Bikepics.com is a site I've been using for like 8 years now. There are others out there but this one has to be one of the best. No bs, no crap, it's all upto the point on BikePics
try a general search engine like yahoo or dogpile and narrow down what brand you're looking for
then look for that company's website
that's what i did when i was browsing for a bike
Search engines are good to get information on almost any bikes and it's parts. If I'm looking for a bike I usually visit the company's website. They use all the flash to make the experience more exciting.