hi guys, my transam starts in 8 weeks, longest tour i've attempted, loads to do before i fly out terminal 5 on May 8, will be following the AC route along with countless others i suspect. One question, my drivetrain/chain is 2500 miles old, should i replace the chain now, or take a new and swap them over? and i read somehere about shallow cleats , cant find it on here, anyone any knowledge of these? Time has gone by so fast since this idea of mine created 18 mths ago. Mad!