some technical opinions needed

[diovol]

So i have a deuce wheel now which is a 17x4.5 so it comes factory with a 160 on it but what do you think is the skinniest tire i could put on there safetly without it de-beading i want to run a 150 but some manufacture say a 150 is maxed on a 4inch rim? I am putting it on a roadking that i why i ask

[aka_matt]

just as a comparison, the stock dunlop 401 150/80 is 156mm wide... the ME880 is 153mm wide... the 160/70x17 ME880 is 157mm wide, and the D591 is 165mm wide... i think the 160/70 ME880 should fit ur bike...
when i put the deuce wheel on my sporty, the ME880 170/60 (169mm) was the same distance to the belt as the stock tire(156mm)... the wheel has a bit of offset in it i believe...
but to answer ur question, a 150/70 should be fine on a 4.5"