Tire size and gearing questions... - JeepForum.com

 
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post #1 of 4 Old 09-27-2014, 02:17 PM Thread Starter
firejeep42
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Tire size and gearing questions...

This isn't the typical can I put x tire on my d35 thread....

I'm getting ready for my axle swap this spring and am putting parts together and had a few questions.

First off, the axles are a hp D44 front, and a 9" rear. Chromoly shafts, selectable lockers so they will handle the tires I'm looking into. I'll be putting on a clayton 5.5" long arm set up at the same time. With that and the 1.25 bl, I've been stuck on what size tires to run. I'm torn between 35"s and 37"s (I'm aware of having to stretch). I know it will clear 37"s but I'm afraid of not having enough room to flex and limiting my suspension travel to the point of being better of on 35"s. I did plan on going to metal cloak fenders at some point, but that may not be for a while. Hopefully some of you guys who ran this or similar lift setup can chime in and speak from experience. My question is, will I be able to flex on 37"s enough to make them a better choice over the 35"s

The next thing I'm stuck on is gears. I was pretty set on going 4.88s but the thought of doing 5.13s has been creeping into my mind. This isn't my DD, and doesn't see much highway time but it does get the occasional trip up the turnpike. I don't want to be redlining to keep up with traffic, but on the other hand I want to have enough power when I'm wheeling.

Hopefully you guys can throw some input an experience in here


~Dave~
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post #2 of 4 Old 09-27-2014, 02:59 PM
durango-bob
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There is only a 5% difference in the gearing that you are pondering, so you really won't notice much difference between them. Sound like you are more interested in off road performance so the 5.13 will most likely serve you best. As for the tires, if you find that the 37's rub too much you can add some bump stop extensions to fix that. Your tire size should be determined by your intended use and what will meet those needs the best.
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post #3 of 4 Old 09-27-2014, 03:11 PM
Jerry Bransford
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For your AX-15, I'd definitely go 5.13 or 5.38 for 37" tires. 4.88 is ideal for 35's and your transmission but it's not for 37's. Having been burned by undergearing once years ago, I'd probably go 5.38 myself.

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post #4 of 4 Old 09-27-2014, 04:36 PM Thread Starter
firejeep42
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Quote:
Originally Posted by durango-bob View Post
As for the tires, if you find that the 37's rub too much you can add some bump stop extensions to fix that. Your tire size should be determined by your intended use and what will meet those needs the best.
Right, I planned on ultimately stepping up to 37"s in the long run. But I'm just concerned about losing too much flex or if I'd have to add too much bump stop with the stock fenders

Quote:
Originally Posted by Jerry Bransford View Post
For your AX-15, I'd definitely go 5.13 or 5.38 for 37" tires. 4.88 is ideal for 35's and your transmission but it's not for 37's. Having been burned by undergearing once years ago, I'd probably go 5.38 myself.
37"s are the biggest I plan on going.. For now atleast....

Looks like you guys talked me into the 5.13s

~Dave~
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