There is a killer site called “See Krabi” (SeeKrabi.com) that is listing everything about Krabi that you could possibly imagine. They have a link for the Eco Bike Tours business in Noppharat Thara as well as all kinds of phone numbers and descriptions of Krabi activities you can enjoy as a visitor or expat living in Krabi. Have a look and tell them Eric sent ya.
Krabi has waterfalls, hot springs, clear spring pools, caves, elephant trekking, biking, Railay Beach, Ao Nang Beach, Koh Phi Phi islands and a lot more. There is probably more to do in Krabi province than the next 3 decent Thailand provinces combined. Oh wait, sorry – I forgot about Phuket. Ok, barring Phuket there is probably more to see and do in Krabi than the next 5 provinces combined. Oh wait, I forgot Bangkok.
Ok, Krabi is the most beautiful province – and my favorite by far. Hands down.
At the moment there is no bike shop in Krabi Town that is renting out mountain or road bikes. There are hotels that rent the cheap $50 bikes you can buy at Tesco – usually for free or all day for 100 baht ($3).
I wish there was another place to refer you to, because I feel your pain. I bought a bike to ride myself because there just was no alternative in Krabi Town.
The site, See Krabi has a lot of things to do in the province of Krabi, Thailand – head over there and see what you can find.