Hi,

I used to use bontrager and armadillo tires in my commute. As its getting dark early, I decided to get schwalbe because it has reflex side wall.

I got a pair of Schwalbe Marathon Plus 700x28c. But they are so wide that they can wrap around my rims.

Vendor told me different manufacturer measure tires differently. Is it true? The size can vary so much? A mechanic told me it must be a mis-print but he did not see a schwalbe before...

Or Schwalbe requires some special skills to install?

My wheels spec below, they have no problem take other 700x28.
Size: 700C X 18MM clincher
Profile: 30mm

Thanks!