The record groupset this year presents the new record 10s ultra narrow chain that is just 59 mm wide owing to its dimensions44 the new version is lighter and quieter and facilitates adjustment of the rear derailleur chain links and pins are hollow so that the chain weighs only 255 g in all the tests run in our laboratories have shown that traction force44 pin retention force44 wear44 resistance to stretch44 torsion and flection are the same as for the record 10s chaintop fea