Blackburn interlock rear rackthe interlock rear rack has practically all the bells and whistles blackburn has to offer whether commuting to and from work or going on an overnight trip youre all set to pack your panniers or trunk bags the interlock rear rack works well with all of blackburns interlock compatible bags and mounts perfectly with 26 700c or 29 wheels the rear rack can handle up to 20 5kg and is made from aircraft grade 6061 aluminium tubing featuresmaterial aircraft grade 6