Spare wheel size

Aug 24, 2014 | 10:44 AM

edgar86

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Joined: Aug 2014

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From: EURO

GLK CDI 320 2009

Spare wheel size

Hi there ,
I just noticed my spare wheel is 17" and all my 4 wheel are 19" ,
should i keep it or is it useless and will harm the 4 Matic transmission ?

Aug 24, 2014 | 11:14 AM

Rascally Wabbit

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Joined: Apr 2013

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From: Tucson AZ

2010 Mercedes GLK 350, 2001 BMW Z3 3.0 Roadster, 1997 Cherokee XJ

Overall rolling diameter of the 17" spare will approximate the diameter of the 19" or 20" OEM wheel due to the different aspect ratio when inflated. MB offers a 17" winter tyre package in certain countries which again have the roughly the same diameter. You can play with these dimensions on www.tirerack.com There is no need for concern.

Aug 24, 2014 | 05:51 PM

edgar86

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Joined: Aug 2014

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From: EURO

GLK CDI 320 2009

Hmm if i understand ; you say this wheel goes to same diameter as the 19" when inflated ?

Aug 24, 2014 | 06:15 PM

Rascally Wabbit

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Joined: Apr 2013

Posts: 445

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From: Tucson AZ

2010 Mercedes GLK 350, 2001 BMW Z3 3.0 Roadster, 1997 Cherokee XJ

This video shows how they inflate.

With supplied pump, it will take longer but it will work, about 5 minutes.

Aug 24, 2014 | 06:21 PM

edgar86

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Member

Joined: Aug 2014

Posts: 83

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From: EURO

GLK CDI 320 2009

ah ok i never saw something like that , going from my French Renault car to the MB world is amazing

thanks for showing me the light .

Jan 18, 2015 | 05:16 PM

sblvro

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Joined: Jan 2015

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2020 C8, 2020 defender 110X, 2019 720S, 2014 GLK 350 4matic, 2015 escalade platinum, 2013 RRS HSELux

Thanks for this pic! Didn't know it came supplied with its own pump!

Jan 19, 2015 | 09:27 AM

Bob338

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Joined: Jan 2011

Posts: 571

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From: Redding, CA

'85 190D , '12 E350 BlueTec, '13 GLK 250 BlueTec

Unfortunately I had occasion to have to drive several hundred miles on my spare which was mounted on the right front. Because of the disparity I questioned what effect it might have on steering. I've used different size tires on the front on non 4 wheel drive vehicles. The difference in size is immediately noticeable.

In this case I noticed absolutely no difference in steering or driveability. Only problem was having to drive under 50 mph. They've obviously figured it out as to size, which is probably the reason that spare is so damned expensive.