The Robert Axle Project Lightning Rear Focus RAT 12x142mm axle replaces the bulky, proprietary factory RAT system with a sleek, ultra-lightweight, and rock-solid traditionally threaded thru-axle solution.
The Robert Axle Project has designed the ultimate upgrade for Focus owners tired of dealing with the complex and temperamental factory Rapid Axle Technology (RAT) system. While the original quarter-turn design offers fast removal on paper, it is notorious for causing subtle rear disc brake rub, developing irritating creaks under heavy climbing torque, and feeling overly fiddly to align correctly when installing a heavy rear wheel. This kit elegantly solves those frustrations by converting the setup into a reliable, standard threaded interface.
This premium kit includes both a precision-machined rear thru-axle and a custom traditionally threaded replacement nut that slips directly into your Focus frame. By removing the oversized factory levers and handles, it creates a completely clean, aerodynamic silhouette that drastically lowers the risk of catching on trailside debris or rocks. Once installed, your rear wheel locks firmly and squarely into place using a standard 6mm hex key, bringing greater clamping consistency and peace of mind to your rear triangle.
CNC machined in the USA from aerospace-grade 7075 aluminium and finished with a rugged hard-anodised coating, this axle is internally bored to minimise weight without compromising structural integrity. It is engineered to exceptionally tight tolerances, ensuring it will not shake loose during rough gravel descents or intense road sprints. It stands as a simple, durable, and highly precise hardware upgrade that makes wheel maintenance significantly more straightforward.
Focus RAT Standard Conversion: Includes a low-profile rear thru-axle and a traditionally threaded replacement nut to completely swap out the proprietary Focus RAT system.
Premium 7075 Aluminium Build: Precision CNC machined in the USA from high-grade aerospace aluminium and hard anodised for maximum longevity and resistance to wear.
Streamlined, Lightweight Profile: Weighing a mere 45 grams, the internally bored, leverless design saves weight and eliminates bulky handles that create wind drag or snag on obstacles.
Hub Spacing Standard: 12 mm x 142 mm (Rear)
Thread Pitch: M12 x 1.5
Weight: 45 g (Includes axle and replacement nut)
Tool Required: Standard 6 mm hex/Allen key
Compatibility: Focus frames with 12x142mm R.A.T. system (e.g., Mares, Paralane)
✅ Eliminates Frame Flex & Creaks: Perfect for Focus riders experiencing rear rotor rub or annoying rear-end creaking when pushing hard out of the saddle.
✅ Lightweight Performance: Ideal for weight-conscious road, cyclocross, and gravel racers looking to shave unnecessary grams from their bike's rear axle.
✅ Clean & Safe Cockpit: Excellent if you want a minimalist, low-profile rear dropout aesthetic that completely eliminates bulky protruding handles.
❌ Requires a Tool for Wheel Removal: Unlike the stock handle system, you must carry a standard 6mm hex key in your jersey pocket or saddlebag to remove the rear wheel for punctures.
❌ Strictly Focus RAT Specific: This axle system is meticulously engineered to fit only rear dropouts utilising the 12x142mm Focus RAT standard; it is not a universal axle.
❌ No Trainer or Trailer Attachment: This Lightning version is built purely for streamlined outdoor performance; it is not designed to attach hitch-style trailers or wheel-on resistance trainers.
When setting up your new Robert Axle Project conversion, take extra care to thoroughly clean the internal recess of your Focus drive-side frame arm before dropping in the new threaded replacement nut. Apply a light layer of high-quality bicycle grease to the axle shaft and threads before sliding it through your hub. Always use a calibrated torque wrench to tighten the axle to the recommended 12 N·m—this optimal, uniform clamping force is exactly what eliminates frustrating rotor rub and ensures a perfectly quiet ride!
