Running a 5pk belt instead of a 6pk

[RichValver]

Any reason I shouldn't run a 5pk instead of a 6pk. Have a misalignment issue due to a Pas pump pulley sitting too close the the engine and a 5pk should sort the issue out without me having to replace the Pas pump again

Thoughts?

 

[bloke]

Be fine, I ran one cut down to a 3 rib for a while and no issues with it.

 

[RichValver]

Be fine, I ran one cut down to a 3 rib for a while and no issues with it.

Legend. Thanks. I keep an eye on the belt anyway so any issues I should spot

 

[YorkshireKyle]

4PK, not had a single issue

Although my radio gets louder the faster I drive