I've got a set of the 40mm speedmetal wheels - they're good. Very good. Not the lightest thing out there, but strong enough to batter around the Fenland potholed roads all winter without a problem. Look dead nice too. http://www.cyclechat.net/attachments/176605_194401100696102_332012637_o-jpg.14660/ I'll happily recommend them to anyone who'll listen.