The m200 offers fast inflation to 30psi and a maximum inflation of 50psi the 29mm barrel has a 104cc capacity more than three times that of the r200 road pump a raft of innovative features make this the fabric pump of choice for trail riderslength 235mmcapacity 104ccover handle designsandblasted aluminum bodysnap fit frame mount includedfor hi volume tyres 40psi 28barm200 valvefast inflation of large volume tyresmountain bike riders have specific demands for a pump to carry on the trail