I agree with this Slingshot383

BUT BEFORE YOU DO ANYTHING OTHER THAN MOUNT THEM - PUT TYPICAL AIR PRESSURE IN AND MEASURE CIRCUMFERENCE.

Not yelling - just making an important point.

If the two slicks are not within 1/2" of each other at inflated diameter, take them back. Leave the stickers on while you do this.

I have seen slicks be as much as an inch different "out of the box".

Don't forget to have them balanced.

Use screws as required on inside and out. Make sure screws are opposite each other inside and out, not staggered. Don't over-tighten screws.