I'm installing an LU-4 on my XM-708.
What size tap do I need to chase the threads on my winch bumper nutplates?

No, it isn't the same thing. I said density ratio. You are reporting pressure ratio. % oxygen doesn't change with altitude. It remains about 20.95%. And I screwed up. Got off on the wrong line of the chart. Wish I had said more so I could take it back too. :-) 8000' density ratio 0.7861 12,000' dens...

Craig, 25% and 44% are the density ratios of the standard atmosphere for the two altitudes you mentioned. I ignored temperature deviations from standard atmosphere and ignored humidity.

On a standard day, your power is ranging from 25% to 44% of sea level power. Less on a hot day. Have you considered a repower with a larger displacement engine?

Juan, I'm glad to see you are still here. I too, have been around since the Big-E days, though I don't post much.

I'm probably missing something. I've never been able to find a directional Power King larger than a 9.00x16.

W. A. is correct. Backspace has only a very minor effect on Akerman angle and doesn't change it much from stock.

Yeah, it already does that (for slightly different reasons).
I've had ruts grab the front tires and yank the steering wheel out of my hands several times.
Only caused it to turn over a couple of times though. The one downside of the 37's is that they are easy to flip.

Sounds like a spring lift would stop the top fender rubbing. (not a problem on the rear of the 708 -- they don't have rear fenders)
On the downside, I tend to run at very high off-road speeds, so steering is important.
What odd steering effects are you seeing?

P.S.
Backspacing on the rims I was planning to use is 4.43 inches.

In the rear, is it dependent on backspacing?

Is the rub at the top, due to articulation?
Or at the front and rear, due to turning?

Thanks for the tip. I like tall tires with narrow treads.
Much appreciated,
Jim

True about the SX. If they had a directional tread, I would be more interested in them.

With the bbc, I used the stock fan and water pump.