they make bearings for crank grind jobs .0100 under for instance
but what if the crank is ground just a little too much or for what ever reason the bearing was made wrong or just packaged wrong
the point of the 5 dollar plasti gauge is to make sure every thing and every one has done what their supposed too. if the plastiguage shows me a vary small difference i mic the crank and borrow a dial bore gauge and make sure but if its off much the plasti gauge will tell you
