TGR, my understanding is that Wolber Alpines are clincher rims, not tubs...is this some subtle joke I am not getting?
Anyway, try as I might, I cannot get my Module-E sidewalls to measure anything other than 1.7mm. to 1.8mm. Maybe someone can check my figures/method...
On my last attempt, I started by measuring the thickness of the butt of a spoke with a micrometer... 3 little graduations on the barrel of the micrometer is 0.075", plus 3 little graduations on the revolving 'turret' of the micrometer brings it to 0.078"
Placing the butt of the spoke against the inside face of the sidewall underneath the 'bead', I measure spoke plus sidewall... 6 little graduations on the barrel of the micrometer is 0.150", plus 2 little graduations on the revolving 'turret' of the micrometer brings it to 0.152"
Subtracting the 'spoke' thickness from the 'spoke plus sidewall' thickness should tell me the thickness of the sidewall, yes? 0.152 minus 0.078 equals 0.074, so the thickness of the sidewall is 0.074", which, according to the conversion table, is somewhere between 1.7mm and 1.8mm
Anyone still awake?
Here are some pictures... Am I alone in finding the MA2 visually unappealing next to the Module E? Bear in mind that these rims have the same nominal width of 20mm. The 'boxiness' of the MA2 makes it look much wider, at least to my eyes.. Well, they both function as rims, but the MA2 is sometimes recommended as a 'sympathetic' rim for a 'period' bike. Looking at it next to a Module E makes you wonder though, doesn't it?