when using unift 14 inches does the trap stay the same

The carrollton says it has a 2 1/8 inch trap. When I buy a 14 inch unitit to put on with this toilet will I have the same trap size.

Another question is 2 1/8 considered good trap size or is it a small size compared to most toilets.

Thanks

The trapway stays the same size.
It's considered the perfect trapsize.

If it's too large, you start to lose siphon.
Too small, and you can have clogs.

Thanks Terry.