Made from Aero grade aluminium, these CNC machined snail cams are available in a range of colours to suit most manufacturers bikes. The cams allow you to adjust the chain without removing links Apico Snail Cam/Chain adjusters for all Gas Gas trial bikes 2007-2013 using a 20mm rear spindle. Manufactured using Aero grade aluminium, these CNC machined snail cams are available in a range of colours to suit most gas gas models 2007-2013 using a 20mm rear spindle.