Hi there, I'm looking to build a new wheelset for my everyday bike/tourer (currently running 27" single wall Wolbers laced to old shimano hubs). I've got a spare CR-18 kicking around that I was going to lace to a dyno-hub and then set up a rear wheel with an asymmetrical rim (velocity synnergy) and a 130mm rear hub (bike is currently spaced to 126). The velocity rims, however, are wider (only by .5mm) than the CR 18. Could this pose any problems at all? Also, is the general wisdom in the touring community to use butted or straight gauge spokes?