Just a quick one (hopefully)

Changing my front tyres next week. Going from CSC3's to CSC5's.
But had a thought that will it be ok having 5's on the front and 3's on the back?
 
Cool, ive heard all sorts before about people saying "Oooo, no you cant mix and match tyres" but thought it cant make that much dif cos there pretty much same.

Was probably stupid question but wanted to be sure.

Thanks.