http://qualityfarmsupply.com/t/cate...bore-pulleys/idler-pulleys-for-v-belts?page=2 5" i believe so i have some pulleys like this on my everride. what type of bearings are these? are they sealed? i have a couple that i think are going bad? it looks like the bearings are punch pressed into the pulley. i have to replace the whole assembly? i kind of a cheapO can i just machine off the one side and replace bearing and spot weld it back in place?