Thanks folks, will definitely get the calipers and check. If I can coax it in that would be awesome. I'm in no hurry so if it's just a matter of getting new caps and they offer said caps that would be my best option. These wheels are great and I've always liked the I9 hubs on my road bikes. I've used many and didn't realize that the end caps may have changed diameter but if it's close and I can work it out that would be my preference over buying another set of wheels for this bike.