Cassette Removal & Installation

Cassette Removal & Installation


this video will walk through the process of replacing cassette cogs the different procedures shown here are relevant for just about every type of cassette including the SRAM 11 and 12 speed xD cassettes hello Calvin Jones here with the Park Tool Company the removal procedure is basically to hold the cogs from rotating while you turn the lock link counterclockwise for installation you won’t need to hold the cogs in place simply turn the lock ring clockwise with force it’s a pretty simple process as long as you have the right tool for the job but before we talk tools we’ll note that not all rear sprockets remove the same way there’s another system called the freewheel and the procedures in this video are for the cassette systems not the freewheel systems it can be difficult to differentiate between the two so if you need help with that watch this other video a quick note is that the cassette cogs themselves are separated on the freehub by spacers spacers may simply be loose or the spacers can be pinned between cogs the tools and supplies needed are grease or anti-seize to lubricate the threads a chain whip to hold the cassette during removal and a wrench or some way to drive the correct lock ring removal tool [Music] here’s a simple way to choose the correct lockring tool look at the brand of the rear derailleur it can be safely assumed that if the derailleur is branded Campagnolo you’ll need the BB t5 /fr 11 if a derailleur is any other brand including Shimano SRAM Sun race or others you’ll need one of the fr 5 series of tools these fr 5 tools all have the same block ring tool fitting but they have unique features which will be covered if you walk through the process begin by removing the rear wheel this bike does not have a Campagnolo derailleur so we’ll use a lock ring tool from the fr 5 series for the fr 5.2 it is useful to use a skewer as a tool holder due to the design of some cassette hubs it can be very little tool engagement and the lock ring because of this the tool may slip out under heavy torque to prevent this remove the quick release skewer nut and spring engage the lock ring tool and reinstall the nut snug the nut to the cassette lockring tool the fr 5.2 G has a guide pin this prevents the tool from rocking sideways and becoming disengaged so we do not use the skewer nut to hold the tool in place there far 5.2 GT has a larger guide pin for the 12 millimeter thru-axle rear hubs the fr 5 H has a handle built into the tool the head has a large hole that fits over the skewer adjusting nut the skewer nut inside the head acts as a guide to keep the sprockets from rotating freely we need to hold them in place with the chain whip there are different styles of chain whips on the plier style chain whip notice we’ve selected one of the smaller cogs to make the handle easier to squeeze on these style chain whips engaged the fixed section of chain and wrap the free piece around the same sprocket turn the remover counterclockwise using a large adjustable wrench or a one inch wrench the noise is from the serrations in the lock ring in the first cog these lock against one another as the ring is tightened if you use the skewer to hold the tool stop and remove the skewer before continuing to remove the lock ring once the lock ring is out and we removed the cassette stack we are done with removal another useful technique is to use your body weight to your advantage by placing the wheel on the ground another technique is to hold the tool in device with the sprockets facing down the vise acts as the opposing wrench turn the chain whip counterclockwise as viewed from above do not attempt to hold the wheel in place in some cases there will be a spacer behind the last bracket if you are reusing the cassette throw a zip tie through them to maintain the same orientation it is common to see a plastic spoke protective behind the last bracket this can be ignored or permanently removed as the cassette does not rest against the protector in some cases the cogs can dig into an aluminum freehub body making the cassette cogs difficult to slide off use to chain whips one will be used to hold the freehub and the second will free the stuck cog by turning counterclockwise the procedure to remove the cassette from the SRAM XD is basically the same notice there is no removable lock ring instead there is a removal sleeve that accepts the lockring tool when installing a cassette inspect the splines at the freehub body there will be one extra wide space between the splines inspect the internal splines of the sprockets align the splines and engage all sprockets and spacers grease the threads inside the freehub body whichever cassette lockring tool was used for removal can be used for installation if you removed it with a quick-release skewer holding the tool use the steward for installation as well a chain whip tool is not required for installation the ratchets of the freehub body will keep it from rotating turn the locking tool clockwise with force the recommended torque is about 40 Newton meters for perceived torque that is about a 50 pound 423 kilogram pole holding a wrench eight inches from the lock ring tool double check that the cogs are secured by grabbing the cars at either end and twisting if there’s play there is likely a missing spacer check with the manufacturer for more information otherwise the cassette is ready to go the procedure for the XT freehub is similar begin by lubricating the threads inside the cassette place the cassette onto the XD free hub install the tool and turn it clockwise tighten to the same spec as before about 40 Newton meters the process is now complete but before you go a few quick things first that this video helped you out please give it a thumbs up it makes a big difference and helps get this information out to more people and back to the repair be sure to check your shifting both limit screws and the index adjustments this other video walks you through the whole process also it’s a good time to check your chain for wear the last thing you want is to get your new cassette damaged from a worn chain and finally if you want more information on any of the tools used in this video head over to Park Tool Calm [Music] thanks for watching and again if this video helped you out please give it a thumbs up tell your friends about it and of course subscribe to our channel for more repair help from Park Tool