Hello everyone! I want to ask you a question! I know a little about the difference between BSA and BB30. BSA is English standard and have screw thread inside the hole ,usually  use  in  shimano,while BB30 is Italian standard and don't have screw thread, usually use in CP. But I wonder if they have some other difference. I will be appreciate if you can tell me ~ Thank you!

I search some information on internet and find out good stem with handlebar carbon is really important to you if you want to ride bicycle comfortably you must consider carefully. The properties of carbon fibers, such as high stiffness, high tensile strength, low weight, high chemical resistance,  high temperature tolerance and low thermal expansion. So you  needn't  worry about that. Good quality will not crack! I also look through an website I think you will be interested in http://www.windsailbike.com/carbon-handlebars