The Robert Axle Project has engineered the ultimate fix for Cervelo owners frustrated by the complex and temperamental factory Rapid Axle Technology (RAT) system. While the stock quarter-turn system sounds convenient on paper, it is notoriously fiddly to adjust, prone to creaking if slightly loose, and can shave metal off the soft internal components if overtightened. This conversion kit eliminates those headaches by replacing the entire mechanism with a clean, low-profile, and rock-solid threaded alternative.
This kit includes both a precision-machined 12x142mm thru-axle and a custom replacement derailleur hanger. The included hanger perfectly matches your Cervelo frame's original geometry to preserve crisp, snappy shifting performance, but swaps out the proprietary RAT mechanism for traditional, durable threads. Once installed, your rear wheel secures firmly into place using a standard 6mm hex key, giving you total confidence that your wheel is locked down safe and square.
CNC machined in the USA from premium 7075 aerospace-grade aluminium and finished with a rugged hard-anodised coating, this axle system is built to incredibly tight tolerances. By removing the oversized factory handles, it creates a clean, aerodynamic silhouette that won't catch on trailside obstacles or debris. Whether you are replacing a damaged factory setup or proactively upgrading for peace of mind, this kit makes wheel installation infinitely simpler and more secure.
Complete RAT Conversion Kit: Includes both a low-profile 12mm thru-axle and a matching traditionally threaded derailleur hanger to completely replace the factory Cervelo RAT system.
Premium 7075 Aluminium Construction: Precision CNC machined in the USA from aerospace-grade aluminium and hard anodised for exceptional strength and long-term durability.
Streamlined Bolt-On Profile: Eliminates bulky quick-release levers and handles, saving weight and preventing the axle from snagging on external obstacles.
Hub Spacing Standard: 12 mm x 142 mm
Total Axle Shaft Length: 170 mm
Thread Pitch: M12 x 1.75
Weight: 36 g (Axle only) / 54 g (Combined axle and hanger)
Tool Required: Standard 6 mm hex/Allen key
✅ Eliminates RAT Headaches: Perfect if your original Cervelo RAT axle is jamming, creaking, stripping its soft aluminum inserts, or causing you grief during group ride punctures.
✅ Lightweight & Aero Upgrade: Ideal for weight-conscious road and gravel riders looking to shave grams and clean up their frame's cockpit aesthetic.
✅ Crisp Shifting Retention: Great because the included replacement hanger is manufactured to original factory geometry, ensuring your rear derailleur alignment remains spot on.
❌ Requires a Tool for Wheel Removal: Unlike the stock handle system, you will need to carry a standard 6mm hex key in your saddle bag to remove the rear wheel for flat tires.
❌ Not a Universal Frame Fit: This specific kit is meticulously tailored only for Cervelo frames built around the 12x142mm rear RAT standard; it will not fit standard threaded frames.
❌ Indoor Trainer Incompatibility: This specific Lightning version is engineered for outdoor riding; if you intend to use a wheel-on indoor trainer, you will need the specialized Robert Axle Trainer variant instead.
During the initial installation, pay close attention to the included derailleur hanger. The hanger features a specific hex shape on its inside face that must mate completely flush into the corresponding recess of your Cervelo frame. Apply a light layer of high-quality bicycle grease to the axle threads and shaft before inserting it, and always use a calibrated torque wrench to tighten the axle to 12 N·m. This ensures a perfectly silent, creak-free interface and prevents any accidental loosening out on the road!
