I dunno - I have a set of Sugino AT's on the Trek I got at the flea market. Have been trying to get the dang cranks off ever since (Stem and seat post came off easily!). Anyway, those Sugino's are on there TIGHT! I removed the bolts over a month ago and have been riding it every day, with no loosness to date. I have the proper tools for removing the crank, but when my Craftsman wrench starts to bend with the force I am applying, I get nervous and back off. I don't want to strip the threads right out of the cranks applying too much force. I guess my next effort will be heat in the dead of winter!