Tyre Dog, tyre pressure and temp monitor not so good

[joel0407]

This is a question not a statement. I don't own one but I just made some observations from my mates on the GRR and I think he had far too much faith in the readings.

They have sensors that screw onto the valve stems that then wirelessly transmit the readings back to a hand held display that can be mounted in the cab.

The problem is I doubt the temp at the valve stem is going to be anywhere close to what the tyre temp is.

We let or tyres down. I went with 28psi in the front and 30psi in the rear. 28 was recommended front and back but I considered I was 2780kg I thought it better to keep a little more in the rear and then I limited my speed to 65 - 70km/h even when the going was good as I expected with the lower pressures the extra flexing in the tyres would create a bucket load more heat.

My mate on the other hand let his down to 35 in the front and 40 in the rear but then continued to let them down more and more because the pressures kept rising. I have no doubt the pressures were rising because the air was heating up and expanding but he was pretty trusting of his tyre dogs that wasn't showing much temp increase. He ended up with 30 in the front and 32 in the rear (or something close to that). He was still running at over 40 in the rear once they heated up. When the going was good he was happy to run up to 100km/h with those pressures thinking he was fine becasue the tyre dogs said the temp was still low.

The problem is the sensors are sitting out away from not only the rim but they are no where near the actual tread thats going to suffer from too much heat.

My tyres finshed the Gibb and then went all the way back to Darwin and barely look like they have been off the road at all. His threw knobs clean off the canvas which then leaked. He blamed there age and Coopers just being rubbish.

Happy Days.

[p38arover]

The sensors on mine are fitted inside the rims (at the valve stem location). I'd expect them to be more accurate at measuring temp than located where his are.

[Tombie]

They arent bad, but only measure AIR temperature..

Even the internals are only reading AIR temperature.

Ive got 2 sets - internal and external and both read close to one another in the 2 vehicles... Although I concede the externals are marginally lower.

As for pressures, yes, you may set them at XYZ, but running at speed they will increase as they heat up.

[Tote]

I have one that we bought for our Hay River and Simpson trip a couple of years ago. It saved me a tyre by telling me that it was punctured long before I would have noticed otherwise. Having said that the sensors on the valve stems wore the disco rims from moving around, I ended up gaffer taping them to the rim spoke to stop any more damage. The wear was only a problem on disco rims though, the sensors couldnt hit the rim on other vehicles on the trip. I don't use it much anymore and it has the advantage that I can leave it in the glove box unlike more permanent solutions. Tyre temperature is probably less relevent than pressure anyway. One interesting thing to note was how much the pressure would come up from cold to driving temperature. I was gaining around 8 PSI on some mornings.

Regards,

Tote

[joel0407]

The sensors on mine are fitted inside the rims (at the valve stem location). I'd expect them to be more accurate at measuring temp than located where his are.

Are they Tyre dog or another brand.

I like the concept of being able to monitor pressure and heat but I think the temp readings at the top of the vavle stem is next to useless.

I forgot to mention, he would see 10 degrees increase after he stopped.

Happy Days

[p38arover]

No, they were another brand I bought about 10 years ago, Joel. They were expensive at the time (there are much cheaper options now) but I fitted them after having lost air and destroyed a rear tyre on the freeway. I didn't even feel it. I heard the tyre making a noise but what the cause was didn't click until saw the smoke in the rear vision mirror (illuminated by the headlights of the car behind).

[BMKal]

I've been running the "Sensa Tyre" system supplied by Landybitz on this forum for quite a while now and have been very happy with the reliability and performance of this system.

You have the choice of sensor types - those that replace the valve stem or separate "strap-in" sensors that are held in position in the centre of the wheel rim by a stainless steel "band-it" type of strap. I have the strap-in sensors in mine.

You can get a basic 4 wheel monitoring kit - or the kit that I have is capable of monitoring up to 14 wheels (just need to purchase additional sensors).

I would happily recommend this system to anyone. See link below for details.

Safety (http://landybitz.com.au/safety)

[Tusker]

You not using them properly if you think they will give such accurate readings.

Set your tyres up the way you want, according to experience. What the transmitters say isn't relevant when cold.

It's the sudden or big changes in pressure/temp where they come into their own. You get warning of a deflating tyre or whatever.

I've got the stem type, quite happy. I was warned against the internal type, after changing a flat tyre you'll have the buzzer going nonstop, with no easy way of killing it.

There also invaluable for the modern ulta low profile tyres. I can't tell if my wife's Golf GTi is down, until about 12 psi.

Regards
Max P

[Disco Muppet]

Nugget on here ran a Tyre Dog and was disappointed with it's performance.
He replaced it with a different one and was suitably impressed, it's in his 110 build up thread :)

[joel0407]

Nugget on here ran a Tyre Dog and was disappointed with it's performance.
He replaced it with a different one and was suitably impressed, it's in his 110 build up thread :)

I searched Nugget on the members list and could only find 3 with 3, 5 and 7 post. None had a 110 build. Does he have a different user name?

Happy Days.

[steveG]

I searched Nugget on the members list and could only find 3 with 3, 5 and 7 post. None had a 110 build. Does he have a different user name?

Happy Days.

Here's his 130 build.
http://www.aulro.com/afvb/members-rides/183389-nuggets-defender-130-build.html

Steve

[BMKal]

You not using them properly if you think they will give such accurate readings.

Set your tyres up the way you want, according to experience. What the transmitters say isn't relevant when cold.

It's the sudden or big changes in pressure/temp where they come into their own. You get warning of a deflating tyre or whatever.

I've got the stem type, quite happy. I was warned against the internal type, after changing a flat tyre you'll have the buzzer going nonstop, with no easy way of killing it.

There also invaluable for the modern ulta low profile tyres. I can't tell if my wife's Golf GTi is down, until about 12 psi.

Regards
Max P

Tell whoever "warned" you that they don't know what they're talking about. ;)

If you get a flat tyre, the alarm stops going off as soon as you replace or re-inflate the tyre.

[Disco Muppet]

http://www.aulro.com/afvb/members-rides/116468-nugge-ts-110-defender-build-post1771299.html?highlight=tyre+dog#post1771299

There you go Joel :)

[Petetheprinta]

I've had a tyredog for about 5 years transferred from vehicle to vehicle. Never had a problem and it has saved me 3 tyres. I don't rely on the pressure reading as gospel, (although it's as accurate as most servos), just use is as an indicator of difference. Never bothered with the temperature side of things. I have recently put one on my wife's car so she can monitor her own tyres rather than rely on me to remember to check.

[joel0407]

http://www.aulro.com/afvb/members-rides/116468-nugge-ts-110-defender-build-post1771299.html?highlight=tyre+dog#post1771299

There you go Joel :)


Thanks mate

[Tusker]

Tell whoever "warned" you that they don't know what they're talking about. ;)

If you get a flat tyre, the alarm stops going off as soon as you replace or re-inflate the tyre.

Thanks, they must have updated the design since I looked into them. The internal type ruined a trip to the centre for a local club member with the constant buzzing.

Regards
Max p

[Sue]

Another vote for the Sensa system here (also bought through Landybitz on the forum).. although I was talking to Nugget two weeks ago and he was showing me his new system and I was suitably impressed. :)

[joel0407]

Thanks, they must have updated the design since I looked into them. The internal type ruined a trip to the centre for a local club member with the constant buzzing.

Regards
Max p

Couldn't have he just turned it off and still enjoyed the trip? Just saying.

Happy Days.