I have dual wheels and needed an 8 wheel one and by far the best one and easy to install was the one from Safety Dave, check out his site
I ordered on a Friday and received on the Monday, it came from melb. and I live in Brisbane

 

https://www.safetydave.com.au/safe-t-tyre-tyre-pressure-monitoring-system/

 

 

Good luck

Dave

-- Edited by Daveo85 on Saturday 10th of December 2016 10:14:07 AM

yes great for what I wanted

DAve

For the amount of money we all invest in our vans and tow tugs, it is worthwhile spending a bit more on some insurance. I have only been towing for 45 years, but in that time have had several blowouts on tandem boat trailers. I may not be the best driver, but I could not tell I had a flat until the damage was done. We spend a fair bit of time off road and I feel much safer with my TPMS as a slow leak on corrugations cannot be detected until it is too late.
There are several brands on the market around the $400 mark and all look OK. I had a Tyredog with internal sensors, but this was a pain as whenever tyres were rotated the unit had to be reset. The batteries went flat after 2 years so I have now changed to external sensors and these have not caused any problems so far.

I run a TPMS system (external caps) from digoptions. I watch my tyre temperatures against ambient temperature to make sure they are not running too high particularly when on the dirt with reduced type pressures, nothing kills tyre sidewalls faster than incorrect pressures and the temperature is a sure fire way of checking if you have reduced the pressures too much.
The cost is less than a new tyre let alone the inconvenience of changing it and finding a replacement of the the same size and make.
A slow leak is also easy to spot when the pressure change is in the negative, don't know why I still walk around the rig every morning and kick all the tyres when I have a readout to a fraction of a PSI but old habits die hard!

I installed a TPMS soon after buying my Big Rig (Chevy Silverado and Forest River van). I have 8 wheels to monitor and the system was always unreliable. Usually at random, one of the van wheels would not display. What was annoying was that this was inconsistent, sometimes all whells would be on the display, then one would drop off, sometimes two wheels.

During our last big trip of 7000km from Vic to Qld and back, a tyre on the van exploded and without warning from the TPMS because it was that wheel that was not displayed.

When I got home I returned the unit to the seller in person and wouldn't you know it, they knew about the problem. The guy handed me a wireless dongle that hangs somewhere near the rear of the truck and gives the necessary communication link between the van wheels and the monitor. I needed to add a cigar lighter fitting for the 12v power in the tub, but was happy to do so.

From van wheels to monitor is about 10m with my rig, so its a fair distance the system has to link across in signal-busy environments such as on the road, but the system is supposed to be OK up to at least 15m and more.

So far, with the new dongle running I haven't had any dropouts. It is certainly something to know about when buying these things.

I am certain that if the TPMS had been working properly at the time, the tyre blowout would not have happened because I would have been alerted to a the pressure/temp raising.

When I was ordering them they advised me to get a booster which they gave me as part of the package and I have it running in the back of the 4x4

not had an issue. Yes you are right if you over 10mt long best to have a booster and I am near 14mt so was good of them to let me know about the booster

 

Dave

-- Edited by Daveo85 on Monday 12th of December 2016 07:13:56 AM