How does the TMPS work?

MrM83 · Dec 12th, 2022, 14:36

This cold snap as once again made me thing about all season tyres. I have a summer/winter set on my wifes BMW and frankly it’s a pain to store them and switch them. I previously had a Range Rover which had a snow terrain mode and handled all I needed it to in previous years on the standard summer tyres.

I might be doing my T8 a disservice but on the standard rubber it doesn’t generally feel as sure footed as my RR. It’s not a big problem for me, I do few miles but if I need to go somewhere I would like to have a little more confidence in poorer weather conditions.

Not wanting to pay some silly premium for the 275 width, there is a plethora of choices for all season tyres in 285 width and otherwise same fitment which I’m tempted to go for. So should I decide to change my tyres for all seasons, are there sensors on the wheel/valve that I need to be mindful of, or is the sensing done by measuring revolutions of the wheel, as I seem to recall reading (perhaps on this forum)?

Many thanks

nu11eaf · Dec 12th, 2022, 15:16

It helps if you add what model and year your T8 is but only very early cars had TPMS sensors in the wheels, from 2016 MY 2017 (in my XC90) there are no Sensors in the wheels and the TPMS detects a difference in tyre pressure (or rather tyre circumference) working off the anti lock brake system rings, if a tyre loses or indeed gains more than a few psi pressure from the set calibrated pressure the rolling distance is less or more and you get a warning. You calibrate the system yourself in settings when you alter the tyre pressure or change wheels etc.

Fibrous · Dec 12th, 2022, 15:16

Corrected from earlier as you have T8 (XC90 MY?)

Relevant link info -
https://www.volvocars.com/en-th/supp...itoring-system

Director76 · Dec 12th, 2022, 19:19

Just put a set of Michelin Cross Climate 2s on our T8, 5 years of driving 2x T8s and agree they’re not confidence inspiring in the snow. This is my first set of all seasons, ran a spare set of winters on previous Touaregs. TPMS reset fine and the tyres, so far, are great in the current weather conditions

Philip Fisher · Dec 12th, 2022, 20:30

Pre 2017 you need sensor valves on the second set - I bought a volvo set for 190 quid about 4 years ago. They are plug and play, no coding required.

Post 2017 you don't need anything.

MrM83 · Dec 12th, 2022, 21:28

Sorry, MY22 so assume should be straight forward then.

Dec 12th, 2022, 14:36	#1
MrM83 Member Last Online: Today 14:46 Join Date: Sep 2021 Location: St Albans	How does the TMPS work? This cold snap as once again made me thing about all season tyres. I have a summer/winter set on my wifes BMW and frankly it’s a pain to store them and switch them. I previously had a Range Rover which had a snow terrain mode and handled all I needed it to in previous years on the standard summer tyres. I might be doing my T8 a disservice but on the standard rubber it doesn’t generally feel as sure footed as my RR. It’s not a big problem for me, I do few miles but if I need to go somewhere I would like to have a little more confidence in poorer weather conditions. Not wanting to pay some silly premium for the 275 width, there is a plethora of choices for all season tyres in 285 width and otherwise same fitment which I’m tempted to go for. So should I decide to change my tyres for all seasons, are there sensors on the wheel/valve that I need to be mindful of, or is the sensing done by measuring revolutions of the wheel, as I seem to recall reading (perhaps on this forum)? Many thanks

Dec 12th, 2022, 15:16	#2
nu11eaf Premier Member Last Online: Today 00:50 Join Date: Mar 2013 Location: Yorkshire man living in County Durham	It helps if you add what model and year your T8 is but only very early cars had TPMS sensors in the wheels, from 2016 MY 2017 (in my XC90) there are no Sensors in the wheels and the TPMS detects a difference in tyre pressure (or rather tyre circumference) working off the anti lock brake system rings, if a tyre loses or indeed gains more than a few psi pressure from the set calibrated pressure the rolling distance is less or more and you get a warning. You calibrate the system yourself in settings when you alter the tyre pressure or change wheels etc. __________________ XC90 Inscription D5 Power pulse, 2017 MY, Savile grey, Blond Nappa, Leather dash/door tops, Walnut inlays, Dark tinted windows, Air suspension, Bliss/Cross traffic alert, Xenium/7 seat comfort/Family/Winter packs, 4 zone climate, Heated rear seats. Last edited by nu11eaf; Dec 12th, 2022 at 15:18.

Dec 12th, 2022, 15:16	#3
Fibrous Senior Member Last Online: Apr 23rd, 2024 09:41 Join Date: Nov 2021 Location: Edinburgh	Corrected from earlier as you have T8 (XC90 MY?) Relevant link info - https://www.volvocars.com/en-th/supp...itoring-system Last edited by Fibrous; Dec 12th, 2022 at 15:25.

Dec 12th, 2022, 19:19	#4
Director76 Master Member Last Online: Apr 16th, 2024 23:10 Join Date: Oct 2017 Location: Shrewsbury	Just put a set of Michelin Cross Climate 2s on our T8, 5 years of driving 2x T8s and agree they’re not confidence inspiring in the snow. This is my first set of all seasons, ran a spare set of winters on previous Touaregs. TPMS reset fine and the tyres, so far, are great in the current weather conditions __________________ ————————— MY21.5 XC90 T8 Recharge R-Design \|Bright Silver\|Lounge\|BLIS\|HK Tech\|Family\|Towbar\|

Dec 12th, 2022, 20:30	#5
Philip Fisher Premier Member Last Online: Today 12:26 Join Date: Dec 2002 Location: Sheffield	Pre 2017 you need sensor valves on the second set - I bought a volvo set for 190 quid about 4 years ago. They are plug and play, no coding required. Post 2017 you don't need anything. __________________ Currently:- MY16 XC90 T8 Momentum, Magic Blue 174k miles. MY17 V60 T4 Power Blue. Previously:- 1997 V70 T5 exPolice; 2005 V50 2.0D; 2013 XC70 D5

Dec 12th, 2022, 21:28	#6
MrM83 Member Last Online: Today 14:46 Join Date: Sep 2021 Location: St Albans	Sorry, MY22 so assume should be straight forward then.

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