My Wolber Profil 20 rims says "Titane. Chrome Magnesium" on its label I guess thats the mix of metals used in formulating its alloy material. Whether that's mixed into a mostly aluminum base, I dunno as I'm not a metallurgist, but I suspect that could be the case with these 80's Wolber rims. Wolber was a big French tire manufactuer that in the 80's, bought out Super Champion a popular French rim maker and directly competed with Mavic in the 80's. I think Wolber's been gone for a while now. Mavic outlived them as they did other French manufacturers. Never heard anything really negative with Wolbers, except for some of their aero profile (Profil) rims requiring now very hard to find special nipples and washers to build up. Otherwise they were pretty reliable. I haven't had any problems so far with the Profil 20s I built up late last year. Their lightest rims weren't as lightly built as the lightest that their main competition, Mavic built, so they did not suffer as much with cracking at the rim spoke holes. Because of that plus they are not as common as Mavics certainly worth keeping to put on a C&V bike specially a French one.

Chombi