can I replace my Extended Mobility tires with regular tires? What about the spare?
Thread Starter
Junior Member
Joined: Nov 2013
Posts: 22
Likes: 2
From: Ithaca, NY
2010 C300, 2015 GLK350
can I replace my Extended Mobility tires with regular tires? What about the spare?
I have a 2015 GLK 350 that came with extended mobility tires and no spare. I am tired of the tires (no pun intended). Can I just replace them with regular tires and buy a spare? will the spare fit in the cargo space?
Super Member
Joined: Dec 2015
Posts: 812
Likes: 86
From: Springboro, OH
16 GLC 19 Volvo XC40 06Corvette Z06
A disadvantage is there are no provisions to properly stow the spare as it most likely will not fit in the stowage compartment behind the rear seats. In the event of a panic stop or roll over accident its likely the tire will be rocketing around inside the vehicle.
What don't you like about your run flats?
Do a search. There have many owners who have done the same thing your contemplating. Lots of good info.
Last edited by larrypmyers; Jan 23, 2019 at 12:21 PM.
Thread Starter
Junior Member
Joined: Nov 2013
Posts: 22
Likes: 2
From: Ithaca, NY
2010 C300, 2015 GLK350
No problem fitting your GLK with conventional tires. You will, however, need to acquire a jack and lug wrench. And if you opt for a compact spare, which most everyone does, you will also need peculiar lug nuts that fit the spare wheel. And remember the spare has the same speed and distance limitations as a zero pressure run flat.
A disadvantage is there are no provisions to properly stow the spare as it most likely will not fit in the stowage compartment behind the rear seats. In the event of a panic stop or roll over accident its likely the tire will be rocketing around inside the vehicle.
What don't you like about your run flats?
Do a search. There have many owners who have done the same thing your contemplating. Lots of good info.
A disadvantage is there are no provisions to properly stow the spare as it most likely will not fit in the stowage compartment behind the rear seats. In the event of a panic stop or roll over accident its likely the tire will be rocketing around inside the vehicle.
What don't you like about your run flats?
Do a search. There have many owners who have done the same thing your contemplating. Lots of good info.
Super Member
Joined: May 2017
Posts: 632
Likes: 57
From: Trumbull, CT USA
Mercedes-Ben GLC300 4Matic
i have heard good things about the Bridgestone Driveguards
Unfortunately in 18" size they only come 235/55R19 versus 235/60R18 which is the stock size.
overall height is just shy of an inch less.
is it safe to say there will be adverse effect on the vehicle by subbing this size?
the looks are another matter - i am concerned they may look small but may be willing to give them a shot to see if feasible.
Unfortunately in 18" size they only come 235/55R19 versus 235/60R18 which is the stock size.
overall height is just shy of an inch less.
is it safe to say there will be adverse effect on the vehicle by subbing this size?
the looks are another matter - i am concerned they may look small but may be willing to give them a shot to see if feasible.
Senior Member
Joined: Aug 2016
Posts: 435
Likes: 109
From: CA
2021 GLE 450, 2017 GLC 300 4Matic, 2008 FJ Cruiser
Changed the 19 inch Continental RFT on my 17 glc to Michelin Defender LTX night and day difference. Smooth and quiet the way a Mercedes should be. No spare or tire goo with me only Triple AAA and extended hazard warranty on new tires. Never again RFT.
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Newbie
Joined: Sep 2017
Posts: 9
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SAAB 9-3
Run flats suck, in general. In the GLC (and other Mercedes) they make a firm ride harsher. Personally I take my chances with regular tires (I swap out the run flats as soon as they begin to reach tread life) without a spare. That's one reason I have Triple A.
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Senior Member
Joined: Aug 2016
Posts: 435
Likes: 109
From: CA
2021 GLE 450, 2017 GLC 300 4Matic, 2008 FJ Cruiser
