What's the hub bore on a 54?

[Matt300ZXT]

I took a piece of string and wrapped it around mine on the front of my 54 1/2 ton 2 wheel drive truck and cut it where the string met itself and the circumfrence measured riiiiight at 8.25". I did a calculation and came up with a diameter of about 2.65". Just want to make sure my math was right. If someone on here has a nice digital caliper, would ya be able to go outside and measure just to make sure I'm right?

[dwcsr]

Not sure what bore your measuring, Seal bore, brg bore, inner or outer?

The inner wheel bearing sizes are as follows.
ND 909552 inner cone 1-7/8" (1.875) OD x 1-9/32 ID (1.2813) This sits on the spindle
ND 909602 Cup 2-7/8 OD (2.875)x 2-21/64 ID (2.328) This is in the hub