Name: Harper Coaster Bike - Single Speed
Brand: Retrospec
Availability: InStock
Rating: 4.7 (306 reviews)

Features

Durable Steel Frame

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

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.

Coaster Brake

To stop and take in the views, simply pedal backwards.

Durable Steel Frame

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

To stop and take in the views, simply pedal backwards.

All Natural Fun From the Field

Best for pavement

Pavement

Gravel

All terrain

Best for flat

Flat

Some hills

Hilly

Mountain

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

"No fuss. No rush. Nothing you don't need. Come for the bike, stay for the lifestyle"

⚠️ 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

Specification

Frameset

Frame Hand Built tig-welded high-tensile steel, "UrbanComfort" design
Fork Unicrown, Threaded, 28.6mm, 1x fender-eyelet

Wheelset

Rims Retrospec aluminum double-wall 32H, 30mm V-section, precision machined brake tracks
Spokes 14G UCP
Tires Retrospec 700 x 28C all-season, P/V valves

Recommended Weight Limit 250 LBS

Drivetrain

Chain KMC 1/8”
Bottom Bracket 68x110 Cartridge Sealed

Components

Headset 1 1/8" (28.6mm) steel, Threaded
Brakes Rear Coaster Brake
Handlebars Aluminum Alloy 520mm Wide x 30mm Rise, 25.4
Grips Retrospec Triangle Kraton 125mm length
Stem Quill-type aluminum 80mm extension, -17⁰ rise, 25.4 handlebar clamp, 22.2 quill
Saddle Retrospec Pista
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	5’5” - 5’7”	29.5"
49CM - S	5’8” - 5’10”	31"
53CM - M	5’11” - 6’0"	32.25"
57CM - L	6’1” - 6’2”	33.375"
60CM - XL	6’3” - 6’5"	35"

Financing

Buy Now, Pay Later

Make easy monthly payments over 3,6 or 12 months

$89.60

PER MONTH

3 months

APR 20.22%

Interest $8.81

Total $268.80

$89.60

PER MONTH

3 months

APR 20.22%

Interest $8.81

Total $268.80

$89.60

PER MONTH

3 months

APR 20.22%

Interest $8.81

Total $268.80

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 306 reviews

Total 5 star reviews: 234 Total 4 star reviews: 58 Total 3 star reviews: 14 Total 2 star reviews: 0 Total 1 star reviews: 0

306 reviews

Sort

Eric S.
Verified Buyer
11/25/24
Rated 5 out of 5 stars
Feels good to be back home
The Harper Coaster bike is like the first bike I ever owned yet better.
Simple yet beautiful design/color. Built strong and remarkably light.
I previously owned an electric bike but the bike was too heavy and it's disc brakes failed repeatedly. I would highly recommend this bike to anyone looking to keep it simple.
Plus I have found that pedaling is better than not pedaling.
Was this helpful?
Zach
Verified Reviewer
11/24/24
Rated 5 out of 5 stars
My favorite bike
This is my favorite bike. I want to buy another, but medium size is no longer in stock. Can’t wait until you get more of these.
Was this helpful?
Parker Q.
Verified Buyer
11/11/24
Rated 5 out of 5 stars
Very nice Ride
I needed a simple bike for a tweed ride they hold in philadelphia and this one is great for that. Simple bike that's Easily customizable and fit the theme of the ride.
Was this helpful?
Robin S.
Verified Buyer
10/7/24
Rated 5 out of 5 stars
Harper Single Speed
Great bike!!
Was this helpful?
Russell J.
Verified Buyer
9/8/24
Rated 4 out of 5 stars
Pleasantly pleased
Besides getting used to the coaster brake, I love it! I did make some changes to add a personal touch.
Was this helpful?

Reviews LoadedReviews Added

Back to Single Speed & Fixie Bikes

Previous Search

Popular Searches

Categories & Collections

Harper Coaster Bike - Single Speed

Harper Coaster Bike - Single Speed

Limited Lifetime Warranty

Free Shipping

50-Day Returns

Get to know your ride

Features

Durable Steel Frame

Single Speed

Commuter Tires

Coaster Brake

Durable Steel Frame

Single Speed

Commuter Tires

Coaster Brake

All Natural Fun From the Field

Best for pavement

Best for flat

Specification

Sizing

How to measure my inseam for a bike

Buy Now, Pay Later

Please enter an amount larger than or equal to $100.

Assembly Instructions