2015 GLA 45 Spare Tire Mod

[rpaoness]

Here's a history of a gla 45 owner.

https://www.glaowners.com/threads/spare ... ted.13474/

"ML63 AMG spare (donut) wheel/tire. The bolt pattern (5 112), wheel diameter (19") and offset (45-48 mm) were a match for the 19" AMG wheel that is standard on the GLA45. This is an alloy wheel set up as opposed to a steel wheel"

[rpaoness]

https://www.ebay.com/itm/127136202174?c ... zfEALw_wcB

$151

[rpaoness]

This one's a little cheaper ($135?) than what you linked on the other thread, but an 18" rim vs. 19":

195/75r18:

https://www.ebay.com/itm/127261030509?_ ... 8WJX0NR45V

Here was your link (175/50r19):
https://ebay.us/m/ywNF2h

[kevm14]

I was thinking you probably want the 19 but I don't really know.

[kevm14]

So mine is 155/70-19. You can get the height from that.

[rpaoness]

155/70R19 = 27.5in

Stock GLA 20" wheel tire size per tire rack: 235/40R20 = 27.4in

175/50R19 = 25.9"


Specification Sidewall Radius Diameter Circumference Revs/Mile Difference
175/50-19 3.4in 12.9in 25.9in 81.3in 779 0.0%
235/40-20 3.7in 13.7in 27.4in 86.1in 736 5.8%

[rpaoness]

This guy got a "conventional" compact spare tire to fit.

https://www.glaowners.com/threads/no-sp ... tby=oldest

I do have more confidence in the 19" rim clearing the GLA brakes. I guess I'll order a compact/folding R19 one at some point soon.

[kevm14]

Sounds like S class height is a great match. But you'd have to find a folding one at that height.

[rpaoness]

Here's one with a spare compressor for $250. Not sure if all the rim PNs are the same or if there are different bolt patterns or offsets.

https://www.ebay.com/itm/157290916385?_ ... uiZg&pfm=0

They all seem to have the same collapsible tire size and I'm probably just stuck with the tire size diameter/circumference delta.

[kevm14]

Says W221 in the description but then SL in the title. What size is it?