".....you can be assured that the wing is still lifting...."

I think "Pusher" is right, in the very first post on this thread there was a reference to the "bottoming load" of 4320. Maybe somebody can confirm by posting the certification relationship between aircraft gross weight, tire load rating, and bottoming load.

Overkill is going to cost extra weight and money. As much as I'd like to go to GY26, the 8:50 at 12 psi seem to be doing everything I need right now.

I recently got a close look at the Desser Aero Classic smooth 8.50 tires, I really noticed how much smaller they are compared to a Goodyear 8.50, let alone the GY26.
I guess all 8.50's really aren't created equal, but then Mike V already said that.

The Atlee Dodge letter from the FAA for 8.50-6 tire on Cessna 180's and 170's calls for 4 ply tires.


I don't think any one would fault you for using 6 ply tires. Aircraft tire ratings are per tire. That weight is distributed over 3 tires. Goodyear 8.50-6 6 ply ribbed tires are rated at 2275 lbs. The Goodyear 8.00-6 6ply tires are rated at 2050lbs, that's what I am currently running on the 170. I have not put my aircraft on scales but at max gross I bet is less than 1000lbs per main tire.


The benefit of the Desser Tundra for me would be a bigger tire at less weight, and lack of ribs to throw rocks at the tail. Goodyear 8.50-6 weight 13.3lbs the dresser 10lbs. A weight savings of 6.6 lbs, some guys are spending $1000's to save that amount of weight. They can be installed without a field approval using the Atlee letter and a mechanics 337.

I think it would be a good tire for the 170, and will fit my mission profile.

Yep looks like it will not ship till the end of February.

Food for thought, my work aircraft has a gross weight of 42,000 lbs. It's on 5 8.50-10 12ply tires rated at 9000lb.

Cheers
Ken

Ken,

One more time: It's DESSER Tire, NOT Dresser. A dresser is where you store your undies.

MTV

Thanks for the correction Mike. I got caught by auto correct on the iPad and did not see it before I posted. Damn that Auto Correct.

Waterboy wrote:Thanks for the correction Mike. I got caught by auto correct on the iPad and did not see it before I posted. Damn that Auto Correct.

I know......I use one too......I've considered turning auto correct off, but then I'd have no excuses for my mis spellings.

MTV

Looking to see how these play out. I want some 8.50 x 6's for the Stinson, but I don't need them for a few months yet. I'm unsure which tires I want to get at this point.

Tadpole wrote:Looking to see how these play out. I want some 8.50 x 6's for the Stinson, but I don't need them for a few months yet. I'm unsure which tires I want to get at this point.

As I've noted before, if you want the largest diameter and the best longevity, buy Goodyear 8.50s. They wear like iron.

I've not seen any of these new tires, but from Battsons comment, it doesn't sound like they're very big. And if they're as light as they claim, there isn't much rubber there.

I suspect these would be great for LSA, where the plane would weigh less, and tires would wear less.

MTV

Battson wrote:I recently got a close look at the Desser Aero Classic smooth 8.50 tires, I really noticed how much smaller they are compared to a Goodyear 8.50, let alone the GY26.
I guess all 8.50's really aren't created equal, but then Mike V already said that.

Desser claims 22" diameter ("height").
Measured the Goodyear 850-6's on my 180: 22" diameter.
Measured the Airtrac 850-6's on my buddy's Pacer: 22".
They all sound about the same to me.

My 850 GY's *look* bigger than my buddy's airtracs, but the diameter measures out the same.

The 850's on my previous airplanes have been Airtracs, and they seem to wear plenty good and last a long time. I do like the rounded profile of the airtracs compared to the squarish GY's.

I have them on the Bearhawk, but it will be a while before they see any action. They're mostly just cheap shoes for the test flights and then it's on to bushwheels. I did get a report from a friend who tried them, went through 2 pair that wouldn't balance, and he returned them. He may have been smoking drugs though. Hello, friend.

hotrod180 wrote:

Battson wrote:I recently got a close look at the Desser Aero Classic smooth 8.50 tires, I really noticed how much smaller they are compared to a Goodyear 8.50, let alone the GY26.
I guess all 8.50's really aren't created equal, but then Mike V already said that.

Desser claims 22" diameter ("height").
Measured the Goodyear 850-6's on my 180: 22" diameter.
Measured the Airtrac 850-6's on my buddy's Pacer: 22".
They all sound about the same to me.

My 850 GY's *look* bigger than my buddy's airtracs, but the diameter measures out the same.

The 850's on my previous airplanes have been Airtracs, and they seem to wear plenty good and last a long time. I do like the rounded profile of the airtracs compared to the squarish GY's.

Well, I didn't have them side by side, so yes it could have been an optical illusion.

Then again, Goodyear claims to be selling 26" tires, but they are more like 23" mounted on a standard wheel with the weight of an aircraft resting on them. Maybe Desser has the same issue?

My 8.50x6 Air Tracs measure 18" on my S7. Desser claims 22" for their new tires. Also lighter and without tread so I ordered them. will be disappointed if they are not bigger than 18" but the fact that their lighter and smooth should be a plus. I will put my Air Tracs up for sale and also my 8" Matco tailwheel (including tire and tube)

Arnold

Our Desser smoothie 8.50's are 21" and change on the S7S/Matco. I suppose 22" is possible with enough air pressure.

21" and change would be great. Really looking forward to receiving them. I plan to use tubes and install sheet metal screws through the rim and into the bead of the tire to keep them from creeping and shearing off the stems. What pressure are you using in them.

Battson wrote: ....Then again, Goodyear claims to be selling 26" tires, but they are more like 23" mounted on a standard wheel with the weight of an aircraft resting on them. Maybe Desser has the same issue?

Like I said, I measured out my 850 GY's at 22" diameter. I stood a 26" GY alongside, and even unmounted/uninflated it looked noticeably bigger. I didn't measure it but would have believed 26".

hotrod180 wrote:

Battson wrote: ....Then again, Goodyear claims to be selling 26" tires, but they are more like 23" mounted on a standard wheel with the weight of an aircraft resting on them. Maybe Desser has the same issue?

Like I said, I measured out my 850 GY's at 22" diameter. I stood a 26" GY alongside, and even unmounted/uninflated it looked noticeably bigger. I didn't measure it but would have believed 26".

I have mounted + inflated GY26's on my Bearhawk. They are about 23" in height with the weight of the unloaded aircraft on them.

But yes they LOOKED a lot larger than the 8.50 Desser offering to me, which was also mounted and inflated, albeit on a much lighter aircraft. They are definitely larger than the 8.50 GY but not by a huge margin. Also they are definitely shorter than a 26" ABW, but again there's not much in it.

I don't know if measuring the "height" of the tires is a good way to compare. If one is under/over-inflated, it will skew the results. Ditto if one is more lightly constructed. I've been measuring the diameter horizontally.

I wonder if they will compress with age. I just had a physical and I seem to be 2" shorter.

My wife said the same thing to me.

hotrod180 wrote:I don't know if measuring the "height" of the tires is a good way to compare. If one is under/over-inflated, it will skew the results. Ditto if one is more lightly constructed. I've been measuring the diameter horizontally.

Good ideal.
I'll try that this weekend.