QR-1 seatpost clamps are cold forged and CNC machined from 6061-T6 aluminum alloy. The QR-1, as the name implies, has a quick release lever, making seat height adjustments a snap. Weighing just 30 grams/1.1 ounces in the 31.8 size, it’s as lightweight as it is tough.The head of the lever and the face of the clamp are given a proprietary low-friction surface treatment that ensures smooth lever action for the life of the clamp without the need for a bushing. Laser-etched graphics and stainless steel hardware. Item Specifications: Material, Aluminum, Type, Quick Release, Color, Red, Diameter, 34.9, Defined Color, Red,

Promax QR-1 34.9mm Aluminum Quick Release Seatpost Clamp - Lightweight, CNC Machined, Red

Reference Number: 3DX6EN

Upgrade your bike's performance and style with the Promax QR-1 Seatpost Clamp - the perfect blend of lightweight engineering and durable construction for serious cyclists. Designed with precision and crafted from high-quality 6061-T6 aluminum alloy, this 34.9mm quick-release seatpost clamp ensures reliable performance and effortless adjustments on every ride.

Materials & Construction:

Made from aircraft-grade 6061-T6 aluminum alloy, the QR-1 seatpost clamp offers exceptional strength-to-weight ratio, providing durability without adding unnecessary weight. Its cold-forged and CNC-machined construction guarantees precise fitment and longevity, making it ideal for demanding cycling conditions.

Performance & Engineering:

Featuring a smooth, proprietary low-friction surface treatment on the clamp face and lever head, the QR-1 ensures effortless operation over countless rides without the need for bushings. Weighing just 30 grams (1.1 ounces) in the 34.9mm size, it maintains a lightweight profile conducive to riding efficiency and agility.

Components & Technology:

The quick-release lever allows for rapid seat height adjustments, making on-the-fly changes quick and secure. Laser-etched graphics enhance visibility and style, while stainless steel hardware provides corrosion resistance and sustained performance. The proprietary surface treatment guarantees a lifetime of smooth, reliable lever action.

Style & Use Case:

Available in a striking red finish, the QR-1 seatpost clamp adds a flash of color to your bike while offering maximum functionality. Its sleek design is perfect for road, mountain, or gravel bikes that demand quick, secure adjustments and a bold aesthetic. Whether you're tuning your saddle height for the perfect fit or making quick stops, this clamp offers convenience without sacrificing style.

Innovative Features:

- Proprietary low-friction surface treatment for smooth lever action

- CNC-machined from durable 6061-T6 aluminum alloy

- Laser-etched graphics for enhanced style and visibility

- Easy-to-use quick-release mechanism for instant adjustments

- Corrosion-resistant stainless steel hardware for longevity

Optimize your bike setup with the Promax QR-1 Seatpost Clamp - the ultimate combination of lightweight engineering, durability, and style for serious cyclists. Perfect for upgrading existing components or building a custom ride that demands precision and performance.

  • Lightweight and durable, the Promax QR-1 Seatpost Clamp is crafted from high-quality 6061-T6 aluminum alloy, offering exceptional strength while maintaining a minimal weight of just 30 grams for 34.9mm size.
  • Features a proprietary low-friction surface treatment on the lever and clamp face, ensuring seamless, long-lasting quick-release operation without the need for additional bushings or lubrication.
  • Engineered with precision CNC machining and cold forging processes, this clamp delivers superior fit, finish, and consistent performance for secure seatpost retention on every ride.
  • Stylish and highly functional, the QR-1 boasts laser-etched graphics and stainless steel hardware, combining aesthetic appeal with corrosion resistance for durability in all weather conditions.
  • Ideal for road and mountain biking, this quick-release seatpost clamp allows for effortless saddle height adjustments on the trail or during race day, making it a versatile upgrade for performance-focused cyclists.
Item Specifications
MaterialAluminum
TypeQuick Release
ColorRed
Diameter34.9
Defined ColorRed

Why 365 Cycles?

365 Cycles is an Authorized Promax Dealer, and we offer the Full Promax Warranty!

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Shipping & Handling

Most orders placed during the workweek before 1:30 pm EST ship the same day, but in rare cases (peak season/holiday periods) handling time can take up to 48 hours. If you have questions regarding shipping estimates, please let us know prior to placing your order. There is a direct signature requirement for all orders over $500.

Please allow 1-2 business days for your order tracking to update.

  • Cut off for SAME DAY SHIPPING- 1:30 pm EST Monday - Friday
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Combined Shipping Discounts

To offer customers savings on shipping, we offer discounts when shipping multiple items from our store. We cannot issue refunds on shipping once an order is finalized so please follow the 5 steps below and ask if you are having trouble with the discount before you make a purchase.

  1. Be sure you are using the US site: https://www.ebay.com
  2. Select Add to Cart (instead of Buy It Now) with items from our store 365Cycles
  3. Click on Proceed to Checkout. On the checkout page, the shipping service on each line item needs to match
  4. Compare First Class vs Priority as sometimes Priority can be cheaper and it gets to you faster!
  5. You’ll need to change the shipping method to Priority on every item in your cart before the rate can be calculated.

Returns

365 Cycles offers returns for 30 days on new items in their original, intact packaging. Return shipping for ALL orders are to be paid by the buyer. Please be sure to read our return policy entirely and if you have any questions, please contact Customer Service.

Full refunds are issued on items that are brand new and we are able to resell as new. 365 Cycles reserves the right to deny returns that are outside of policy including, but not limited to, used items, items missing original packaging, items with damaged manufacturer packaging, or international orders. Return orders must be shipped in a box or bubble mailer. Items shipped without an outer box will incur a restocking fee. You will be contacted through eBay if your return is ineligible for a full refund.

Returns must be initiated within 30 days from purchase date through your Purchase History under My eBay.

If we make an error in shipping, please contact us -- we will ship out the correct item and provide a free prepaid return label as quickly as possible!

Exchanges

If you need to exchange your order, the fastest and easiest way to do this is to reorder. We will ship your new order immediately and, in the meantime, please initiate a return through eBay on the original item and return it. We will refund for the returned item once it is received back.



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Company Details

365 Cycles
1180 Enterprise Rd
East Petersburg, PA 17520
United States

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