Hello everyone, I'm new to the board, and it's been helpful reading though a lot of the posts.
I bought a 22" Raleigh Oakland about six weeks ago for commuting. Most of my riding is on roads or paved cycle paths, with some cobblestones and other bumps along the way. I'm 6'2" and about 250 lbs.
Three weeks ago, my front wheel tacoed going around a corner at a slow pace (slow enough that I caught myself pretty easily, didn't hit the ground). I had it repaired, and had no troubles until today, when my rear wheel folded over just after I came to a stop at an intersection. The wheels are the standard alloy set that come with the bike. I'm not sure of the spoke count, as it's currently in the shop and I can't go look, but I'd assume it's fairly high, as it's a Trekking bike.
So, I'm pretty frustrated now, because I really don't know what it is that I'm doing wrong. The riding I'm doing is 5 to 7 miles a day, and generally good terrain. So the question I have is: should I look to upgrade to sturdier wheels, or can this be remedied through a change in the way I cycle? I don't have a lot of money to play around with (just a poor grad student) but repair bills will pile up fast if this keeps up.