Impossible to get 120 PSI into my tyre?

[LarryDuff]

I'm running 80 psi in my 28mm ty res on my road bike and I'm 12st 6. Definitely feels a lot comfier on the bad roads round here.

 

[raleighnut]

I'm running 80 psi in my 28mm ty res on my road bike and I'm 12st 6. Definitely feels a lot comfier on the bad roads round here.

I run 28s at 80psi on the front tyre but at 100kg I need 95-100 on the back.