I started commuting three months ago in order to lose weight. So far I've come down from about 145kg to 127kg, but not without several problems with my rear wheel. My height is 5ft 7in.
I ride just over 10 miles a day, 5 days a week, on average quality roads in the UK. I have a Giant City Escape 3 (from that shop). The shop told me that it should be adequate for my needs. Since I bought the bike I have had broken 2 axles, so the shop advised me that a cassette-type hub would be stronger and help to prevent the problem. After replacing the hub in December I have not had a broken axle (yet!), but I have noticed that the wheel was not running true, so I they replaced the wheel free of charge today. On my way home tonight I noticed that the wheel has started to wobble again, possibly even worse than it was before. I am a careful rider (since the axle breakages, I've been extremely vigilant for potholes and bumps, and I have never jumped any kerbs), but obviously one or more of the components is not suitable for my weight. The other option is that the workmanship was poor, but I don't believe that as I know three other people who haven't had any problems with repairs at this shop.
Could anyone advise me about the type of wheel/hub (or other components) that I should be investing in to support my weight? I really need to buy something that is going to last me until I get down to a 'normal' weight, because I really can't afford to keep replacing parts every month. I'd be really grateful for any help because I'm starting to feel like it's not worth the effort!