A little over a month ago I got my first bike (Specialized Expedition Sport) and rode it for 250 miles with zero problems when I weighed 370lbs. Then I wanted to go a little faster, so I bought a Trek FX 7.2 and have ridden it about 120 miles now. In that 120 miles, I have broken two spokes on the rear wheel now and I'm down to 348lbs. I'm trying to figure out why the new bike is breaking spokes so quickly and the first bike did not. Also trying to figure out what needs to be done in order to keep it from continuing. Any ideas? Thanks in advance.