I’ve taken off from a dead stop, on flat ground in 2nd gear with the 338 gear set and my 27” tires. I didn’t do it intentionally, the chick I was trying to impress (my wife of 40 years) was critiquing my driving skills at the time and I got distracted. She wasn’t impressed but it worked out.
If I can do that, I’m pretty sure I should be able to go up an inch or two in tire diameter and still have adequate low gear performance. A 30” tire is probably a bit much.
