more core should mean more speed on the wheel, also as the circumference is larger and one revolution of the wheel is a futher distance the urethane will not wear as fast, they look really good but i'm not buying new parts right now, hopefully in the future i will get 125s as they should probably be standard
The urethane is the same thickness as the rest of the wheels. Adding more urethane will just make them more prone to failure.
It just looks like there isn't enough urethane because they are bigger.
And since one revolution covers more ground than a revolution from a 110 mm wheel, the wheels won't wear down as quickly as 110 mm wheels.