i use a rat shack dx399(sangean 606) in a dumptruck. its very durable!
it even fell out and got run over in the mud once! it looks a little
rough but still works perfectly. i also use a grundig mini 300 while
working construction. it hangs off the back of my baseball cap in its
little protective cover with the antenna sticking up above my head. that
would work perfectly while riding a bike. battery usage is great! i get
almost 2 weeks on two aa cells. (watch out that you dont poke any eyes
out with the antenna sticking up!)