Buyin tires 4.00h-18 & 4.00s-18?

[Docwits]

I am shopping for K70s for stock xs500 wire wheels. I am seeing sizes 4.00s-18 &4.00h-18. I assume the h stands for shouldered rim. Which do I need? Does it matter?

Thanks in advance for your help.

 

[TwoManyXS1Bs]

I believe the 's' and 'h' are the speed ratings...

 

[jayel]

yes the "S" and "H" are speed ratings, a 4.00 tire = 101.599 mm 1mm = .0393701'' so a 100/90 tire is closest to 4" if you want a fuller looking tire a 110/90 will be 4.330711 slightly over 4.25"

 

[Docwits]

Thanks guys, makes sense