Durability: The quality of link pins is the deciding factor for the service life of a chain. Other manufacturers` pins are surface hardened only. Wipperman`s unique XBH through-hardening process gives Wipperman`s conne X chains their unique durability & protects sprockets against premature wear. Flexibility & Rigidity: High lateral flexibility ensures a soft smooth running gear shift. High torsional strength on the other hand ensures precise chain guidance onto the sprockets. Optimised Gear Change Action: To ensure accurate & safe functioning with modern sprocket systems chains must perform at extreme angles & under high tension. This requires the inner surfaces of outer chain plates to be of an extreme cut out form. Wipperman has perfected a unique way of machining this process. Low Friction: Minimising friction reduces wear & enables the chain to operate lightly & smoothly. Wipperman`s grinding & polishing processes for all the 450 components of each chain combined with appropriate surface treatments such as nickel-plating make these the lowest friction chains available. Unlike other 9-speed chains the conne X 900 series retains the wider inner-link surface area & thickness of link plates used in 8-speed chains. This makes for a stronger chain under stress & is achieved by the minimised pin projection unique to conne X. Special shaping of the inner & outer link plates ensures optimal gear shift quality. Compatible with 9 & 8-speed systems Supplied with conne X-link 114 links MBUK Magazine Review "... special joining link which you simply clip together at an angle... good shifting performance..." Conclusion: Good value good performance Rating: 4/5