Derailleur Jockey wheel and pulley all clean

"The video didn’t go as planned—let’s call it my videography ‘disaster’—but the WD-40 worked wonders on the bike!

Somehow, I forgot to record the 'before' footage—so you’ll have to take my word for how dirty this bike was. The video jumps straight to clip #2. That makes it tough to see the full before-and-after effect.  Next week, I’ll film a proper follow-up on the other bike to show the difference clearly.
In the meantime, I have to say: WD-40 is perfect for those tight, hard-to-reach spots—like the derailleur jockey wheels and pulleys—where fingers or tools just can’t get in. Whenever I replace a chain, I always use WD-40 to clean these areas because it seeps into hidden crevices and lifts away grime and rust that’s nearly impossible to remove otherwise.
Stay tuned for the next week and bike number 2 —lesson learned!