295-50-15 on a 7" wide rim

[Phils88GMC]

I have this 88 GMC Sierra that has been lowered in the back (not sure how much) and was curious is a 295-50-15 will fit on my factory steelie's. I think they are 7" wide but not positive. What do ya'll think? Thanks Here are some pics

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[GMCTRUCKS]

To me the tire is to wide let me put them on my 10'' wheels.

 

[La 90sierra]

the tires will fit. my cousin has some on his factory alluminum 15'' rims. they look sweet

 

[La 90sierra]

i'll try to post a pic later on today when i go to his house