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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
Sage Green / Small 815725029225 3264
Sage Green / Medium 815725029232 3265
Sage Green / Large 815725029249 3266
Sage Green / X-Large 815725029256 3267
Slate / X-Small 815725029263 3268
Slate / Small 815725029270 3269
Slate / Medium 815725029287 3270
Slate / Large 815725029294 3271
Slate / X-Large 815725029300 3272
Atlantic Blue / X-Small 815725029065 3248
Atlantic Blue / Small 815725029072 3249
Atlantic Blue / X-Large 815725029102 3252
Matte Black / X-Small 815725029164 3258
Matte Black / Small 815725029171 3259
Matte Black / Medium 815725029188 3260
Matte Black / Large 815725029195 3261
Matte Black / X-Large 815725029201 3262
Matte Graphite/Orange / X-Small 815725029119 3253
Matte Graphite/Orange / Medium 815725029133 3255 210000030917
Matte Graphite/Orange / Large 815725029140 3256
Matte Graphite/Orange / X-Large 815725029157 3257
White/Black / X-Small 815725029317 3273
White/Black / Small 815725029324 3274
White/Black / Medium 815725029331 3275
White/Black / Large 815725029348 3276
White/Black / X-Large 815725029355 3277