Maximum tyre width for 2002 KH29

My kris holm 29er unicycle, is the model before the new 2015 (with disc brake) which I believe came out in 2012.

What is the maximum tyre width you can fit onto a 2012 KH29?

I got a 2.5" wide tyre on mine, not sure if I could go any wider. I’d like a 3", but I don’t want to buy a new frame. Has anyone put a 3" tyre on a 2012 KH29? Thanks.

Pictures would help. But I highly doubt a 3" tire would fit in a 2012. That was a reason of the upgrade of the new KH.

My 07 KH29 and 09 KH36 frames both have 82mm between the legs near the crown. Your 2012 KH29 is likely similar.

I like to have 5mm of clearance on each side to prevent rubbing. (you can go less if you don’t mind the occasional rubbage)

82mm -5 -5 = 72mm => 2.8"

A “skinny” 3" like a 26x3 durro might fit but the new 29x3 tires likely won’t.