I wasn't sure where to post this thread but i figured this is the best place... I'll be starting lessons in a week or so and i need a bass wheel to carry the bass to and from the lessons. I don't want to buy the wheel from a nearby store because it would cost me a cool $125 . Instead i want to buy the wheel of of ebay or perhaps from upton bass. Problem is, i can't get the measurement of the diameter of my endpin down. I know its either 10 mm or 3/8 in. but these measurements are so close its hard to tell. The bass is a rental so i'm leaning toward 10mm just because it is the most popular sized endpin. Does anyone have any suggestions of ways to measure the diameter accurately? Should i measure the pin or the hole/slot in the bottom which the endpin goes in? Thanks in advance for any replies.