I'm thinking about replacing my tires with sava (or sawa on treats haha) white walls. Except the tires I had before were stock 17" and all I can find are 18" ones at treats and 16" ones at 1977. Hmm haha are these tires any good in the first place? I'm also wondering if I can fit either of them with 17" tubes (or 16" tubes for 16" tires) on my motobecane's spoked wheels. Thanks!