Backcountry Pilot • 26 Good Years or 29 Airhawks?

26 Good Years or 29 Airhawks?

Have you modified your aircraft? STC? STOL Kit? Major rebuild from just a data plate?
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Re: 26 Good Years or 29 Airhawks?

Random question, but how do 8.50x10's compare to 26's?
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Re: 26 Good Years or 29 Airhawks?

Barnstormer wrote:
Battson wrote:
whee wrote:Glad you asked this. These are the two options I'll be looking at when I get the deal done on my new plane.


+1 for this comment
I have been wondering how much utility 26's offer over 8.50's. The 29" size seems popular.


I've now flown with 8.50x6's, 26 Goodyears, and 29 Bushwheels.
Image

My experience with MY 185:

The 26 Goodyears were a big improvement on floatation over the 8.50's, and with a negligible impact on cruise speed. They lessen the impact felt at landing. They definitely boosted my confidence off airport. Weight difference was noticeable. As others have said "They wear like iron" - on all surfaces. Ramp appeal is certainly better as well.

The 29's are amazing in both positive and negative ways:

1. The AOA they provide on takeoff is excellent.
2. The confidence boost they provide is excellent.
3. The off airport performance they offer is excellent.
4. They eliminate most anything felt at landing. ("Your going to run over the tire that marks the beginning of the runway"...."What tire? I don't see a tire.")
5. The ramp appeal is excellent.
6. The cruise speed hit I took was large, somewhere between 10 - 15 mph, probably closer to 15. With a tail wind I can negate some of it by going high. Headwind no.
7. Weight difference over the 26's is definitely noticeable.
8. Braking effectiveness is much reduced.
9. It's well documented they are very unhappy on pavement, and that is NOT what they are intended for. But they are also unhappy on any surface as hard as or nearly as hard as pavement.

Note: In purchasing the 185 I wasn't looking to buy a Jeep, I was looking to buy a Raptor. Go off road but also go fast, go high, carry four people, full fuel, and all our gear - and the 185 does that well.

I have no regrets on buying either the 26's or the 29's. Time will tell which one ends up the permanent shoes for the wagon, perhaps both will - I certainly will not go back to the 8.50x6's.


Barnstormer, how much pressure were you using in your 26's?

Marty
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Re: 26 Good Years or 29 Airhawks?

Barnstormer wrote:*Heaps of useful stuff*

Thanks Barnstormer - that post was great.
The picture certainly tells a story, which your experience corroborates.
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Re: 26 Good Years or 29 Airhawks?

180jocky wrote:
Barnstormer, how much pressure were you using in your 26's?

Marty


Marty,

I was using 18psi when on pavement and 12psi off airport.

I was concerned about going any lower (and just a bit concerned at 12) for fear of spinning the tire on the rim under hard braking (or even landing on hard pack) and shearing the tube's valve stem. I considered an old sand dragster trick of drilling through the wheel cover screw holes and using screws to secure the tires but hadn't yet determined if I was compromising the wheels by doing that. Somebody, I think MTV, recommended applying contact cement to the wheels and tires before assemblying. With the quality of today's contact cements, with the right one, I'll bet that would work well, but I changed to the Bushwheels before having a chance to try that.

I did paint alignment marks on both the tire and the wheel and included those as part of every preflight. I never saw any movement.
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Re: 26 Good Years or 29 Airhawks?

Has anyone else noticed that different sites claim different weights for shaved 29" Airhawks? Desser advertises 20 lbs for their shaved version. At 20 lbs + adapter + tube + wheel/rotor the weight is almost identical to a 6" wheel/rotor with 29" ABW (~37 lbs each side). I'll weigh mine when I get my plane back. It's looking like I'll be heading to Oregon around the end of July to pick her up.
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Re: 26 Good Years or 29 Airhawks?

I've said this before, but once again, I'll point out that Goodyear 8:50 x 6:00 tires are somewhat larger in diameter than MacReary tires of the same "size".

I would point out that the 8:50 tire in the photo above is a MacReary tire, not a Goodyear.

I have run a lot of 8:50 tires, and my experience suggests that you'll get a larger tire with the Goodyears, AND it'll last twice as long.

MTV
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Re: 26 Good Years or 29 Airhawks?

26" goodyears are considerably bigger than the 8.50x6 of any make. And are an improvement! The 29" shaved are heavier. Even shaved. And the shaved still have appx 1/4" of tread on them.
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