ODIER 12mm Bike Trailer Thru Axle Adapter, M12 x 1.0 Thread Pitch, Heavy Duty 6061 Aluminum & Stainless Steel, Multiple Lengths (162mm - 229mm) (M12 1.0-170mm)

• [Universal Trailer Connection] Seamlessly attach your child or cargo trailer to modern bikes equipped with a 12mm thru-axle. Designed to be compatible with major trailer brands including Burley, Thule, Instep, Croozer, and more.
• [Premium Hybrid Construction] Built for maximum strength and safety. The 12mm main shaft is precision-machined from lightweight 6061 Aluminum Alloy, while the critical hitch-end head is crafted from Heavy-Duty Stainless Steel to withstand high towing tension.
• [Customizable Fit with Spacer Kit] Each adapter includes a comprehensive aluminum spacer kit (1 pcs of 1mm spacer, 2 pcs of 2mm spacer,1 pcs of 4mm spacer, and 1 pcs of tapered spacer). These allow you to adjust the effective length by up to 9mm, ensuring a snug fit for various frame widths.
• [Precision M12 x 1.0 Threading] This specific model features a fine 1.0mm thread pitch. We offer 8 precision lengths: 162, 167, 170, 174, 180, 185, 198, and 229mm. Check our sizing guide to find the perfect match for your mountain, road, or gravel bike.
• [Easy & Secure Installation] Simple setup using standard tools (5mm Allen key and 17mm wrench). The dual-tool design (internal hex drive + external lock nut) ensures the adapter stays fixed while you torque the hitch securely, preventing rotation during rides.

Unlock Family Adventures with Professional Towing Solutions Don't let a modern thru-axle frame stop you from taking the kids or gear on your next ride. Our Bike Trailer Thru Axle Adapter replaces your stock rear axle to provide a rock-solid mounting point for almost any bicycle trailer hitch. Technical Specifications: Axle Diameter: 12mm Thread Pitch: 1.0mm Materials: 6061-T6 Aluminum (Shaft) + Stainless Steel (Hitch Head) Available Lengths: 162mm | 167mm | 170mm | 174mm | 180mm | 185mm | 198mm | 229mm Critical: How to Measure Before Buying To ensure a safe and perfect fit, you must verify two measurements of your original axle: Effective Length: The total length of the 12mm diameter cylinder that passes through your bike frame. Thread Pitch: This adapter is only for 1.0mm threads. Tip: If you are unsure, please download our Printable Sizing Guide (A4). Print it at 100% scale and compare your original axle directly against the life-size diagrams. Adjustment System: Our unique spacer system (Internal $12mm$ / External $20mm$) provides ultimate flexibility. By combining the included 1mm, 2mm, and 4mm spacers, you can shorten the effective length by up to 9mm. Always ensure the purchased adapter's length is equal to or slightly longer than your original axle's effective length. Installation Guide Remove your bike’s original rear thru-axle. Install the Thru Axle Adapter into the frame using a 5mm Allen key. Slide your trailer hitch onto the protruding 10mm stud. Insert the Centering Spacer (20mm OD / 10mm ID) into the hitch’s circular recess to ensure a zero-play fit. Place the Bonded Washer (metal exterior with rubber interior) onto the 10mm threaded end. Hand-tighten the Lock Nut and adjust the trailer hitch to your preferred angle. Final Torque: Use a 5mm Allen key to hold the axle stationary while tightening the lock nut firmly with a 17mm open-end wrench.