Is this enough space on my rear wheels? 18” wheels

J.B. said
I have a 1971 Demon 8-3/4” rear with rear disc’s. The wheels are vision legends 5’s and in the rear they are 18”x9.5” 5.72”BS/+12 offset on Nitto G2 275/40R18. Are these too tight to the leaf spring? I dont see tires side flexing that much to hit the springs but wanted to know other opinions. They are pinky spaced or 1/2” from spring. Do i need a spacer or they are fine? The fronts are perfect at Front 18”x8.5” - 5.55”BS/+20 offset Nitto G2 245/40R18
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I have 1/2 an inch with 40’s on 18 inch rims with no issues.
It’s my daily driver, so it’s been tested well.
Like mentioned above the short sidewall doesn’t move much.