... pay it.For the wheel size, we have 10",12", 16", 17",20", 24", 26", 28" available, please advise us the size ... : For 12" wheel, the tire size is 2.125; For 16" wheel, normally we send size of 2.125, but we ... need size 2.5, please specify it to us; For 20", 24", the tire size is 1.75; For 26" wheel ...