I recently bought a 2013 District S Trek a little over 6 months ago. Everything has been great, it's a beautiful & fast bike. A little over a month ago I broke one spoke, being somewhat new to the single speed bike style I kept riding, but I taped the spoke to another (I know, I'm a newbie). This lead to 3 other spokes breaking so I took my bike to the LBS, they replaced the broken spokes. I thought the original spoke broke from dropping the bike or something, and the broken spoke led to others breaking, so I thought no big deal. Then, a couple of weeks ago I broke two more spokes! Returning to the shop again, I asked the owner if I had a defect rim to which he replied I'm breaking spokes because it's a single speed. That is a satisfactory answer. He gave me some pointers on how to ride, don't jump curbs, be gentle and gradually get up to speed before you really start moving. Okay, so I have been riding that way, for the most part and obviously not "jumping curves" with a road bike. Last night riding home from work, I heard a popping sound and realized that I broke another spoke, when I got home I checked and saw that two spokes had broken! This is all in the rear wheel. Not only is this costly to keep going back to the shop because I don't have the knowledge or resources on how to re-thread a spoke, but it's also annoying and destroying my riding time. I use my bike for fitness and commute. I weigh 210 - 220 lbs (losing weight though, would like to get back to 185 lbs), and usually have a bag on me but that just has shoes and a pair of clothes so maybe 7 lbs, tops. I am not new to biking, just single speed road biking. I've used a mountain bike or BMX over the last 15 years (I'm 22). Could this be a defect rim? Am I too heavy at 220 lbs (which isn't an unhealthy 220, since I am fit...)? I just need to know if I should by a new rim all together and if the shop I bought my bike from should compensate ($$$) to some degree. I've emailed Trek, but they take so long to get back to me. I live in Florida, if that helps (I've heard heat is terrible to spokes). Thanks in advance, any help or comments is appreciated.