So even though they're barely different (a tiny bit less wide, mathematically), there'll be that much of a difference diameter wise? wow.

Which one of these should I go with, do you think?

Pyramid Tire 24 x 1-3/8 Black/Black Road K40 --- $3.35
http://www.amazon.com/Pyramid-Tire-1.../dp/B000AO7I0G

Kenda S-5 24" x 1-3/8" x 1-1/4" Black Steel --- $9.62
http://www.amazon.com/Kenda-S-5-1-3-...ef=pd_sbs_sg_8

Pyramid Tire 24 x 1-1/4 (Schwinn S6) Black Tread / Gum Wall Street K23 --- $8.48
http://www.amazon.com/Pyramid-Schwin...ef=pd_sbs_sg_9

Thanks!