Great plan, poor execution

[Chargeride]

I don't usually oil my chain when on the beach, maybe with dry lube or a tiny bit of wd40.
The bike I'm using here in Wales has a very thickly oiled chain, it immediately collected a whole dunes worth of sand and started making crunching noises so loud it caused entire families to turn around expecting to see someone operating a cement mixer.

 

[Chargeride]

Only motorcycles have O ring chains, but the X ring chain could possibly be suitable for ebikes, I don't know if they work with derailleurs.

X-ring chain - Wikipedia

en.m.wikipedia.org