low fixed gear HARPER SINGLE SPEED/FG
SKU: 79513067350
low fixed gear

low fixed gear HARPER SINGLE SPEED/FG

$18.10 $20.11
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 5 - Jul 10

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Description

low fixed gear HARPER SINGLE SPEED/FGThe 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. Retrospec's 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. Harpers hand built high

 

The 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.

Retrospec's 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.

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 700x28C
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 68x110 Catridge Sealed
Pedals: 9/16” Plastic Pedals
Saddle: Critical Cycles Pista Saddle
Tools: All the tools you need to build and maintain your own bicycle inclucding three metric Allen wrenches and a flat wrench.
Recommended Weight Limit: 250 LBS

SIZING

43CM - XS - 4'9"-5'3" (STANDOVER 30.5")

49CM - S - 5'3"-5'6" (STANDOVER 31")

53CM - M - 5'6"-5'9" (STANDOVER 32.5")

57CM - L - 5'10"- 6'1" (STANDOVER 34")

60CM - XL - 6'1+ (STANDOVER 35")

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 79513067350

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4.4 ★★★★★
Based on 379 reviews
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Product Reviews
C
Verified Purchase
CosmicAddiction
New York, US
★★★★★ 5
What a find!
Color: PDRN 25%
Good stuff! My skin healed ULTRA fast with this!! I can really tell it is good stuff! Plus, it has that “bio” smell that means it’s real. The formula is a little oily as opposed to watery. Just FYI I think serum slightly thicker is better.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
A
Verified Purchase
ADO
Chelsea, US
★★★★★ 5
Oopsy Daisy, bad for not reading directions!
Color: PDRN 25%
Oops 😬, I forgot to mix this PDRN serum with my hyaluronic serum before applying on my skin. Instead I have been applying it directly on my face 2x daily. I have noticed major improvement on my skin. My skin is dewy, bright, and flawless. Fortunately, I did not experience any skin reactions the undiluted product. I will come back and stock up on these bottles to mix with hyaluronic serum for microneedling.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 26, 2025
B
Verified Purchase
Boston
Phoenix, US
★★★★★ 4
The Skin Regenerator Your Routine Is Missing
Color: PDRN 25%
If you've been dealing with dull, dehydrated skin or feel like your usual creams just aren't cutting it anymore, the Salmon DNA PDRN 250,000 ppm Concentrate might be the missing piece. I started using this booster three months ago, and it has genuinely transformed the texture and bounce of my skin. What problem does this solve? As we age or expose our skin to environmental stress, our natural cell regeneration slows down, leading to dullness, loss of firmness, fine lines, and a damaged moisture barrier. This PDRN concentrate essentially acts as a cellular "wake-up call." Salmon DNA shares a remarkably high biocompatibility with human skin, helping to repair DNA damage, reignite collagen production, and speed up the skin's natural healing process. Features & Benefits · Regenerative Power: Packed with 25% (250,000 ppm) PDRN (Polydeoxyribonucleotide) to repair and rejuvenate. · Wrinkle & Texture Refinement: Helps improve elasticity and reduce fine lines for smoother, more resilient skin. · Hydration & Barrier Support: Formulated with Sodium DNA and Panthenol to deeply replenish moisture and soothe sensitivity. · Booster Format: A versatile concentrate you mix with your moisturizer or serum to amplify your entire routine. · Enhanced Complex: Includes EGF (Epidermal Growth Factor) and Peptides for added collagen support. Pros · ✅ High concentration of active ingredients for noticeable results. · ✅ Excellent for post-procedure skin (non-irritating after microneedling). · ✅ Improves overall skin health, not just surface appearance. · ✅ Suitable for all skin types looking for anti-aging or hydration. Cons · ❌ Texture can be sticky – it leaves a slight residue on your fingers and face that takes a few minutes to absorb. · ❌ Requires consistency – results are not instantaneous and need regular use to build. · ❌ The concept of "salmon DNA" might feel unusual to some, though it's highly effective and dermatologist-backed. Final Verdict This isn't a quick-fix product, but if you stick with it, the reward is skin that looks plumper, healthier, and more resilient. It’s like sending your skin into a repair shop. Best for anyone who has hit a plateau with their current anti-aging routine or who wants to actively strengthen their skin's foundation.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 21, 2026
A
Verified Purchase
angelique gorden
Carnegie, US
★★★★★ 5
Good
Color: PDRN 25%
Works well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 29, 2026
A
Verified Purchase
Alivia
Chelsea, US
★★★★★ 3
It's okay.
Color: PDRN 25%
I'm not going to say it's good I'm not going to say it's bad, I do not like the sticky feeling you have to wash your hands afterwards. And it feels sticky on your face for a while I used it about 10 minutes after microneedling my face. It did help my face feel better kind of calm it down a little bit. When I applied it it didn't burn or nothing
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026

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