Verified Buyer
3/13/25
Rated 5 out of 5 stars
Sweet Fixed Gear / Single Speed for the money
Stylish and easy to work on bike . Well worth the money !
Was this helpful?
Edward
Verified Reviewer
3/13/25
Rated 5 out of 5 stars
I have had mine since 2019
Although I had my doubts. It is very beautiful. I had an issue with the chain coming off but I was able to fix this using the smart brackets on the back bolts that help you adjust acuratley. Thanks.
Was this helpful?
Chris R.
Verified Buyer
2/1/25
Rated 4 out of 5 stars
Great for Commuting!
I recently purchased the Harper Fixie bike for commuting, and so far, I’m really happy with it! The build quality is excellent, and the lightweight frame makes it easy to handle and maneuver through city streets. The ride is very smooth, and the bike responds well, making it a great choice for daily use.
One thing to note is that since there’s no suspension, you do feel every bump in the road. It’s not a dealbreaker, but something to keep in mind if you’re riding on rougher surfaces. That said, for the price, this bike is a fantastic value!
I’ve made a few upgrades to suit my commuting needs, including a kickstand, U-lock holder, bottle holder, travel pouch, and side mirror. These small additions have made my rides even more convenient.
Overall, I have no complaints—I’m completely satisfied with this purchase and would recommend it to anyone looking for a reliable commuter bike!
Was this helpful?

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