Okay, so I bought some 30in Terrabites to replace my stock tires on my HD10 XT. I haven't mounted them on my rims yet, and noticed they didn't seem that tall. When I measured them they were only 28.5in. Do these things distort and gain height once they are mounted, or do these tires measure shorter than what they advertise? Sorry, I am new to upsizing on tires and never really measured them pre and post mounting.