Skip to main content

Retrospec Harper Coaster Single Speed

Retrospec Harper Coaster Single Speed
  • Color: Matte Black
  • Color: Olive Drab
Color: Olive Drab
Size: Medium
Please select options Unavailable


Meet your lightweight, low-maintenance throwback bike, reminiscent of days spent cruising the cul-de-sac. Harper Coaster kicks it old-school with a built-in coaster brake and a simple single-speed drivetrain.


- 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 backward.

SizeRider HeightStandover Height
43cm - X-Small5’5” - 5’7” 29.5"
49cm - Small5’8” - 5’10” 31"
53cm - Medium5’11” - 6’0" 32.25"
57cm - Large6’1” - 6’2” 33.375"
60cm - X-Large6’3” - 6’5" 35"


Frame Hand Built tig-welded high-tensile steel, "UrbanComfort" design
Fork Unicrown, Threaded, 28.6mm, 1x fender-eyelet
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
Bottom Bracket 68x110 Cartridge Sealed
Chain KMC 1/8”
Brakes Rear Coaster Brake
Handlebars Aluminum Alloy 520mm Wide x 30mm Rise, 25.4
Tape/Grips Retrospec Triangle Kraton 125mm length
Stem Quill-type aluminum 80mm extension, -17° rise, 25.4 handlebar clamp, 22.2 quill
Headset 1 1/8" (28.6mm) steel, Threaded
Seatpost Aluminum Alloy Seat Post 25.4 x 300mm with Micro Adjust head
Saddle Retrospec Pista
Pedals Low-Profile Platform, Reinforced Nylon resin, 9/16"

* Subject to change without notice.

Part Numbers

Option UPC MPN Store SKU
Olive Drab / Medium 810015708507 4196 210000018120