QUAD CHAIN WHEEL CONVERSION SET FROM 18 SPEED BIKE TO 24 SPEED BIKE AXLE,SHIFTER
FREE SHIMANO LEFT-HAND THUMB SHIFTER. YOU SHOULD BE ABLE TO USE YOUR EXISTING TRIPLE FRONT DERAILLEUR TO OPERATE SHIFTING, DEPENDANT ON TYPE YOU HAVE CURRENTLY. RARE THUN QUAD (4) CHAINWHEEL CONVERSION KIT FOR 24 SPD.