General > General Technical Chat
internal tire pressure sensor on a road bike
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BradC:

--- Quote from: tom66 on August 25, 2023, 04:48:18 pm ---This is how tyre pressure monitoring works in most European cars nowadays, with the exception of BMW and Mercedes who often fit run flats to their cars and so need to warn quicker of lower pressure due to the damage of running such a tyre low at high speeds.  I believe it's now a requirement for cars to include this function, even the basic Peugeot 108 I had for a couple of days had this function. 

--- End quote ---

Sorry, but no. The majority of cars with TPMS have sensors *inside* the wheel on the back of the valve and communicate with the vehicle using an unlicensed band (like in Aus they're commonly 433MHz).

Here's the specific unit for a Pug 108.
https://luxurywheel.com.au/shop/automate-oe-tyre-pressure-monitoring-sensors-tpms-peugeot-108-06-2014-12-2020-oe-part-no-4260702031-4260742020/
amyk:

--- Quote from: tszaboo on August 25, 2023, 02:21:27 pm ---
--- Quote from: Zero999 on August 24, 2023, 08:09:29 pm ---
--- Quote from: DiTBho on August 24, 2023, 12:07:15 pm ---
--- Quote from: mikeselectricstuff on August 24, 2023, 10:10:53 am ---Have you looked at automotive TPMS modules ?

--- End quote ---

thanks, good keyword to Google for  :D

--- End quote ---
Road bike tyres need to several times the pressure as car tyres.

--- End quote ---
I heard 4 BAR, that's what I use. A cyclist friend of mine said, you pump the tire until it blows up in your face and then you use the tire with just a little bit less pressure.
My car manual said 2.5 BAR.

--- End quote ---
100psi+ (~7 bar) is not uncommon for bus and truck tires, and there are TPMS available for those too; also the fact that hitting even a small bump at speed will cause a sudden spike in pressure that could be much higher than normal suggests that they are designed to handle far higher pressures than the tires themselves can survive.
PlainName:

--- Quote from: BradC on August 26, 2023, 01:12:49 am ---
--- Quote from: tom66 on August 25, 2023, 04:48:18 pm ---This is how tyre pressure monitoring works in most European cars nowadays, with the exception of BMW and Mercedes who often fit run flats to their cars and so need to warn quicker of lower pressure due to the damage of running such a tyre low at high speeds.  I believe it's now a requirement for cars to include this function, even the basic Peugeot 108 I had for a couple of days had this function. 

--- End quote ---

Sorry, but no. The majority of cars with TPMS have sensors *inside* the wheel on the back of the valve and communicate with the vehicle using an unlicensed band (like in Aus they're commonly 433MHz).

Here's the specific unit for a Pug 108.
https://luxurywheel.com.au/shop/automate-oe-tyre-pressure-monitoring-sensors-tpms-peugeot-108-06-2014-12-2020-oe-part-no-4260702031-4260742020/

--- End quote ---

Hate to correct you but according to Wikipedia that isn't (rather, won't be) the case:


--- Quote ---Since factory installation of TPMS became mandatory in November 2014 for all new passenger vehicles in the EU, various iTPMS have been type-approved according to UN Regulation R64. Examples for this are most of the VW group models, but also numerous Honda, Volvo, Opel, Ford, Mazda, PSA, FIAT and Renault models. iTPMS are quickly gaining market shares in the EU and are expected to become the dominating TPMS technology in the near future.
--- End quote ---
joeqsmith:
Took a couple of photos of the front and rear.  I would guess the bike is about 25 years old now.  Never put a lot of miles on it. Maybe 4-5000 before it became wall art.   

***
Looks like the photo upload is broke again so you got to see my scope instead of the front wheel.  I uploaded again and it seems to have corrected the linkage.   
DiTBho:

--- Quote from: joeqsmith on August 27, 2023, 03:22:27 pm ---I would guess the bike is about 25 years old now.  Never put a lot of miles on it. Maybe 4-5000 before it became wall art.   

--- End quote ---

Well, I bought a Speedwell Titalite made in 1985, pioner titanium frame with a lot of miles on its wheels and frame, so many miles that wheels arrived with dead rims and the fork is broken in several points, but this didn't stop me from looking for a new steal handworked novaCrMo(450g) fork and from rebuilding two 6-speed 28"/23 wheels with a 90s freewheel cassette that accepts up to six 8sp sprockets for a total 120mm Over Lock Nut, paired with a modified 7/8sp Rally3G derailleur and 8sp ErgoPower.

Masonry Steampunk art? no doubt about, but also a bloody killing machine to mock every modern carbon frame riders  :o :o :o

... and I have a similar evil plan for my steel-frame 90s bicycle, so ... be very careful  :D
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