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Old 02-17-2017, 11:00 AM   #1
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TPMS

Does anyone out there use tire pressure monitoring systems on their A Frames? I have been looking at them and wondering what your thoughts were. Thanks.
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Old 02-17-2017, 11:11 AM   #2
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This is the most popular system on this forum.....I think on any type of trailer it is worthwhile to have....

TPMS TST 507

https://www.google.ca/search?q=tst+5...I4TBjwSLi534Aw
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Old 02-17-2017, 02:01 PM   #3
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It's worthwhile any time you're towing. Especially so on a single axle trailer since you lose the redundancy of an extra wheel on either side.

http://learntorv.com/how-and-why-to-...tire-pressure/
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Old 02-18-2017, 10:52 AM   #4
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Sounds like a good idea, but will our small alloy A-frame wheels accept metal valve stems?
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Old 02-18-2017, 10:57 AM   #5
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Good question. I didn't think of that.
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Old 02-18-2017, 11:10 AM   #6
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Quote:
Originally Posted by Swampweasel View Post
Sounds like a good idea, but will our small alloy A-frame wheels accept metal valve stems?
Don't see why not? The valve stems are not a special fit. You have valve stems now so you should be able to replace them with metal valve stems...

Call the tire company you use and find out before you buy the monitor...
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Old 02-18-2017, 11:28 AM   #7
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My car wheels have a machined recess for where the washer and nut seat on a metal valve stem. The A-frame wheels are kind of rounded in that area and don't have the machined recess. At least mine don't. That is why I asked. Anybody on here have an A-frame and using metal valve stems?
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Old 02-18-2017, 07:33 PM   #8
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Yes I use the tst 507 and it works good. The huge damage a flat tire can cause to your trailer and not to mention a bad camping trip. I don't want to take the chances
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Old 02-18-2017, 08:01 PM   #9
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I do not use a TPMS on my A-frame. I'm not sure it's worth the money, and then there are the issues of sensor installation on the A-frame wheels and the readout in our minivan. I still have the stock wheels and rubber valve stems on the A-frame.

I have weighed my A122 in camping condition, and it came in at 2,740 lbs. I could push that up to about 2,900 lbs with a full water tank (it tows better with the water tank full). With the gross weight of 3,100 lbs, and tire capacity of 3,420 lbs, I believe I have enough margin that I'm not likely to have tire problems.

I do check tire pressures before every trip, and set the pressure at 65-68 PSI, depending on where I'm going from our current altitude of 6,800ft. Tires have about 10,000 miles on them now, and are still in good shape. I may replace them this year with the new Carlisles to get an upgrade in maximum speed from 65MPH.

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Old 02-18-2017, 10:47 PM   #10
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IMO, it's probably not worth it on a light A-frame trailer. If the factory put cheap, off-brand tires on it, I'd spend my money on replacing them with a good set of Carlisle or Maxxis M8008 tires before I bought a TPMS. (Don't forget to replace the spare as well.) Most people with popups don't have a TPMS. It certainly won't hurt; I just don't think it's of great value on an A-frame.
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Old 02-18-2017, 11:10 PM   #11
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I installed TPMs on my TT late last year using the rubber tire stems. As you can see in the picture, that was a bad idea as they were rubbing the wheels. I have since removed them. I spoke to a fellow at a tire shop and he thinks short flush mount metal stems with the nuts on the inside may work but he said he needs to break a tire down is see for sure. I plan on doing that next month. Larry G.
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Old 02-18-2017, 11:27 PM   #12
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We use the TST 507 on our TT. After having 5 blowouts [tread seperations], three on one 450 mile trip, there is no way I would leave the driveway without the system. Did I mention $3,600 damage to the underbelly, gas line, water line and wiring harness?
It's good to know what your pressure is before each trip, but knowing what is going on [temp, pressure, trending leak] IN REAL TIME is invaluable.
Even if you just checked your pressures and temps at a fuel stop, and run over a curb, a piece of glass, nail, etc. on the way out, without the TPMS, the first you will know you have a problem is when you see rubber flying in your rear view mirror or another car signals you. Too late by then. Cheap insurance! You are betting your life and your family's.
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Old 02-19-2017, 12:38 AM   #13
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We use an $80 TPMS setup on our single axle Pup. Gets the job done for us.


https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
I put the 'front' sensors on my van rear wheels and the 'rear' sensors on the trailer.


These do OK on rubber stems. Read the comments before you buy - they have a 26' range, it often takes a while on the road before they all come to life, the display is hard to read in the sunlight (but a low pressure or high temp alarm is easy to hear), the unit doesn't shut off with the key and I often get an alarm when I get on the road after a rest or overnight stop (but turning the unit off and back on remedies that). I'm right at 26' from the axle to the dash which doesn't seem to be a problem. Worst case I could plug the display into the rear seat socket and get 15' closer, which is what I may have to do when I take the boat out next time.


but even if I have to buy a repeater I'll still be way under the cost of the 507.
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Old 02-23-2017, 04:44 PM   #14
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I decided to do this. Our last two trips have been through the Appalachian and Smoky mountains and I did stop more than once to check wheel temperature. I'm not real comfortable with the electric breaks as yet.

I went with the TST 507 with the cap valves rather than the flow through. I took the anti theft ring off so I could inflate without having to use the tool that comes with them. The setup was pretty straight forward thanks to the seller's great video. And I see no issues with the sensors hitting the rims.

I got them from TecnoRV: TST RV Tire Pressure Monitors

Good price, free/quick delivery and support. I emailed a question Sunday afternoon and had an answer Sunday night.

I haven't towed with them yet (16 days to go, but who's counting?), I'll give an update next month.
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Old 02-23-2017, 05:19 PM   #15
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I have the TST507 and had the earlier version. I have been using TST for over 12 yrs and could not be happier. The problem with not just weight, but any loss of a tire will do considerable damage if not detected immediately. Prior to using the TST, I was continually looking in the mirror to check tires. Now I turn TST on and enjoy the trip knowing the monitor is checking on them. My vote is YES.
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Old 02-23-2017, 05:29 PM   #16
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You might as well remove the locking rings. If they get just a little dirt on them (it will) then the lock ring will freeze up. When it does that you can easily remove the sensor without unlocking it.
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Old 02-23-2017, 05:32 PM   #17
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TST 507 Non-Flow Through Sensors on rubber stems, 11500 miles no issues.


Now watch a stem fly off on my next move...
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Old 02-23-2017, 06:42 PM   #18
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Tst 507 rv

The TST 507RV can be used with rubber valve stems, but the valve stems
can only be so long.

www.vulcantire.com has a good price, free shipping, plus 2 extra years of warranty free.
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Old 02-23-2017, 11:16 PM   #19
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I just bought the Tireminder tm-55c-b for mine. I will see how it works. I didnt buy the booster yet. My TT is only 22 ft. Hopefully it will work ok. Amazon has the kit. It monitors 5 positions for $115. You have to buy the 5th sensor seperately if you want to monitor the spare with a dual axle.
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