Join Date: Feb 2013
Location: Near St. Louis, Missouri
Bikes: Giant Defy Advanced, Windsor Tourist
In what direction were they bent? If they are bending in such a way that the dropout was widening, I'd be afraid of that bike even if I weighed 165 lbs.
Most coaster brake wheels are held on with nuts instead of quick releases. The nut either has a large flat area on it or a large washer where it contacts the dropout. If this is missing, it could make the wheel fall out easier.