Join Date: Sep 2007
Location: Dallas area, Texas
You need a wheel, not a tire. Well, you might need a tire too, but that's unrelated to spokes.
Some bike shops build wheels, some don't, and you probably went to one that doesn't. So he can sell you factory-built wheels or wheel parts, but won't build up wheels. And most factory-built wheels aren't intended for 375 lbs.
Find a local wheelbuilder- ask around who builds them, who does them well. Ask him how many spokes, what kind of rim, that stuff; if he's done a bunch of this, he'll have a good idea.
By the way, 375 lbs is heavy for a rider, but there are a lot of tandem teams that weigh that much and don't think anything about it, so it CAN be done, just a matter of working out the details.
"be careful this rando stuff is addictive and dan's the 'pusher'."