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Airframe Ideas

8 inch tires
Author Last Post
30 plus yrs 850 recaps best deal in town
 
I've used Desser 800 retreads for about 12 years.  I use to burn through new tires in about 250 landings.  These retreads go well beyond that..They go so far I stopped keeping track.  Never had an issue with them and I am on third set.


-----Original Message-----
From: David Rabazzi (david.rabazzi@gmail.com) <mailer@mail2.clubexpress.com>
To: Airframe Ideas <AirframeIdeas@skywagons.club>
Sent: Wed, Mar 14, 2018 12:02 am
Subject: re: 8 inch tires <<$192562650601$>>

View/reply online       Reply to forum at AirframeIdeas@skywagons.club       Reply directly to David Rabazzi at david.rabazzi@gmail.com
I ended up giving the Superhawk 8.50s a shot. I assume the shaved tires are recapped? From everything I've read the recaps are pretty reliable and have great durability but I'm a little nervous about them on a tailwheel plane (without much data behind that).

I'm going from 700s to 850s. Anyone worry much about alignment, toe in measurement after the change? The 700s were fairly well worn out the outside of the tire. I'm guessing going with a bigger tire will only make that worse. Any suggestions on where to get shims if need be?
 
 When new size tires are installed it is a good time to check alignment

On Tue, Mar 13, 2018 at 10:02 PM, David Rabazzi (david.rabazzi@gmail.com) <mailer@mail2.clubexpress.com> wrote:
View/reply online       Reply to forum at AirframeIdeas@skywagons.club       Reply directly to David Rabazzi at david.rabazzi@gmail.com
I ended up giving the Superhawk 8.50s a shot. I assume the shaved tires are recapped? From everything I've read the recaps are pretty reliable and have great durability but I'm a little nervous about them on a tailwheel plane (without much data behind that).

I'm going from 700s to 850s. Anyone worry much about alignment, toe in measurement after the change? The 700s were fairly well worn out the outside of the tire. I'm guessing going with a bigger tire will only make that worse. Any suggestions on where to get shims if need be?

 
Its not a recap. They will use a Goodyear Flight Special II.
As far as uneven wear, I had the same problem. My tires were wearing very fast on the outside. Doing an alignment solved the problem. Both tires were excessively toed in.
 
I ended up giving the Superhawk 8.50s a shot. I assume the shaved tires are recapped? From everything I've read the recaps are pretty reliable and have great durability but I'm a little nervous about them on a tailwheel plane (without much data behind that).

I'm going from 700s to 850s. Anyone worry much about alignment, toe in measurement after the change? The 700s were fairly well worn out the outside of the tire. I'm guessing going with a bigger tire will only make that worse. Any suggestions on where to get shims if need be?
 
I finally decided to go with a 800x6 Goodyear tire from Desser and they are going to shave them to remove the threads. They mentioned the 850x6 4 ply smooth tire but the load rating is only 1600 Lbs, my gross weight is 3200. This might cutting it close but I have no idea if this concern is justified. I wonder how long a 800 shaved tire will last, I think only 4/32 rubber is left after the shaving process? I guess this will be an experiment and I will see how they hold up.
 

So far the only people I know with Dessers on a Skywagon are those who have 180s with a max gross of 25 or 2650 and under. Mine is a 2800lb airplane. There's been debate about how squishy they get when operated on the heavier side. I'm leaning towards the goodyears or the superhawks. I've got a leading edge boot on the elevator to deal with the pebbles the grooves thrown up, so long as the don't get thrown forward. I'm also guessing those options will hold up to pavement a little better. Might make the Dessers my second set of 8.50s down the road...
 
David,

I think you’d be fine.  The load rating below is from their website.  Keep in mind the load rating is PER TIRE.  

To be 100% sure, I’d go weigh your airplane at gross and see how much weight is on each main.  

Mine weighed 1975 lbs with 38 gallons of gas on board and the weight was distributed about 870 pounds per tire.  

What is the tire pressure for these tires Aero Classic Smooth Tundra FAA TSO 850-6 4 ply tires?  
Load rating is 1600 lbs @ 20 psi. Max speed is 120 mph.

Paul Brown

On Feb 1, 2018, at 15:07 , David Rabazzi (david.rabazzi@gmail.com) <mailer@mail2.clubexpress.com> wrote:


Does anyone run the smooth 4-ply Dessers on later model 180s? Everyone I know with the Desser's has a 180 with a gross weight of 2550. I'm wondering if they might be a little too squishy to operate off pavement regularly for my H model (2800# gross). 

Another option is to run Goodyear smooth recaps. The drawback is they're roughly 20lb each. 

 
Jean-Pierre,

To be quiet honest, since you’ve indicated you don’t work your airplane hard, it’s simply a matter of personal preference.  I can’t stand to see my airplane on anything less than 8.50x10s.  I also prefer women with larger than A-cup breasts.  That’s just me.

If you’re on pavement or dirt either one will work just fine.  The taller 8.50 will provide more insurance if you hit a gopher hole.  Keep in mind it’s MUCH more expensive to install larger tires after the gearbox is ripped out.

No one makes any shaved tires other than Desser.  The Desser Aero Classics are also the only smooth tires.

Good luck.
Paul Brown



On Feb 1, 2018, at 20:46 , Jean-Pierre Held (n180v@icloud.com) <mailer@mail2.clubexpress.com> wrote:

Thank you for the great info. I am going to install the 199-62 kit. As far as tires are concerned I am still debating about the 8.00 or the 8.5 size. Its not much difference, only 1' in diameter. Is there really an advantage to have 8.5 vs 8.0? Does anyone make a shaved tire for the 6' wheel? I also would like to add that I am replacing the 8' tailwheel with 10' one from Landing Gear Works.

 
Thank you for the great info. I am going to install the 199-62 kit. As far as tires are concerned I am still debating about the 8.00 or the 8.5 size. Its not much difference, only 1' in diameter. Is there really an advantage to have 8.5 vs 8.0? Does anyone make a shaved tire for the 6' wheel? I also would like to add that I am replacing the 8' tailwheel with 10' one from Landing Gear Works.
 

Does anyone run the smooth 4-ply Dessers on later model 180s? Everyone I know with the Desser's has a 180 with a gross weight of 2550. I'm wondering if they might be a little too squishy to operate off pavement regularly for my H model (2800# gross). 

Another option is to run Goodyear smooth recaps. The drawback is they're roughly 20lb each. 
 
Yes - every tire mentioned in these emails with the exception of the 8.50x10 (10” diameter wheel) and 29x11x10 (10” wheel) are compatible with all 6” wheels. 

The 199-62 kit has a slightly offset brake caliper for running larger tires including Bushwheels.  It’s the gold standard for replacing the McCauley three piece wheels. I would personally recommend the ones from Alaska Bushwheel as they are all aluminum and great quality.

You have two options - 199-62 is the 3-bolt wheel and 199-62A is the six bolt wheel.  I’m guessing that since you’re on 6.00x6s you don’t use the airplane aggressively. If that’s so, the three piece wheel 199-62 would be fine. If you were working the airplane hard I’d recommend the six bolt. 



Desser also makes a smooth 8.00x6. Since the 8.00s are on your type certificate it would NOT require an STC. 

https://www.desser.com/Aircraft-Tires-and-Tubes/8.00-SC-6-PLY-AERO-CLASSIC-SMOOTH-AIRCRAFT-TIRE-AERO-CLASS.asp

As stated by the previous gentlemen, if you decide to go with the Desser 8.50x6s you’ll need the 8.50x6 STC which the club owns. This allows you to run 8.50x6 tires on the 6” wheels. 

This is what the Desser Aero Classic smooth 8.50x6s look like on a 180. 

image1.png

Paul Brown

Sent from my iPhone

On Jan 31, 2018, at 09:50, Jean-Pierre Held (n180v@icloud.com) <mailer@mail2.clubexpress.com> wrote:

I have never thought about the tire grooving trapping rocks allowing them to be slung out. Very good point. Now for the 8.5 x6 Desser tire, is it compatible with the Cleveland 199-62 kit? In the kit description it mentions only 8.0 size?
JP
 
I have never thought about the tire grooving trapping rocks allowing them to be slung out. Very good point. Now for the 8.5 x6 Desser tire, is it compatible with the Cleveland 199-62 kit? In the kit description it mentions only 8.0 size?
JP
 
Don’t forget the 8.50x10s or shaved 29x11x10s. Both are STCd but require a 10” wheel either via Schneider/Gar Aero adapters or one piece ABI wheels. 

I feel the 8.50x10 is the best overall tire for my use but unfortunately no one makes a smooth or shaved one to remove the grooves. Desser only makes a shaved 29x11x10. I’ve been unsuccessfully lobbying them to make a smooth 8.50x10 for the last six months. 

For your stated usage, I’d look hard at the new Desser 8.50x6 smoothie. Best combo. 


Paul Brown

Sent from my iPhone

On Jan 30, 2018, at 16:14, Derek N Priebe (dpriebe@priebeortho.com) <mailer@mail2.clubexpress.com> wrote:

For gravel and/or off-airport, 8.0 or 8.50s (STC) good, 26" Goodyears better (FA), 29" ABW (STC) best. The grooves in the tread are causing damage (they can even sling gravel into the prop), so select a tire without grooves; also consider abrasion boots on horizontal. You don't need 6 bolt wheels (although would recommend a 6 bolt for 29" ABWs)
Airspeed 6" to 8" ?    Nil
Regards,
Derek Priebe
Anchorage , AK
 
For gravel and/or off-airport, 8.0 or 8.50s (STC) good, 26" Goodyears better (FA), 29" ABW (STC) best. The grooves in the tread are causing damage (they can even sling gravel into the prop), so select a tire without grooves; also consider abrasion boots on horizontal. You don't need 6 bolt wheels (although would recommend a 6 bolt for 29" ABWs)
Airspeed 6" to 8" ?    Nil
Regards,
Derek Priebe
Anchorage , AK
 
I am debating about switching from 6' to 8' tires on my 180J.  I would have to change my Cleveland 199-60 to a 199-62 system which is not inexpensive. My flying profile is mostly paved but I am also going into gravel/dirt strip for fun here in New Mexico. I have had bad problems with rock damage on my horizontal stab which were in need of repair. I don't know if slightly bigger tires will make a difference? Do the rocks get projected by the tires or the prop wash? I have a three blade Hartzell prop. Is it an overkill to to go from 6 to 8 inch considering the expense? What impact would this have on airspeed. I appreciate any comment on this.
 
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