Run Flat with normal tyres !

[Tymatk]

Hi

My car doesn't come with Tyre monitor sensors, does this mean i can't run Run Flat tyre?

Also can i run 2 of the same brand Run Flat tire at the front and 2 standard tire at the back?

Thanks

[rogerkiu]

If you do not equipped with TPM but use RFT, you will not notice you have a flat tyre. That will be extremely dangerous! Not recommended at all. Different type of tyres between front and rear is not recommended either.

[Tymatk]

.... Will i feel the steering wheel pull to 1 side like normal tyre with RFT or i will not be able to feel this at all?

[pnoyako85]

Originally Posted by Tymatk

Hi

My car doesn't come with Tyre monitor sensors, does this mean i can't run Run Flat tyre?

Also can i run 2 of the same brand Run Flat tire at the front and 2 standard tire at the back?

Thanks

What year of X5 do you have.......

i have an 06...no tpm monitor on the tire or rim...they have it on the abs or shocks i believe ........

[rogerkiu]

No matter what kind of TPM (sensors on rim or by ABS sensors) you have, if you want to use RFT, you'd better have one kind of TPM equipped on your car. Otherwise, it will be very dangerous when you have flat tyre because you will not easily notice it. If you use the same type of tyres on front axle, it should not feel steering pulling on one side.

[TwinTurboGTR]

I concur. If you do not have some type of monitoring system; using run flats are dangerous. They will get you by in an emergency situation for approx 40 to 50 miles. If it is not caught, you risk a blow out. Also, I don't like run flats because they are noisier, wear quicker, and are more expensive.

Why do you want to run RFT's anyways if you don't mind me asking?

[motordavid]

Dunno...the anxiety level is pretty high, imo.

The TPMS for that year that "pnoayako85" references is 'indirect' I believe: a sensor at each wheel measures rotational wheel speed and rolling diameter.

As for running RFTs with no 'alert' TPMS system: I think the hand wringing is overblown.
I have had a flat with RFTs, and while my direct sensor psi readout on our Vette alerted me, one would had to have been in a coma not to freakin notice that something was amiss with one of the tires.

A daily/pre trip glance at the tire, checking psi, etc. and I think one could run RFTs, but no one knows what the OP's driving situs will be...it's not like one is doing miles of 140+ on a banked oval.
GL, mD

Edit, fwiw...here is Tire Rack's pitch/reasoning for recommending not to use RFTs on a non-TPMS system, (similar to other tire joints's rec'd):

"Why can’t I use run-flat tires without a Tire Pressure Monitoring System (TPMS)?

Because run-flat tires are so good at masking the traditional loss-of-air symptoms that accompany a flat tire, they require a tire pressure monitoring system to alert the driver that they have lost air pressure. Without such a system, the driver (even an experienced driver) may not notice underinflation and may inadvertently cause additional tire damage by failing to inflate or repair the tire at the first opportunity."

While I don't disagree, and am not pitching the OP on using RFTs on a non-TPM system, the logic is shady at best. Most RFTs are gonna be toast even with a warning, after 10, 30, or 'the max rec'd" 50 miles.

Do I want Buffy driving her mini van or X using RFTs on a non TPM system? No. She is busy doing BT, texting, kids screaming, watching NAV TV, etc. and will never notice whether she/he has four wheels on the car.

Would I buy RFTs for a non-TPM system? No...RFTs tend to cost a lot more than non-RFTs of comparable or better quality. Back to snooze.

[Tymatk]

Roger!

Ok so my next question is can i install TMS on my X5? What's the chance for the hardware and harness are already there? Fat chance i guess?

[Tymatk]

Originally Posted by rogerkiu

No matter what kind of TPM (sensors on rim or by ABS sensors) you have, if you want to use RFT, you'd better have one kind of TPM equipped on your car. Otherwise, it will be very dangerous when you have flat tyre because you will not easily notice it. If you use the same type of tyres on front axle, it should not feel steering pulling on one side.

So you're saying with RTF tire, when it's flat or loose pressure, i wont' feel it on the steering wheel like normal tire does ??