Hey all,

Have a buddy getting rid of his older 235/85/16 mudders on his 2000 PSD dually. I have 265/75/16s on my PSD SRW rig.

How much and what is the difference in these tires? I hate the codes!

BTW, I am putting my road radials now on mine on another dually of mine I am selling.

Thanks, Digger

 

The 235/85R16's are 9.25" wide and 31.8" tall.
The 265/75R16's are 10.5" wide and 31.6" tall.

 

So the 265s probably wouldnt work on the dually, due to sidewall flex, but the 235s would be similar to mine, other than width.

I have heard many stories, what is the real deal with the numbers?

 

Take a 255/85R16 for example:

The first part (255) is the contact area width in millimeters. (The part that actually touches the road, which does not include the width of the sidewalls as they bulge.) In this case 255 mm which is about 10 inches.

The second part (85) is the sidewall height as a percentage of the contact area width. In this case 85% of 255mm which is 216.75mm or 8.5 inches.

The third part (R16) is the diameter of the wheel the tire was designed to fit on.

To get the tire height you just multiply the sidewall height by 2 and add the wheel diameter. (8.5" x 2) + 16" = 17"+16" = 33"

I know you didn't ask or care about it but since I am bored to tears at work, I'll throw in some useless stuff: How do you figure what number to put into the computer so that your speedometer is accurate?

You take the results from the (Sidewall Height x 2) + Wheel Diameter equation and you find the tire circumference. That formula is Tire Diameter or Height x Pi (3.14159) = circumference. For a 255/85R16 tire that would be 33" x 3.14159 = 103.67 or 103.67". Great, now the computer in your truck needs to know how many revolutions per mile the tires are making so we can take our tire circumference and plug it in the next equation:

Inches per mile / tire circumference = revolutions per mile.

There are 63360" in a mile so
63360" per mile /103.67" tire circumference = 611.17 revolutions per mile.

You have to fugure that the tire will loose some circumfenrence as is wears so you may want to figure to 1/2" less to even out the odometer reading, so you would put something like 614 revolutions per mile.

Now for mounting 265/75R16's on a dually, Michelin, for example, says you can mount their LTX M/S 265/75R16E's on a dually so it looks like it is entirely possible to do safely.

 

Wow,

THAT is knowledge.

Didnt know the 265s will work on the dually. May throw em in as a perk to the buddy that bought the dually.

Thanks for the help.

You a pilot?

 

Glad to be of help for a change.

I'm not a commercial pilot, just private. My wife's familly has a 1999 Beechcraft C90B in Alaska and my uncle has a 1978 Cessna 172N here in Texas.

 

Just a private myself, although working on the instrument slip. Wouldnt mind CFI, next year, would be nice on my off days from the firehouse.

Beech C90? Nice ride!

I have a 65 172F, but as soon as the new paint gets on, its for sale, hoping to move up to a Cherokee 6 or 210.

How much does your plane cost to keep in the air?

All of it, of course!

 

I don't fly the C90 a lot. Just when my wife's familly flies in for Christmas or during the summer sometimes. But it is a nice airplane. You know, I don't really know the cost of keeping either of these two birds up since neither belongs to me. My father is an aircraft mechanic (A&P/RE) so we don't pay for maintenance, just parts. My uncle keeps his airplane at the local airfield (2F7, Commerce, TX) so I'm sure he pays for the hangar and the fuel of course. 100 LL is $3.30 a gallon down here right now so it's about $130 per fill-up on the 172N. Jet-A is about $3.27 here. It takes about 390 gallons/2600 lbs to fill up the C90. It'll cruise for about 6 hours at around 200 kts and 25,000' with 2 people on board, so that's about 1200 miles. The C90B is kept in a hangar (metal pre-fab building really) on my in-laws property in Alaska on which they have 4500' x 65' asphalt runway. Nice setup. My uncle's plane (O-320) is about due for a overhaul so my father is going to get an STC to convert it to throttle body injection. No more carb heat, mixture and all that crap. We should be able to fly it more than 3 hours 31 minutes on a full tank. Right now it's drinking a quart and a half to 2 quarts of oil per 2 hour flight so it's starting to demand an overhaul. He also updated the radio to a King KX155A with glideslope so he now has the full 760 frequencies and it looks a bit more modern. Here's a view of Dallas from the 172N. At the time I took that picture, I had a 60,000" lift kit. (5000' through the Class B). My truck only has a 4" lift kit but bigger tires than the 172.



BTW, my F250 with the 5.4L/6-speed can tow both the 172 and the C90 very easily...

 

Wow, it is time for a OH, I am still about 700 away on an old 300. 1800TBO.
What a setup in Alaska, sounds way cool. What do they do up there?

Surprised they dont have a Maule or Cub or something too.

The FBO I work at is at 2.99 for 100LL, we are trying not to hit the magic 3.00 mark, but I think it is for naught. Have a buddy right outside of Paris, TX, I would love to take a couple weeks and go down, just to see it. Been there a few times by truck, but like you show the big D pic, it just doesnt get any better than the air...

I will have to figure out how to post pics on these pages...

 

My father-in-law works for an oil company he's a geological engineer. He did have a Cessna 414 (Chancellor, I think) and an Arctic Tern for a while.
$2.99 isn't bad. What part of the country are you in? I think when I started flying in 1993, it was between $2.20 and $2.30. It's really gone up.

To post pics, you'll have to go to USER CP at the top left hand of the screen, then go to EDIT GALLERY and then CREATE GALLERY. You can either just leave them in there or copy the FORUM CODES for the particular picture into your message.

 

I am outside Columbus, OH, in a little town called Pleasantville.
It has gone up, even just in the 2 1/2 years I have been flying.
I leased my 172 back to the FBO I work at, so it works really well for me. I make enough to rent the Arrow if I need it, but fly mine mostly for free.

 

I imagine flying in a un-airconditionned Cessna is a lot more pleasant in Pleasantville than down here. (No puns intended, but oh well.) In the summer, (June-October) who ever isn't taxiing the airplane gets to hold the door open with his/her leg to get some prop-wash in the cabin. (Except during run-up.) And afternoon-heating and lake-effect is ridiculously bumpy down here. We had to climb to 9000 feet to get any relief from it once. It may be 103 F on the ground and 120 F in the cabin with the door closed but at 9000', it's around 35-40 F. Natural A/C. It's also really dry, I can drink Dr Pepper after Dr Pepper and not have to "go" and I'm always thirsty. Hopefully someday, he'll trade the 172 on something with the luxury of A/C, either a Mooney Ovation (Made in Kerrville TX.) or a Socata Trinidad which is a nice one too.

 

N578MD,

Where is Alaska?? I was stationed there for 4 years (98-02) and flew C-130s out of Anchorage... It is a beautiful state and full of general aviation.

Now I'm in hot/muggy Arkansas...

Edmo

 

Got a good look at a Trinidad last weekend at our airshow. Nice, nice bird.

I cant imagine flying in TX in the heat. Its not too bad up here other than the humidity, we see 90 some of the time, but we only have to get up to 4-5000 to get out of the bumps.
On the flip side, when its 10 below it sucks. Battteries, oil, seats all get way way cold, usually about then I swear I am renting a hanger the next time I can get one.
I am looking to move up into a 206, maybe a 210 or Cherokee 6. Keep your eyes and ears open if you will...

 

Edmo, they live in the Anchorage area, near Knik. I'm sure you've overflown that area when on approach for 6. Lots of trees there, it kind of reminds me of East Texas. i thought it would be all pine trees but nope. Regular trees. I noticed the trees there because I almost became intimate with a bunch of them at the end of the runway. It's hard to stop on wet grass. (Reversible-pitch propellers? I didn't think to use them.) It was just a grass strip when you were there.

Man, Fordff, there are dozens of Stationairs for sale. Take a look:

http://www.aso.com/Single_Engine_Prop/Cessna_206.jsp