Everything I've read or video's I've watched all say to stick to the manufacturers psi for tires regardless of replacement brand or model. I was reading over my paperwork from my new tires and haven't tested them yet, I'll check tomorrow but it says 36 psi front and back. The bike says 36 back and 29 front and every book or manual about my bike says the same. I'm going to call tomorrow and ask why but I thought I'd ask here first if anyone has run into this or done thing on tires they've installed. I can't see a problem with it being higher except maybe cornering grip because of being too hard? Or can a different tread paternity require more psi? Just curious before I call them so I'm not getting a line from them because they messed up?