Hey Dan!I would certainly say that both grease and oil can/will pick up dirt. Given that the bearings are pretty much shielded inside the tube, I'd say the chances of dirt getting in are minimal.I currently have 2 Swivo pedals, both of which have the new B-68 bearings. I also installed these bearings on a Swivo for TommyP. He was very happy with it!-Mark
Yes indeed Mark ... beautiful work it was! The BEST Swivo's are without a doubt the earlier models with the real roller bearings. SUPER SMOOTH to the point of WOW! Later on, in a money saving/penny pinching venture, Rogers decided to go with a "pressed/sleeve bearing" on the Swivo, and while still a very nice pedal!, those don't have the feel and total smoothness of the earlier models with the roller bearings. My MAIN Swivo, and the one I have been playing for over 15 years now, is one of the earlier models with the OEM bearings. That pedal is just as perfect today as the day it came out of the box, and it has thousands of gigs on it! The one Mark retro-fitted for me is a near identical second! The roller bearings made quite a difference, and that is now my practice room/back-up Swivo. I noticed that the more I played it, the smoother it got. I've had it now for a couple years anyway, and it's perfect!
Tommyp