On a steepish descent, I hear a click click click.... So I stop to chech it out, there's about a 2" split along my rim wall. Last xmas I bought a nice Goldtech rear hub on an O.P. rim, I've been thinking I would like a nice matching front wheel as well. Looks like I've got the excuse I wanted - just as soon as I've worn out that spare 105/ CXP 21 out in the garage!