How to degrease a bicycle's drive train

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Bicycle chains turn black over time as the chain lube gets broken in from riding. This is natural and generally not a problem -- until it affects the performance of your bicycle. This comes in the form of road grit that gets attached to your chain. The danger in such a condition is the wear on your drive train parts. Without maintenance, you have to work harder to move the gears, and you have to replace parts faster due to wear. This article will explain how to do a quick chain degrease operation and a full degrease operation, which involves removing parts from your bicycle for cleaning.

Skill level:
Moderately Challenging

Things you need

  • Degrease solvent
  • Chain scrubber or cleaning tool
  • Bicycle cog brush
  • Chain breaker
  • Cassette lock ring tool
  • Chain whip
  • Optional lock ring wrench
  • Light Teflon-based chain oil

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    Degreasing a bicycle's drive train-why and the quick version.

  1. 1

    Even if you're not meticulous about the maintenance of your bicycle, you will know when it is time to degrease the chain and clean the drive train. The speed of your bicycle will be affected, and you will hear grit grinding on metal. Ignore the warning signs and you will have to replace everything that makes your bicycle move -- the chain, chain rings, cassette and rear derailleur. All of that is completely avoidable. At least once a year, and in some cases twice, you should remove all of the parts from the bicycle for a complete cleaning (or have a mechanic do it). You can get by with a quick degreasing a few times a year if needed.

    How to degrease a bicycle's drive train
  2. 2

    A quick degreasing of the drive train entails using a chain scrubber, a degreasing solution and a cassette brush. The chain scrubber will have a reservoir in the bottom. Fill the reservoir with degreasing solution and close the chain in the tool. The tool rests on bicycle's chain stay as the chain moves through it. The brushes (and, in some cases, brushes and sponges) will pick up the solution from the reservoir and use to scrub the chain as it runs through the tool. The grit will fall to the bottom of the reservoir as the chain is cleaned.

    How to degrease a bicycle's drive train
  3. 3

    When the chain appears to be nearly clean, remove it from the tool. Take the cassette brush and run it through the cassette as the free wheel turns. This will loosen grit and grime in the cassette. Take a clean towel or rag and run the chain through the rag to remove the degreaser and grime. You could and should take a towel and wipe the chain rings of excess grit and grime. The last step is to apply a light Teflon-based oil or lubricant to the chain. Run the chain as you apply the lube. Remove any excess with a towel. The chain should be very lightly oiled; anything other than that makes for grit and dirt.

    How to degrease a bicycle's drive train

    Degreasing the drive train -- the complete process

  1. 1

    The first process is to use a chain breaker and remove it from the bicycle. Soak the chain in degreaser for a short period of time. Use a cassette brush to scrub the grit and grime that has not come off in the degreaser. Run through clean water to remove the grit and degreaser. Degrease and scrub again if needed. Dry with a clean towel to remove the water when complete.

  2. 2

    Next remove the wheel and cassette. This is accomplished with a cassette locking tool and chain whip. The links of the chain whip are threaded into the cassette to use as resistance so the cassette locking tool can remove the cassette. Once the cassette is removed, it should be soaked in degreaser for a short period of time The cassette should then be scrubbed, washed in watter and dried like the chain. Return the cassette to the free wheel hub, but apply a light amount of grease to the hub. Reverse the process with the cassette locking tool and wrench.

  3. 3

    You can manage the chain rings one of two ways: First, you can use degreaser and a towel and clean the teeth until you're satisfied. Or you can remove the crank, soak the chain rings and then clean them. This is the same process employed in removal and reassembly, but you will need to use a lock ring wrench or bottom bracket tool to remove the crank.

  4. 4

    The last step is to reattach the chain, or to install a new one. Reattaching is simply threading the chain through cogs and deraileurs before using the chain breaker to join the two ends. Installing a new chain involves measuring the chain and cutting it to the correct size.

Tips and warnings

  • Quick degreasing is fine for most cleanings, but a complete cleaning should be done annually or biannually.
  • Soaking the parts is important if the degreaser is to work.
  • Use the brush to clean tougher spots.
  • You will see wear on the parts, but they should shine to the metal if clean.
  • Not degreasing the drive train means you will have to replace parts faster.
  • Carefully use the right tools and snug them down. Over-torquing can break or shear the parts or the tools.

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