Bike Forums - Constant creaking during pedaling solution

After many attempts to identify and fix a constant creaking and sometimes clicking sound coming from my drivetrain, finally the solution. This had been going on for quite a long time. And while the noise was slight, it was irritating especially on long rides. I went through all the solutions I could find on YouTube and various diagnosis sites like Park Tools. Even cleaned and re-greased the bottom bracket and made sure the cranks were on tightly. Was starting to think maybe the bearings themselves were worn out.

It turns out to have been simply the cassette attachment to the freewheel hub. A few drops of oil in the spaces at both sides of the attachment while spinning the wheel solved the problem. The Sheldon Brown website helped confirm this:

Lubricating Freewheels

Freewheels should be oiled from time to time with a medium-weight oil.

This is easy to do, and generally requires no disassembly. Warning, though: unless the freewheel body is clean, the oil will carry grit and grime into the mechanism!

If the body is clean, do this:

Hold the bicycle with the rear wheel off the ground, and leaning to the left at about a 45 degree angle. An assistant may be helpful for this. Turn the pedals around a couple of times to get the wheel spinning fast, then let it coast (helps to be in high gear for this.)

Look inside the smallest sprocket. The sprocket will be stationary, since the wheel is coasting, but you'll see an inner part of the freewheel that is spinning with the wheel. Drip oil onto the crack between the turning part and the stationary part. Gravity and capillary action will help work oil into the freewheel.

Repeat this a few times, until you hear a change in the sound of the clicking pawls (they'll generally get quieter when the oil reaches them.)