Can you use a tandem stoker stem with a 28.6mm seatpost clamp as a regular stem on a threadless 1 1/8" fork? Unless I'm doing my math wrong, 28.6mm is very close to 1 1/8". So it seems like it would work, no?

i emailed the seller on eBay asking the same thing and they said it wouldn't work. I'm double checking here because i think the seller's wrong...

thanks for your help!