The worst pedal I have had to service, DA 7410. I take them to the LBS and ask if they have the tool to service them. They look at them and tell me that they aren't serviceable, I should throw them away and buy new. I tell them that it's a Dura-Ace pedal and they tell me the person who sold them to me lied. I left and found the tool for the spindle on the net, bought bearings and waited for the mailman. Some times the hard part isn't the work. When I took out the rear spring to clean every thing the rubber block has Shimano 7410 stamped in it. I don't take the advice of the LBS, it's not worth it. The bearings, tool and grease came to a total of 15$. I originaly got the pedals because they were on a crank that the owner couldn't get them off when he sold me the crank.