Can I run 305 40 r22 tires on stock height? - Jeep TrackHawk Forum
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post #1 of 16 Old 01-03-2020, 02:00 AM Thread Starter
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Can I run 305 40 r22 tires on stock height?

Hey guys wondering if I can run 305/40r22’s on stock height. I see most guys run 305/35 r22’s. I’d like to keep as much side wall as possible so I’d prefer the 40 aspect ratio. Thanks
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post #2 of 16 Old 01-03-2020, 08:27 AM
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How much will your speedo be off? There is a calculator online that breaks down what the actual speed is from having one tire size to the next. It might help you make your decision. If you have a diablo hand tuner you would be able to adjust your tire parameters so the speed shows to be true.

Original Tire Size
295/45/20


New Tire Size
305/40/22


Speedometer Reading
65

Calculate

Actual Speed
67.46
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post #3 of 16 Old 01-03-2020, 08:32 AM
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https://tiresize.com/speedometer-calibration/

Original Tire Size: 295/45/20

New Tire Size: 305/40/22

Speedometer Reading: 65

Actual Speed:67.46
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post #4 of 16 Old 01-03-2020, 11:12 AM
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Have you looked at a 21” wheel?
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post #5 of 16 Old 01-03-2020, 11:21 AM
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Can I run 305 40 r22 tires on stock height?

Up to 3/4 taller should not be a problem, my snow tires are just about that height, there is an ever so slight rub at full wheel lock. Im on eibach springs as well.
My question would be, is there a wide range of tire choices at that size? I seem to recall that being the issue.


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post #6 of 16 Old 01-03-2020, 12:02 PM
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You don’t have a wide range of choices now. Not with the load and speed ratings required. I thought 21” was weird at first too but then I looked at our choices in 20” and 22”. I’m still on stock wheels but I think a 21” wheel would give you enough sidewall still but look sleeker than the 20”. Just my thoughts though
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post #7 of 16 Old 01-03-2020, 12:35 PM
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Just from listening to the 22 guys talk, choice of tires in our specs is thin outside the norm.


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post #8 of 16 Old 01-04-2020, 04:25 PM Thread Starter
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Thanks for the info scottiekay! There isn’t a ton of options but there’s definitely a few in 305 35 or 40 r22’s.

I heard the 40 aspect ratio on 22’s rub slightly on stock height while wheel is fully cranked. Just trying to find someone that has this set up to see if it’s a livable issue. I wouldn’t mind if it was minor and avoidable if I just didn’t turn too hard.
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post #9 of 16 Old 01-04-2020, 04:26 PM Thread Starter
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I would just like to keep as much sidewall as possible since I’m going to 22’s. Little more flex to hook up.
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post #10 of 16 Old 01-04-2020, 05:11 PM
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Can I run 305 40 r22 tires on stock height?

305/40/22 is 31.6 tall, the exact height of the 295/50/20 snow tire I run, which rubs on full lock.


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