1；See It In Action: Watch Our Demo on YouTube

2；🚩 Product Features: LUNJE® C68 Ultra-Light Quick Release Seatpost Clamp

【CNC Precision & Universal Compatibility】 The LUNJE® C68 Seatpost Clamp is precision-engineered for maximum compatibility. Available in two industry-standard sizes: 31.8mm (ideal for 27.2mm/28.6mm seatposts) and 34.9mm (perfect for 30.4mm to 31.6mm seatposts). Whether it's an MTB, Road Bike, or folding bike, our CNC-machined tolerance ensures a snug fit that eliminates seatpost slipping once and for all.

【Tool-Free Adjustment: Instant Saddle Height Control】 Designed with an ergonomic Quick Release (QR) lever, the C68 allows riders to adjust their saddle height in seconds without any hex keys. The smooth-operating cam-action mechanism provides a powerful clamping force with minimal hand effort, making it the perfect upgrade for mountain bikers tackling varying terrain or commuters sharing a family bike.

【Aviation-Grade 6061-T6 Alloy: Tough Yet Lightweight】 Crafted from aerospace-grade 6061-T6 Aluminum Alloy, the C68 undergoes high-precision CNC hollowing to shed every unnecessary gram without sacrificing structural integrity. Finished with a premium Anodized Coating, it offers exceptional resistance to scratches, rain, and mud. Our vibrant colors (Black, Red, Blue, Gold) remain vivid even after years of exposure to the elements.

【Safety & Stability: The Zero-Slip Guarantee】 Unlike cheap stamped clamps, the LUNJE® C68 features a deep-thread steel bolt and a high-toughness copper gasket. This combination ensures a consistent, even distribution of pressure around the seat tube, protecting your seatpost from crimping while providing a rock-solid hold. It’s the small component that makes a massive difference in ride safety.

3；🏭 LUNJE® – The Preferred Hardware Factory for Global E-commerce & Top Brands

Since 2012, LUNJE® has been a specialized manufacturer providing high-strength, high-aesthetic, and compliant OEM/ODM solutions for world-renowned bicycle brands, large-scale wholesalers, and top-tier sellers on Amazon, Shopee, and Lazada. As a leading Chinese component manufacturer, our production processes strictly align with the technical standards of global tier-1 brands, ensuring you receive world-class performance at Factory-Direct Pricing.

✅ Certified Excellence & Industry Standards As a full-category supplier of handlebars, stems, and seatposts, our products pass rigorous SGS Fatigue and Strength Testing and fully comply with the ISO 4210 Safety Standard. By utilizing aerospace-grade AL6061-T6 and 7075 alloys, we guarantee maximum safety and durability, protecting your brand's reputation in extreme riding conditions.

🚀 Extreme Efficiency & E-commerce Empowerment We understand the "Need for Speed" in cross-border e-commerce. For our best-selling series and colorful anodized components, we maintain massive ready-to-ship inventory. We support small-batch trial orders with same-day dispatch. Whether you are building a private label or sourcing wholesale, LUNJE® is your most stable supply chain partner in the cycling industry.

🌟 B2B Core Advantages:

Original Patent Protection: With the latest Utility Model Patent, we ensure your distribution business is free from copyright risks. 🛡️

EU Market Access: Registered with ADEME (EPR) in France (since 2023) and compliant with LUCID in Germany. Fully meets EU AGEC act requirements for barrier-free cross-border trade. 🇪🇺

Deep Customization (OEM/ODM): Supporting Logo Customization, specification development, and tailored packaging to boost your brand premium. 🎨

4；❓ Frequently Asked Questions (FAQ)

Q1: How do I choose the correct size for my bike?

31.8mm Clamp: Generally fits bike frames with a 27.2mm or 28.6mm seatpost.

34.9mm Clamp: Generally fits bike frames with a 30.4mm, 30.8mm, 30.9mm, or 31.6mm seatpost.

Pro Tip: Always measure the outside diameter of your frame's seat tube before ordering!

Q2: Is the C68 clamp compatible with Carbon Fiber seatposts? Yes, but we recommend using a torque-sensitive approach and carbon friction paste. The CNC-smooth interior of the LUNJE® C68 ensures even pressure, reducing the risk of crushing delicate carbon tubes.

Q3: Does the anodized color fade over time? No. We use a high-standard industrial anodizing process. The color is chemically bonded to the aluminum surface, providing anti-corrosive properties and long-lasting vibrance against UV rays and moisture.

Q4: Do you support bulk OEM or custom laser-logo branding? Absolutely. As the original factory, we offer deep customization services for B2B partners, including logo laser-etching, custom colors, and bespoke packaging for Amazon/Shopee sellers.

📞 Take Action Now – Get Your Exclusive Profit-Driven Quote!

LUNJE is committed to supporting bike shops, e-bike modifiers, and international distributors with factory-direct pricing and reliable lead times.

Connect with Our Factory Representative:       
For bulk pricing, technical drawings, or OEM collaboration, reach out to us directly:

📱 WeChat / WhatsApp: +86 13798419681 

📧 Email: lunje.bicycle@gmail.com

🔗 Explore More Products: https://en.koofbike.com/Product/1.html

🔗  Butted Handlebars with Certificates: https://en.koofbike.com/Product/2.html

25.4mm Series Handlebar (30-190mm High Rise) : https://en.koofbike.com/Product_detail/21.html

🔗 Classic Seatposts: https://en.koofbike.com/Product/4.html

2026 New adjustable Seatpost: https://en.koofbike.com/lunje-patented-adjustable-seatpost-factory

👉 Reinforced Riser Bars for Electric Motorcycles:

https://en.koofbike.com/Product_detail/65.html

LUNJE Factory is seeking strategic partnerships with brands and distributors. Let’s build a strong brand together. Wishing our partners great success and prosperity! 🤝