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Neutral Handling! Acids can dissolve certain materials easily. Why call a bike Acid? Cube has got reasons. Simply put, the Acid hardtail dissolves tricky trail sections quicker than you'd think. With its high quality frame (27.5 or 19 inch), neutral handling and performance-orientated features, it leaves nothing to be desired. Frame building technologies are evolving constantly. The Acid's 661 aluminium frame with mechanically formed top and down tubes, interior cable routing and tidy details like the rear disc mount put it right at the cutting edge. Reworked Agile Ride Geometry gives the Acid the kind of balanced-but-lively handling that means you can go full throttle.The frame is disc-specific and features our very durable, multi-layer wet paint finish. Manitou's functionally superb M3 air suspension fork with 1mm travel and bar-mounted lockout lends the Acid a touch of exclusivity. It's also particularly light thanks to its aluminium steerer - a feature rarely seen at this price. The 3x1 Shimano Deore transmission with compact crank (4x3x22) and direct mount XT derailleur delivers crisp, accurate shifts even under load. Hydraulic Shimano BR-M615 disc brakes with Servo-Wave Technology bring the Acid to a halt reliably, while the 18mm front rotor is perfect for longer descents. And the CUBE cockpit incorporates Shimano I-Spec, ensuring optimal integration of gear and brake components. Advanced Mechanical Forming - With Cube's Advanced Mechanical Forming technology they can mechanically transform different frame tubes and thus optimize them without material-wearing welding work for the respective requirements. Along the obtained organic look, the production method is primarily motivated by functional reasons. Multiple converted tubes enable them to manufacture lighter and also stiffer aluminum frames. Agile Ride Geometry - Cube ran innumerable tests to develop the Agile Ride Geometry in their series of big wheel bikes. Cube also added the 27.5in wheel size to the very well received portfolio. Three important details lead to the very agile character. Increased fork offsets let them achieve the same trail as their 26in bikes without having to steepen the head angle, thus maintaining generous toe clearance to the front wheel. Secondly they shortened the chain stays without compromising the seat angle. They invented a patented construction to mount the front derailleur to give them more tyre clearance while keeping a conventional seat angle, leading to a perfect riding position for every rider size. Last but not least Cube kept the BB height the same as on their 26in bikes. These measures lead to a natural riding position. Every mountain biker will feel immediately at home on a CUBE 29er or 27.5. Aluminium Lite - 661 aluminium alloy requires a heat treatment for the finished product. It is a stiff, very corrosion resistant, fatigue resistant,high-elongation material suitable for light tubesets with high stiffness. Frame Safe System - To protect Cube's high-end aluminium frames from damage, they are built with the CUBE Frame Save System replaceable derailleur hanger. The mounting thread is in the hanger and not in the frame as usual. In case of a crash, this hanger can be easily and quickly replaced by a new one. Integrated Cable Routing - Internally routed cables offer many advantages. Cables are protected from dirt for longer life, weight is saved thanks to the absence of external housing and the bike has a clean, sleek appearance. Wet Paint Surface - On polished, brushed aluminium and all HPC frames, the logos and graphics are applied in multi-layer wet paint. Cube use this surface treatment technology mainly to save weight. Easy Mount Kickstand - The Easy Mount Kick Stand is a new system developed and designed by CUBE. The base of the stand is mounted from below to a fitting plate integrated to the frame and fixed with a through bolt. This kick stand is extremely stiff and solid through the enlarged contact areas between base and frame which gives a stable stand even with loaded panniers.