Tire Out of Round

[Gary0747]

I have one year old Air Hawk tires on my mains. I have run Air Hawk tires for many years. They were formally made by Mcreary but now the company making them has a different name.  I have been experiencing a slight vibration right at take off that I do not remember having in the past. I have jacked each wheel to check for something loose or a bad bearing. I have found  nothing but have noticed what appears to be a slight out of rounding on one tire.  It is a quarter inch from high to low.  It does not appear to be a flat spot. I just wonder if tires can be made this much out of round or if perhaps a hard landing might distort the tire.  Perhaps I should start using a more expensive tire. Anybody with experience or advice? 

[RLCarter]

out of round or a flat spot?

 

[N201MKTurbo]

Mark the bulging spot and try to park it with that spot down and see if it straightens it our. 

If it works - great!

If it doesn't, well you hot what you paid for. My advice that is.

Edited March 26, 2018 by N201MKTurbo

[N201MKTurbo]

You might contact he tire company and see if hey will warranty it.  

[Hank]

This is why we balance the tires on our cars . . .

[Marcopolo]

@Gary0747,

 

  Take a look at the rim/bead area and make sure the tire is even all the way around.  With split rim installations the tires are not always forced on to the beads concentrically, leaving the the tire to appear slightly out of round. 

 

Just a thought.

Ron

[ArtVandelay]

If you have a GoPro or similar camera, you can video the tires, finding the bad one and checking for other problems like gear doors etc...

[Gary0747]

Are Goodyear Flight Custom or Michelins worth the extra money?  Primarily long trip flyer not a flight school.

[Raptor05121]

13 minutes ago, Gary0747 said:

Are Goodyear Flight Custom or Michelins worth the extra money?  Primarily long trip flyer not a flight school.

Going from Air Trainers to Flight Custom IIIs- Yes. Price per landing goes down, tires last longer, are much thicker and I think ride better. And that's coming from a CB.

[Mooneymite]

Apply brakes right after lift off to stop rotation.  It won't fix the problem, but it will mask it.

[ShuRugal]

Apply brakes right after lift off to stop rotation.  It won't fix the problem, but it will mask it.

I thought that to stop rotation, it works be more effective to apply brakes *before* takeoff...

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[Andy95W]

4 hours ago, Raptor05121 said:

Going from Air Trainers to Flight Custom IIIs- Yes. Price per landing goes down, tires last longer, are much thicker and I think ride better. And that's coming from a CB.

Didn't you get your tires for free, Alex?  Of course your price per landing went down! 

[Hank]

6 hours ago, Raptor05121 said:

Going from Air Trainers to Flight Custom IIIs- Yes. Price per landing goes down, tires last longer, are much thicker and I think ride better. And that's coming from a CB.

I use regular Flight Customs; don't see the benefit for the much higher cost of IIIs. From memory a few years back, the big difference besides price is a speed rating well above my gear down speed . . . .

[Sime]

I have just had 'Simex' brand tires fitted. They are a division of Continental Tires. My mains only cost me $50 each brand new.

The aircraft is still with the A&P for the annual, so I'll report back one how they are

 

Simex has been an aero tyre manufacturer in 1975, producing bias-ply aero tyres. They have been producing radial aero tyres since 2002, under the "Simex Aero" brand.
Simex is owned by Sime Darby, a huge Malaysian trading conglomerate, on a par with the big Japanese trading houses such as Mitsubishi, Mitsui, Sumitomo, Itochu and Marubeni.

Simex shut down their aero tyre business for a while in late 2001, stating poor trading conditions as a result of the impact of 9/11 on aircraft sales and parts sales.
Simex went into a technical partnership with Boeing for the supply of Simex-made radial tyres for the B777, in 2002.
Simex got their aircraft tyre technical assistance from Sumitomo Tyre. The Boeing deal made Simex only the 3rd radial aero tyre manufacturer in the world.

Continental have purchased a major shareholding in Simex, with the option to increase that shareholding to a majority if it so desires. Continental is the worlds 4th largest tyre manufacturer, behind the 3 "biggies" mentioned in my previous post. The Simex manufacturing facility is ISO9002 certified. Simex radial passenger and truck  tires are DOT (United States) and ECE (European Union) approved and compliant. Simex also carry out sizeable retreading operations, including aircraft tyre retreading.

BTW, Simex tires have absolutely nothing to do with my username! My name is Simon, and everybody calls me Sime.

Edited March 27, 2018 by Sime

[N201MKTurbo]

5 hours ago, Sime said:

I have just had 'Simex' brand tires fitted. They are a division of Continental Tires. My mains only cost me $50 each brand new.

The aircraft is still with the A&P for the annual, so I'll report back one how they are

 

Simex has been an aero tyre manufacturer in 1975, producing bias-ply aero tyres. They have been producing radial aero tyres since 2002, under the "Simex Aero" brand.
Simex is owned by Sime Darby, a huge Malaysian trading conglomerate, on a par with the big Japanese trading houses such as Mitsubishi, Mitsui, Sumitomo, Itochu and Marubeni.

Simex shut down their aero tyre business for a while in late 2001, stating poor trading conditions as a result of the impact of 9/11 on aircraft sales and parts sales.
Simex went into a technical partnership with Boeing for the supply of Simex-made radial tyres for the B777, in 2002.
Simex got their aircraft tyre technical assistance from Sumitomo Tyre. The Boeing deal made Simex only the 3rd radial aero tyre manufacturer in the world.

Continental have purchased a major shareholding in Simex, with the option to increase that shareholding to a majority if it so desires. Continental is the worlds 4th largest tyre manufacturer, behind the 3 "biggies" mentioned in my previous post. The Simex manufacturing facility is ISO9002 certified. Simex radial passenger and truck  tires are DOT (United States) and ECE (European Union) approved and compliant. Simex also carry out sizeable retreading operations, including aircraft tyre retreading.

BTW, Simex tires have absolutely nothing to do with my username! My name is Simon, and everybody calls me Sime.

Where did you buy Simex tires?

[Sime]

10 hours ago, N201MKTurbo said:

Where did you buy Simex tires?

I got them off an Ebay seller in Australia. His website is CLICK HERE. He does ship internationally too.

Keep in mind that he prices are in AUD$ and the USD$ is more powerful so you'll get them for less plus the shipping will be cheaper too.

[N201MKTurbo]

41 minutes ago, Sime said:

I got them off an Ebay seller in Australia. His website is CLICK HERE. He does ship internationally too.

Keep in mind that he prices are in AUD$ and the USD$ is more powerful so you'll get them for less plus the shipping will be cheaper too.

Thanks!

[Raptor05121]

On 3/27/2018 at 12:39 AM, Hank said:

I use regular Flight Customs; don't see the benefit for the much higher cost of IIIs. From memory a few years back, the big difference besides price is a speed rating well above my gear down speed . . . .

A factor for me was that the FCIIIs were the ones on all the review sites. I wonder if the IIIs are any thicker than the regulars?

[kortopates]

Significantly thicker, look for a review by Aviation Consumer on them.


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[Hank]

1 hour ago, Raptor05121 said:

A factor for me was that the FCIIIs were the ones on all the review sites. I wonder if the IIIs are any thicker than the regulars?

Higher speed ratings typically mean stronger sidewalls and different rubber compound.

[Gary0747]

I flew several take off and landings and the slight imbalance on lift off seemed to go away.  I just wonder if the cord and rubber in the tire tends to relax after being flexed some removing the out of round?  Perhaps some brands of tires have less of a tendancy to take an out of round profile or return to being round quicker.  

[bradp]

I seem to notice that my sidewalls were becoming oxidized and cracked faster than my treads were wearing. 

Also rotating main tires from side to side every annual or two is helpful for treat wear.

A couple of the moonies as the flying club have big "X"s on the mains- I imagine they are also out of round and are supposed to be parked not on the X.