GLK-Class (X204) Produced 2008-2014

tires 235/45 R20 vs 245/40 R20

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Old 12-05-2023, 06:49 PM
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GLK350 ML55 Ducati Porsche
tires 235/45 R20 vs 245/40 R20

or my GLK 350 (AMG package) Which tire should I buy (stock) 235/45 R20 vs 245/40 R20? Anyone have experience with 245/40 R20 ?


Installed and balanced for $800 Candian tax in. About $560US

Last edited by m00nd0gy; 12-06-2023 at 07:07 AM. Reason: pic size was too large, remove white frame , add text
Old 12-06-2023, 07:30 AM
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2006 Alfa Romeo Brera, 2010 GLK350, 2018 BMW 640i GT, 1997 Subaru SVX, 2012 Moto Guzzi Norge GT8V
I have 255/45/20 (+2.51%) which corrected the speedometer error, look good and give a little higher sidewall for the rough Quebec roads.
245/40/20 (-2.15%) which gives more error and less sidewall for your equally bad New Brunswick roads. 245/45/20 are a better choice at +1.24%.

Last edited by Silver Shadow; 12-06-2023 at 07:34 AM.
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Old 12-06-2023, 07:51 AM
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GLK350 ML55 Ducati Porsche
Originally Posted by Silver Shadow
I have 255/45/20 (+2.51%) which corrected the speedometer error, look good and give a little higher sidewall for the rough Quebec roads.
245/40/20 (-2.15%) which gives more error and less sidewall for your equally bad New Brunswick roads. 245/45/20 are a better choice at +1.24%.
Thanks. Yeah, i wanted the 245/45r20 for the slightly taller sidewall but no inventory. I'm heading to south floirda until May. The roads are a little smoother down there.I think these tire last about 3 years.
https://tirewholesale.ca/centara-van...245-40zr20-95w

Last edited by m00nd0gy; 12-06-2023 at 08:02 AM.
Old 12-06-2023, 08:08 AM
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If that's a picture of your wheel on your car you already have 245/40/r20...
Old 12-07-2023, 06:47 AM
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Originally Posted by angryartichoke
If that's a picture of your wheel on your car you already have 245/40/r20...
Read post #3 again.
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Old 12-07-2023, 07:50 AM
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Here's is compare to stock tires

Old 12-07-2023, 08:48 AM
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Originally Posted by Silver Shadow
Read post #3 again.
"or my GLK 350 (AMG package) Which tire should I buy (stock) 235/45 R20 vs 245/40 R20? Anyone have experience with 245/40 R20 ?"

I was responding to your OP.
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