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HOW TO SERVICE YOUR BIKE’S HUBS
- Sep 13, 2018 -

CUP AND CONE HUBS


You will need


  • Cone spanners – they will usually need to be 15 and 17 mm


  • Grease


  • A magnetic hex screwdriver or pick


  • A chain whip and chain removal tool


  • Adjustable spanner


  • Degreaser


  • Paper cloth or clean rags



STEP 1


We are using a rear wheel, but the procedure is also the same for the front, for the rear, first remove the cassette from the freehub body.


Next, undo the lock nut on the non-drive side, do this by using a cone spanner to hold the cone in place and another to undo the nut. Remove the locking nut and spacer with your hand.


It’s a good idea to make note of the order which you’re locking the nut, any spacers can be removed and easily reassembled later on.


Hold the lock nut on the drive side with a spanner the undo the non-drive side cone with the other hand and wind it off, you should be able to remove the axle from the hub.


STEP 2


Next, remove the bearings from the race, a magnetic screwdriver is needed to life the bearings out.


Next, clean the bearings, use a degreaser and some paper cloth, make sure that you fully clean away all of the old grease before proceeding.


By having a closer look at the bearings, the cups (pressed into the hub) and the cones, if there’s any sign of wear, they’ll need replacing.


Some cups and clone hubs are non-replaceable, if they’re worn out, you’ll need to rebuild a new hub into your wheel.


STEP 3


Take grease and apply it to the bearing race in the hub, now you’ll be able to place the bearings into the grease which can help hold them in place, you’ll need a magnetic screwdriver for this.


When all of the bearings are in place, re fix your axle and turn it to make sure they’re all installed properly. Remove the axle and then repeat the process on the other side.


STEP


Now return the axle to the freehub side, press it against the bearings and rotate it to check it’s seated correctly. Refit the cone to the non-drive side of the axle and then tighten it until it contacts the bearings, it doesn’t need to be very tight.

 


You can then spin the axle to make sure it rotates cleanly, give the axle a rub to make sure that it won’t move.


You may also need to adjust the tightness of the cone the stop any moving or dragging, if it’s too tight, the hub will not spin freely and conversely, if it’s too loose there will be movement in the axle. This step will take trial and error, but don’t rush it as a poorly adjusted hub will cause more problems in the future.


Return the other nuts, spacers and seals to the non-drive side of the axle, use the above instructions to ensure its removed in order.


When holding the cone in place, use the other spanner to tighten it against the locking nut, it’s important to check the axle will still rotate freely at this point, it’s easy to tighten the cone at this point.