SwishTi Road Bicycle Oversized Pulley Titanium Cage for Campy/Campagnolo Gray. SwishTi Titanium Road Bicycle OverSized Pulley Wheel Cage. Titanium is a strong and lightweight refractory metal. Titanium are critical to the aerospace industry, while also being used in medical, chemical and military hardware, and sporting equipment. Aerospace applications account for 80% of titanium consumption, while 20% of the metal is used in armor, medical hardware, and consumer goods. Alloys containing titanium are known for their high strength, low weight, and exceptional corrosion resistance. Despite being as strong as steel, titanium is about 40% lighter in weight. The term “narrow wide” describes the shape and profile of the individual teeth driving the chain. Each tooth alternates thickness, narrow wide narrow wide, all the way around the pulley. With an old school traditional pulley, all the teeth would be considered narrow with small differences in thickness between brands. When looking at your chain, you will see how each link is pinned together to the next and the gaps between chain links alternate from narrow to wide. The narrow wide pulley now mates seamlessly with the chain, almost locking the chain to the ring without much increase in drag. Besides, as you ride over rugged terrain, your chain moves around quite a lot. The sole purpose of the narrow wide pulley is chain retention. The narrow wide tooth pattern keeps the chain from moving left to right and eventually popping off while riding. No one likes to drop their chain on the trail, especially in a race scenario where every second counts! In addition, narrow-wide helps to clean muds more efficiently. It is also important for these narrow wide pulleys to be able to shed mud and grime to function properly. WHY USING OVERSIZED PULLEY WHEEL CAGE. Upgrade your drivetrain for ultimate efficiency and superior performance. SwishTi Wheel Bearings reduce friction, which gives you a lower rolling resistance. Upgrading your wheel bearings to oversized pulley will maximize the return you get from your energy. THE EFFICIENCY OF OSPW. The OverSized Pully Wheel system reduces friction in the pulleys by 45 % and for your optimised performance. The overall power savings of the OSPW System for Campagnolo Mechanical&EPS 11s rear derailleur reach 30%-60%, or more in some cases, over a stock setup. Almost have the same efficiency ratio with Ceramicspeed. The system is compatible up to a 32T cassettes on most bikes depending on derailluer hanger. The system consists of top 14t & bottom 16t pulley wheels fitted with low friction bearings and a lightweight cage made from titanium. Pulley Material:7075 Alloy. Top Pulley :14T sealed bearing. 78grams / 2.78oz. For 11s Campagnolo Super Record / Record / Chorus /. Buyers can return items in 30 days since receiving the items as long as keeping it unused and original box. E are a trading company and have sufficient stocks to accommodate various product requests. Our goal is to provide the cheapest and best quality products to our buyers. Just come surfing our store and enjoy it!