Can i fit 10.3" slicks on stock salad shooter

can i fit a 255/50/16 which is 10.3 inches wide onto my stock salad shooter?

Sounds like you might be looking at a M/T ET Street 26x10.5-16??? The size chart on the M/T website shows that tire "measured" on a 9.0" wide wheel. But M/T says the tire will work on a wheel that is no more than 1" smaller than the tread width. Since the tread width on that tire is 8.4", it will work on an 8" wide stock wheel. If its a 255/50-16 ET Street Radial, the "measured" wheel width is 8.0"

If its some other tire, look it up on that manufacturer's website.

as long as you have a big enough sidewall.