Originally Posted by
63rickert
Referring to link already posted above the mfr gives 110kg as max total load for a bike with zac19 rims. OP has stated the tandem in question weighs 470 pounds. Mfr has several other rims with rated capacity of 130kg and at least one with 180kg capacity. Just going by what the people making and selling the rim have to say.
One more time the mfr gives max spoke tension for a zac19 as 1300Nm which is very close to 130kgpf.
My experience is the zac19 is pretty good. I'd not use it for a tandem, not even a light one.
The mfr is Weinmann, not Ryde. The mfrs have models with same name, apparently some history between mfrs, though not sure if same rim. The 120kgf I posted was for the inflated wheel. I would have liked a beefier rim, but these are the rims we have, no eyelets, no washers. If the rating is 130 then I will leave at 120 and if the rim does fail, will go with Ryde Andra.