Skip to main content

Retrospec Harper Fixed-Gear/Single-Speed

Retrospec Harper Fixed-Gear/Single-Speed
  • Color: Sage Green
  • Color: Slate
  • Color: Atlantic Blue
  • Color: Matte Black
  • Color: Matte Graphite/Orange
  • Color: White/Black
Please select options


Our take on single-speed/fixed riding is your new go-to for commuting, coasting, and cruising far beyond point A to point B. With a quick flip of the back wheel, Harper turns from a single-speed cruise to a fixed-gear ride. Harper’s hand-built high-tensile strength steel diamond frame is designed for longevity. Ride comfortably with riser handlebars for improved posture. Powerful front and rear hand brakes come standard on our Harper and provide exceptionally controlled stops. Machined braking surfaces engineered onto the rims make for safer, faster, and more efficient stopping.

Flip-Flop Hub
- Harper is your two-for-one sidekick. With a quick flip of the back wheel, Harper turns from a single-speed cruise to a fixed-gear ride. Riding fixed has its advantages (including a guaranteed workout) but it’s not necessary to ride that way if you don’t enjoy it. Switch it up again with a quick flip of the rear wheel. Fixed-gear bikes famously have fewer moving parts so you can keep moving.

- We're not interested in anything but the best. Harper sports top-of-the-line components for smooth sailing and effortless riding. VP freestyle pedals, KMC chain, 25.4mm riser handlebars, and front and rear Promax brakes help you maintain total control of your ride. 30mm Deep V rims and thick, stable tires ensure a smooth ride, gripping to city streets regardless of conditions.


Frame Hand-built steel track frame
Headset 1 1/8” Threadless
Rims/Wheels 30mm Super Deep-V Double Wall w/ Braking Surface
Hubs Flip Flop
Tires Kenda City Tires 700 x 28c
Bottom Bracket NECO 68x110 Catridge Sealed
Chain KMC 1/8”
Cassette/Rear Cogs 16T Freewheel / 16T Fixed Cog
Handlebars 25.4mm Riser Handlebars
Tape/Grips Kraton Rubber Track Grips
Stem Alloy 25.4mm clamp size diameter
Brakes Promax
Pedals 9/16” Plastic Pedals
Saddle Critical Cycles Pista Saddle
Accessories & Extras All the tools you need to build and maintain your own bicycle including three metric Allen wrenches and a flat wrench

* Subject to change without notice.

Part Numbers

Option UPC MPN Store SKU
Sage Green / X-Small 815725029218 3263 RET34749325S
Sage Green / Small 815725029225 3264 RET33671760S
Sage Green / Medium 815725029232 3265 RET33732064M
Atlantic Blue / X-Small 815725029065 3248 HAR26357343S
Atlantic Blue / Small 815725029072 3249 HAR27275886S
Atlantic Blue / Medium 815725029089 3250 815725029089
Atlantic Blue / Large 815725029096 3251 RET36259822L
Matte Black / X-Small 815725029164 3258 RET35778624S
Matte Black / Medium 815725029188 3260 RET3094459M
Matte Graphite/Orange / X-Small 815725029119 3253 RET35297636S
Matte Graphite/Orange / Small 815725029126 3254 RET32867155S
Matte Graphite/Orange / Large 815725029140 3256 RET34989770L