The Green Industry's Resource Center

SouthSide Cutter · #41 10-18-2012, 08:53 PM

The thing about nitrogen is it has no moisture in it. We use it in the Power Plants to blanket anything we drain like the boilers and also all of our transformers have a nitrogen blanket on them as well for the swell of the oil in them.
Back to the tire using nitrogen. All air is not equal. Some of you may have more moisture in your air because of no wtr filter or spitters. So the more moisture in the tire or air the more trouble with the psi drop or gain. Always ran nitrogen in my slicks drag racing just run 7lbs and it was alot eaiser to keep it there. We also put a bottle of Dawn dish washing soap in each tire. You just poured it in wriped it around with a rag and let it dry in the sun. Kinda put a wax film inside the tire. If you didnt do this they were hard to keep air in doing the week when not racing. Done this on all my tubeless lawn tires also with great results.

watsmi57 · #42 10-19-2012, 06:48 AM

I run 12 in the back and 10 in the front tires. I have realized that I can notice even a subtle change in my tire pressure based on how it cuts. Looked a little uneven the other day and sure enough I was down a couple lbs on one side. I try to check my tires once a month, but being as I have almost 30 tires to maintain it doesn't always get done lol. I have noticed however that anytime there is a sudden temp change (hot to cold or cold to hot) it fluctuates. I always try to check them as the seasons are changing. Also anytime a large storm rolls thru (chunk of low pressure). Especially a hurricane or tropical storm. You can bet your tire pressure needs to be checked.

puppypaws · #43 10-19-2012, 07:32 AM

Quote:

Originally Posted by watsmi57

I run 12 in the back and 10 in the front tires. I have realized that I can notice even a subtle change in my tire pressure based on how it cuts. Looked a little uneven the other day and sure enough I was down a couple lbs on one side. I try to check my tires once a month, but being as I have almost 30 tires to maintain it doesn't always get done lol. I have noticed however that anytime there is a sudden temp change (hot to cold or cold to hot) it fluctuates. I always try to check them as the seasons are changing. Also anytime a large storm rolls thru (chunk of low pressure). Especially a hurricane or tropical storm. You can bet your tire pressure needs to be checked.

You are running a very respectable tire pressure for ride comfort, a 10/8 will give even a much better ride than the 12/10. I've found it to be amazing what a couple pounds of tire pressure can do for ride. Like you said, I can very easily see two pounds difference in air pressure from the cut, but I can feel it in the ride as well.

Ridin' Green · #44 10-19-2012, 02:08 PM

Quote:

Originally Posted by puppypaws

You are running a very respectable tire pressure for ride comfort, a 10/8 will give even a much better ride than the 12/10. I've found it to be amazing what a couple pounds of tire pressure can do for ride. Like you said, I can very easily see two pounds difference in air pressure from the cut, but I can feel it in the ride as well.

I know you'll probably think I'm just trying to argue with you, but that's not the case. As I said at the beginning of this thread my tires were at 8 and I aired them back up to 12 where I normally run them. I went right back out and ran over the same piece of ground and in the same tracks I was just cutting while they were at 8. They definitely ride better at 12. Since I didn't get to watch the side walls of the tires in slow motion, I have to assume that the tires are just flexing too much at 8 PSI to give the best ride.

A lot of the ride/pressure relationship has to so with the machines weight, rim width, tire brand etc. You just have to find that sweet spot for your own machine.

puppypaws · #45 10-19-2012, 07:54 PM

Quote:

Originally Posted by Ridin' Green

I know you'll probably think I'm just trying to argue with you, but that's not the case. As I said at the beginning of this thread my tires were at 8 and I aired them back up to 12 where I normally run them. I went right back out and ran over the same piece of ground and in the same tracks I was just cutting while they were at 8. They definitely ride better at 12. Since I didn't get to watch the side walls of the tires in slow motion, I have to assume that the tires are just flexing too much at 8 PSI to give the best ride.

A lot of the ride/pressure relationship has to so with the machines weight, rim width, tire brand etc. You just have to find that sweet spot for your own machine.

I've always run 10/8 in my Super Z mowers to get the best ride, I've personally found there is more front end bounce if moving to 10 lbs. in the front tires, can't really tell a great deal of difference in 10 or 12 in the back.

The new 72" Super Z I just bought rides very good, and I have 10 in the rear, and the run flat tires on the front. I honestly would have bet there was no way the run flat tires could ride anywhere close to air filled tires, and was totally shocked when finding they rode just as well. I guess it is the softness that allows them to absorb shock far better than I would have believed. There is one thing I'm not crazy about (is probably caused by the softness that makes them ride better), and it does not matter if you only leave it sitting on concrete for one hour, there is a flat spot memory built up, and when you first start driving the mower you get that bump, bump, bump each time it hits the flat spot, but one good thing, it does not take them long at all to round out.