Tyres, Brakes and Suspension » TPS Alert Settings

I am getting low tire pressure alerts whenever my rear tire pressure reads 31 psi or lower. This is troubling because I like to go down to 32 front and 28 rear when I am going to be riding and cornering hard. I ran at the lower pressures with no issues of alerts in the past, but now I have been getting the alerts for the past couple of months. Is it possible that the dealership did some sort of update that adjusted the alert ranges at my last service? Has anyone had a similar change in their pressure alerts happen? And am I correct in believing that there is no way to adjust the alert levels either directly on the bike or by using a GS-911 tool?

According to the manual you can just turn the warning off

RDC.JPG - Bild entfernt (keine Rechte)

Zitat von BusBoy11 im Beitrag #1

---

... I like to go down to 32 front and 28 rear when I am going to be riding and cornering hard ...

---

Zitat von trudd im Beitrag #2

---

According to the manual you can just turn the warning off

---

Yes, that's the 1250 manual.

Zitat von Ray im Beitrag #3

---

Zitat von BusBoy11 im Beitrag #1

---

... I like to go down to 32 front and 28 rear when I am going to be riding and cornering hard ...

---

Wow! You run the rear at 28 when the recommended is 42. What that a typo in your post?

---

I've just checked my pdf, downloaded from bmw, files available for all models.
One for 2015 and then 2016 and both, around page 112/114 show all the usual tyre pressure setting and compensation advice when comparing tpm to a garage air pump.
Nowhere is the any 'ignore/lower/cancel option' so I guess this is a R1250 update?

Hope this helps?

Tyre pressure
monitoring (RDC)
with tyre pressure monitoring
(RDC)OE
Function
A sensor integrated into each
tyre measures the air temperature and the air pressure inside
the tyre and transmits this information to the control unit.
Each sensor has a centrifugalforce tripswitch that does not
enable transmission of the measured values until the motorcycle
has exceeded a defined minimum
speed for the first time.
Minimum speed for
transmission of the RDC
measured values:
min 30 km/h
The display shows ­­ for each
tyre until the tyre-pressure signal
is received for the first time. The
7
112
z Engineering details
sensors continue to transmit the
measured-value signals for some
time after the vehicle comes to a
stop.
Time for transmission of
measured values after
vehicle comes to a stop:
min 15 min
An error message is issued if
wheels without sensors are fitted to a vehicle equipped with an
RDC control unit.
Tyre-pressure ranges
The RDC control unit differentiates between three tyre-pressure
ranges, all of which are parameterised for the motorcycle:
Tyre pressure within permitted
tolerance.
Tyre pressure close to limit of
permitted tolerance.
Tyre pressure outside permitted tolerance.
Temperature
compensation
Tyre pressure is a temperaturesensitive variable: pressure increases as tyre temperature rises
and decreases as tyre temperature drops. Tyre temperature
depends on ambient temperature
as well as on the style of riding
and the duration of the ride.
The tyre-pressure readings in the multifunction
display are temperature-compensated and are always referenced to the following tyre-air
temperature:
20 °C
The air lines available to the public in petrol stations and motorway service areas have gauges
that do not compensate for temperature; the reading shown by
a gauge of this nature is the
temperature-dependent tyre
pressure. In most instances,
therefore, these gauge readings will not tally with the pressures shown by the multifunction
display.
Pressure adaptation
Compare the RDC value on the
multifunction display with the
value in the table on the back
cover of the Rider's Manual.
Then use the air-line gauge at a
service station to compensate
for the difference between the
RDC reading and the value in the
table.
7
113
z Engineering details
Example
According to the Rider's
Manual, the tyre pressure
should be:
2.5 bar
The multifunction display
shows the following reading:
2.3 bar
So pressure is low by:
0.2 bar
The gauge on the air line
shows:
2.4 bar
You must now increase tyre
pressure until the value is:
2.6 bar

Zitat von Dave H im Beitrag #7

---

I've just checked my pdf, downloaded from bmw, files available for all models.
One for 2015 and then 2016 and both, around page 112/114 show all the usual tyre pressure setting and compensation advice when comparing tpm to a garage air pump.
Nowhere is the any 'ignore/lower/cancel option' so I guess this is a R1250 update?

---

Zitat von Dave H im Beitrag #8

---

Hope this helps?

Tyre pressure
monitoring (RDC)
with tyre pressure monitoring
(RDC)OE
Function
A sensor integrated into each
tyre measures the air temperature and the air pressure inside
the tyre and transmits this information to the control unit.
Each sensor has a centrifugalforce tripswitch that does not
enable transmission of the measured values until the motorcycle
has exceeded a defined minimum
speed for the first time.
Minimum speed for
transmission of the RDC
measured values:
min 30 km/h
The display shows ­­ for each
tyre until the tyre-pressure signal
is received for the first time. The
7
112
z Engineering details
sensors continue to transmit the
measured-value signals for some
time after the vehicle comes to a
stop.
Time for transmission of
measured values after
vehicle comes to a stop:
min 15 min
An error message is issued if
wheels without sensors are fitted to a vehicle equipped with an
RDC control unit.
Tyre-pressure ranges
The RDC control unit differentiates between three tyre-pressure
ranges, all of which are parameterised for the motorcycle:
Tyre pressure within permitted
tolerance.
Tyre pressure close to limit of
permitted tolerance.
Tyre pressure outside permitted tolerance.
Temperature
compensation
Tyre pressure is a temperaturesensitive variable: pressure increases as tyre temperature rises
and decreases as tyre temperature drops. Tyre temperature
depends on ambient temperature
as well as on the style of riding
and the duration of the ride.
The tyre-pressure readings in the multifunction
display are temperature-compensated and are always referenced to the following tyre-air
temperature:
20 °C
The air lines available to the public in petrol stations and motorway service areas have gauges
that do not compensate for temperature; the reading shown by
a gauge of this nature is the
temperature-dependent tyre
pressure. In most instances,
therefore, these gauge readings will not tally with the pressures shown by the multifunction
display.
Pressure adaptation
Compare the RDC value on the
multifunction display with the
value in the table on the back
cover of the Rider's Manual.
Then use the air-line gauge at a
service station to compensate
for the difference between the
RDC reading and the value in the
table.
7
113
z Engineering details
Example
According to the Rider's
Manual, the tyre pressure
should be:
2.5 bar
The multifunction display
shows the following reading:
2.3 bar
So pressure is low by:
0.2 bar
The gauge on the air line
shows:
2.4 bar
You must now increase tyre
pressure until the value is:
2.6 bar

---

Zitat von Ray im Beitrag #3

---

Wow! You run the rear at 28 when the recommended is 42.

---

Can think of no good reason to run such low pressures on the road. No way will the tyres get to the running temperatures required to compensate for lack of grip due to overheating. The characteristics of the bike just don't fit with it either, other parts of the running kit ( brakes, suspension) plus cylinder heads and harsdware would be finding their limits way before the drop in pressure became an advantage - especially if running stock approved tyres. Best of luck with that - try and keep it right side up

Zitat von andygriff im Beitrag #12

---

Can think of no good reason to run such low pressures on the road. No way will the tyres get to the running temperatures required to compensate for lack of grip due to overheating. The characteristics of the bike just don't fit with it either, other parts of the running kit ( brakes, suspension) plus cylinder heads and harsdware would be finding their limits way before the drop in pressure became an advantage - especially if running stock approved tyres. Best of luck with that - try and keep it right side up

---