Retrospec Harper

Fixed-Gear / Single-Speed Bike


Harper is sleek, stylish, smooth, and low-maintenance. A hand-built steel frame and flip-flop hub allow you to ride fixed-gear or free, making Harper the perfect whip to work, class, or brunch.

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Buy peace of mind: All of our bikes are built by professionals and come with a free 90-day tune-up!


Frame: Hand-built steel track frame

Geometry: Bar spin clearance & no toe overlap

Drop-Out: Horizontal drop-outs

Rims: 30mm Super Deep-V Double Wall Rims with Braking Surface

Hubs: Flip Flop Hub with Single-Speed 16T Freewheel & Fixed-Gear 16T Cog

Tires: Kenda City Tires 700×28C

Chain: KMC 1/8”

Headset: 1 1/8” Threaded

Stem: Promax Alloy 25.4mm clamp size diameter

Handlebars: 25.4mm Riser Handlebars

Grips: Kraton Rubber Track Grips

Brake: Front & Rear Promax Brakes with 22.2mm brake lever clamp diameter

Bottom Bracket: NECO 68×110 Catridge Sealed

Pedals: 9/16” Plastic Pedals

Saddle: Retrospec Pista Saddle