spare tire not fully inflating. - Mercedes Benz SLK Forum

Tires, Wheels, Brakes & Suspension Discussion and information regarding tires, wheels, brakes and suspension.

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#1 Old 01-11-2019
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spare tire not fully inflating.

Hey, New here. I have a 2013 SLK 250. I got this car recently and finally got a hole in the side of the tire. Thank you Mass potholes. Im trying to put the spare tire on so I can fix/replace the bad tire, but it seem that the space saver tire will not fully inflate. the little pump is at 6/7 and the inside of the spare is fully out but the front won't fully fold out. do I just keep pumping, or what? its never been used before. could it be frozen? (mass currently about 30 degrees outside)

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#2 Old 01-11-2019
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MB recommend replacement of spacesaver at six years so I guess the tyre is getting to the end of it's 'shelf life' and they do harden over time. That being said, can you get the wheel/tyre to a gas station with an air pump? Those wee pumps in the inflator kit are pretty puny.
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#3 Old 01-11-2019
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Thanks. I brought it inside and it warmed up and fixed itself. any idea on PSI for these space saver tires? all the other spares I've had for other cars were donuts and wanted 80 psi. does this differ?
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#4 Old 01-11-2019
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Owner's manual or the side of the tire or placard in door might offer the amount psi


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#5 Old 01-11-2019
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Thank you!
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