is it ok to buy these books without trying them on? or could i try any other salomon in store and hope this fits too?

It really depends on the width of your feet. If your feet are average to wider-than-average, they should fit fine. I was able to break them in after a two mile moderate hike with no issues, hot spots, or slippage. They fit better than any shoe I've obtained from a retail store. Some have reported pinching right behind the toes, but this was never an issue for me. If you do get them and they don't fit, the return policy is A+.
View Details: Salomon Mega Trek 6 Light GTX Backpacking Boot - Men's >