[C40_guy]

I have a two year old Neo 2T that has a rhythmic thump while applying pressure to the pedals.

Not quite sure where it's coming from, I've tightened/examined the obvious culprits. Before I start swapping parts, I'd appreciate some thoughts on where the source is most likely to be.

I *feel* the thump just after the top of the right pedal revolution, and only when pedaling with at least moderate pressure. I can't seem to replicate it by hand. It doesn't show up when turning the cranks lightly.

Configuration:

Trek aluminum frame
Record or Chorus bottom bracket
older Record carbon crankset with new Centaur chainrings
Old Look CX7 pedals
newish chain
new Chorus cassette
Record silver derailleur

Neo 2T with Raxles update (from new)

If I were to guess, I'd say it's an axle problem, either bottom bracket or pedal...possibly also the Neo itself...

It's not a metallic thunk, so I don't think it's chain related.

Everything is clean, no rust, lightly/occasionally used, no heavy efforts

Thoughts appreciated.