Tire and Tube advice

[Quickstreek]

I have a 1974 Honda CB360. Considering that the existing tires on there(althought not worn) are "sears" brand i figure they are old and should be replaced. I purchased a set of Cheng shin Hi Max tires from tiresunlimited.com . JCWhitney said that they could be run with a tube as well despite the fact that they are tubelesss type & someone with a CB350 say he had a pair on his.

I guess i just want to be reassured that they'll work and was wondering what size tube i should get because differnt site charts are telling me differnt things. I'm 110/90-18 rear and 90/90-18 front.

http://tiresunlimited.com/motorcycle_tubes.htm

http://www.webbikeworld.com/Motorcyc.../tire-data.htm

are two differnt sizes for the rear. i ordered the right ones for the front 2.75/3 but i ordered 4.00/4.5 for the rear but it doesnt match up with either chart. What do you guys think?

[chef1366]

I looked up that you need a 3.50-18.

[Quickstreek]

where did you get that from? that'll work with the tires i got?

[chef1366]

Right here.

http://www.mrcycles.com/fiche_section_detail.asp