I will fly to BKK in the first week of December and start cycling from Chumphon in the South around the 6th. I want to travel to the North, maybe Surat Thani and Issan. But if you have other or better plans I might adapt to them.
I can cycle up to 100 miles per day max. but will also enjoy (much) shorter day trips - especially in the tropical heat ;-)
I have cycled in Thailand many times before, also in Laos and Cambodia. I have to leave end of January.
Happy trails, Jörg.