C: circumference, measured in the unit Teeth, T, which if you want to measure in real life would be roughly the distance from the tip of one tooth to the next. I think this may even be a bicycle standard, like 0.5 in.?

r: the radius of the chainring. This is important because the difference in the radius from the 32T chainring to the 33T is how much clearance to the upper guide you will lose.

P: pi, ~3.14

C1= 32T

C2 = 33T

Cdifference = C2 - C1 = 33T - 32T = 1T. The difference in circumference is 1 tooth, obviously.

C = 2Pr, formula for circumference given a radius r

Cdifference = 2Prdifference

Solve for rdifference

r = C/(2P)

Substitute 1T (one tooth) for the Cdifference and 3.14 for P

r = 1T/6.28.

You will need one tooth divided by 6.28 extra clearance, because that is how much bigger the 33T ring will be.

If 1T = 0.5 in. = 12.7 mm

Then 12.7/6.28 = 2.02 mm reduced clearance

I honestly started off wanting to help, but now I'm not sure I'm not trolling. Good luck!