Skip to main content


Retrospec Harper Plus Single Speed

Retrospec Harper Plus Single Speed
  • Color: Coastal Blue
  • Color: Matte Black
  • Color: Olive
  • Color: Matte Tungsten
Please select options
Shipping is not available for this item. Select in-store pick up at one of our convenient 3 Chicago locations or choose local delivery. Enjoy our 30 Day Best Price Guarantee, ensuring you the lowest price


There's no other feeling like riding fixed gear. You're bound to the wheel, connected to the bike, and rewarded with instant response to your pedal input. If freewheel is more your speed, switch to single-speed bike with a flip of the rear hub. Pro-tip: think of fixed gear as your adrenaline-packed ride and single speed its relaxed counterpart. Both are simple but provide different pedal stroke sensations.

Harper Plus is equipped with sealed cartridge bearings that protect delicate bike parts from gunk in the road, require less maintenance than loose bearings, and increase the longevity of your ride. Its threadless steering system lightens your load, gives less flex and more precision, and is much easier to maintain or adjust as needed.


Frame Hand Built tig-welded high-tensile steel, "UrbanComfort" design, forged horizontal rear dropouts with integrated chain tensioners, bar-spin clearance with no toe overlap
Fork Unicrown, Threadless, 28.6mm, 1x fender-eyelet
Headset 1 1/8" (28.6mm) steel, Threadless
Rims/Wheels Retrospec aluminum double-wall 32H, 40mm deep-V section, precision machined brake tracks
Hubs Retrospec large-flange aluminum alloy, sealed cartridge bearings, 32H, rear flip-flop, bolt-on
Spokes 14G Stainless steel
Tires Retrospec 700 x 32C all-season, P/V valves
Crankset Mantra Forged Aluminum Alloy 170mm x 46T x1/8"
Chain KMC 1/2 x 1/8"
Handlebars Aluminum Alloy 520mm Wide x 30mm Rise, 25.4
Tape/Grips Retrospec UrbanComfort Kraton 125mm length
Stem Aluminum alloy 4-bolt Threadless, 80mm extension x 7° rise x 36mm rise, 25.4 handlebar clamp, 28.6 steerer
Brake Levers Aluminum
Brakes Aluminum alloy dual-pivot side-pull calipers
Pedals Low-Profile Platform, Reinforced Nylon resin, 9/16"
Saddle Retrospec Urban2
Seat Post Aluminum Alloy Seat Post 25.4 x 300mm with Micro Adjust head
Seat Binder Aluminum alloy CNC precision 28.6mm

* Subject to change without notice.

Part Numbers

Option MPN Store SKU
Coastal Blue / 43cm RET4396 5029
Coastal Blue / 49cm RET4397 5030
Coastal Blue / 53cm RET4398 5031
Coastal Blue / 57cm RET4399 5032
Coastal Blue / 61cm RET4400 5033
Matte Black / 43cm RET4401 5034
Matte Black / 49cm RET4402 5035
Matte Black / 53cm RET4403 5036
Matte Black / 57cm RET4404 5037
Matte Black / 61cm RET4405 5038
Olive / 43cm RET4406 5076
Olive / 49cm RET4407 5077
Olive / 53cm RET4408 5078
Olive / 57cm RET4409 5079
Olive / 61cm RET4410 5080
Matte Tungsten / 43cm RET4411 5081
Matte Tungsten / 49cm RET4412 5082
Matte Tungsten / 53cm RET4413 5083
Matte Tungsten / 57cm RET4414 5084
Matte Tungsten / 61cm RET4415 5085