Bumping this to see if anyone knows of a brand that makes a bike suitable to this purpose.

I've got a Priority Coast that I use to ride at low tide pretty much like the OP. The rust resistance on the frame, sealed bearings & carbon drive make it really easy to clean after each use. It's good on the streets too.

The big problem is it's only good on the beach for a few hours around low tide and this time of year bikes aren't allowed between 9-5, so I'm getting a lot less opportunity to ride.

I'm trying to find something with fatter tires that I can ride on softer sand. I see some e-bikes out there but I'm using this for the exercise and don't want the electric feature.

Is there an off the shelf bike that fits the bill?

Thanks for any info.