Tyre pressure monitors?

Post by **sirch345** » Thu Jun 07, 2007 11:16 am

Do I remember someone saying that these little tyre pressure monitors are NOT a good idea to fit on a standard rubber valve

Anyone already using them?

http://www.tyrepressuremonitors.biz/index2.htm

grinner · Post by **grinner** » Thu Jun 07, 2007 1:58 pm

Don't do it! They can (at speed of course) cause rapid air loss because of the additional weight on the valve. Same as leaving the 90 degree valve extensions on.
Just carry a pen gauge or similar.

LotusSevenMan · Post by **LotusSevenMan** » Fri Jun 08, 2007 8:27 am

Aha. They were on my last bike (they came with them fitted) so I've now found yet another excuse for my 'excursion' off at the roundabout at the excessive speed of, twenty five to thirty miles an hour!
The only thing I have heard against them is that they aren't as sensitive for bike use as we'd like but suit normal cars better (but my Caterham 7 notices a two pound change in the handling characteristics.......... but then it runs at 16psi front and 18 rear!)

http://www.dunlopmotorcycle.com/fitmentguide.asp

tiggerii · Post by **tiggerii** » Sat Jun 09, 2007 8:02 am

Alternatively have your tyres filled with nitrogen, my front tyre pressure hasn't dropped in over a year now. The rear would of been the same if I didn't keep wearing them out!

LotusSevenMan · Post by **LotusSevenMan** » Sat Jun 09, 2007 8:21 am

Tiggerii

When I lived in Chandlers Ford before the ex Mrs 'robbed' me of my house (Sycamore Avenue) nitrogen wasn't available at Parade Service Station. This is where now the area has houses I believe!

Think it is a lot more stable under heating up/cooling down circustances so no changes in pressure but didn't think it was any better or worse than air for leakage.

Post by **sirch345** » Sat Jun 09, 2007 3:33 pm

Thanks guys for your replies.
I definitely won't be using them

I think Grinner's reply was similar to what I thought someone once said

(it may have been Stratman) My memory must be better than I realised

tiggerii · Post by **tiggerii** » Sun Jun 10, 2007 4:24 pm

LSM

It appears to be much better for leakage, something to do with nitrogen molecules being larger on something. I'm no chemical expert but I do know that since having the nitrogen done (Micheldever Tyres) my pressures have been stable. I've been so pleased with it that I've also had my XC90 and Saab Aero done and they also don't need tyre pressure maintenance anymore.

LotusSevenMan · Post by **LotusSevenMan** » Sun Jun 10, 2007 5:23 pm

Micheldever did a good job for me too when fitting new rears and sorting the tracking on my Lotus Esprit S3. Good outfit are MT. Took lots of time to 'get it right' with no additional costs!!!!