I got my new rigid fork today. I asked my bike shop dude if it was hard to install and he said no, that I could do it easily. But I am looking at the steerer tube on my old fork, and the new fork, and there is something missing on the new fork. I think it is the race. I am not sure if that is what it is called but my bike shop dude reffered to it when he was explaining. All that is irrelevent I guess. What is wrong is that on my old fork, on the steer tube, there is a grove that fits around the bearing and snugs them up to the bottom/inside part of my headset. On the new fork, there is no such thing. Is this a piece I need to buy? Or is it a piece I can take off my old fork? And if so, can I take it off, or do I have to get my bike shop dude to take it off?