First is the patented one way roller bearing which keeps the saddle centered and prevents all side play. The second is the floating piston design that eliminates cavitation when the post is laid on its side to be transported or hung upside down for storage.The i-7 also has a feature that is unique to its design. This is the external reservoir which has a patent pending. This reservoir allows for extra oil and air volume which allows the post to provide consistent performance in a smaller diameter. This has been a feature that has eluded the competition and prevented other air-oil seat post systems from being offered in the 27.2 diameter.
