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Off road with 20" wheels

stangrp

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Dec 20, 2018
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#1
Hi, My GL 350CDI has 275/55 R20 wheels, we are going to Namibia in 2019 and will require tyres to be deflated in some areas, does anybody have experience of deflating the 20" tyres or should I consider installing 18" with 265/60 R18 tyres
 

Chris B

G-Wagen Club SA
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May 21, 2009
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#2
I have not own 20” wheels before, but 18” wheels will always be a benefit in any offroad situation ( if it will fit?)
 
Last edited:

Senex

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Mar 15, 2019
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Howick
#5
Hi, My GL 350CDI has 275/55 R20 wheels, we are going to Namibia in 2019 and will require tyres to be deflated in some areas, does anybody have experience of deflating the 20" tyres or should I consider installing 18" with 265/60 R18 tyres
I swopped mine for 17" rims. I do a lot of off-road with 265x65 tyres. Great flotation and still excellent and predictable on-road roadholding.
 
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#6
I doubt if 18" mags will fit on the GL. I tried fitting a set, and they would not go over the front calipers & disk.
Smallest diameter that you can use is 19" However the choice of tyres is limited. For this reason I fitted the 20"
 

Pete460332

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G-Wagen Club SA
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#8
What spare are you using with the 275/55- 20 ?. The emergency standard spare that comes with car is 4 % smaller in diameter than the 275/55-20 so cannot be used for any distance and I'm sure the wheel sensors will complain
 
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#9
What spare are you using with the 275/55- 20 ?. The emergency standard spare that comes with car is 4 % smaller in diameter than the 275/55-20 so cannot be used for any distance and I'm sure the wheel sensors will complain
Hi, Thanks for your response, My GL has a space saver which doesn't mean much in an off road wheel emergency, my plan was to put smaller rims on but smallest rim size on the GL cis a 19" due to the large disks. After fitting new Pirrelli scorpion + tyres I decided to go without an extra full size wheel and for the first time in all my offroad trips (approximately 100 000 km's) I had a puncture on the road out of Sesriem (C21 I think) a stone or something slashed the tyre in the tread and we managed to get back to Sesriem and installed a garter, the mechanic could only guarantee a couple of hundred Km's and eventually I managed just over 4000km's before I finally got a 2nd hand 20" to get me home. Lesson learnt, never travel in far off places without extra wheels. If I had a conventional size 17" wheel I could have got tyres in virtually every town but not a 20"
As for feedback on deflating the tyres, I dropped them to 1.2 Bar and no issues in sand
 

munga

G-Wagen Club SA
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#10
What are you doing about storing the full size spare? Do you think it could fit deflated in the current spare position? I have managed to find a used spare 20" rim and have put a tire on it so have 5 wheels.

I just bought a 2010 - GL 500 and also put on 275/55/r20 Pirelli Scorpion ATR+. Any feedback on these? Seem to get good reviews.
 
Joined
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#12
What are you doing about storing the full size spare? Do you think it could fit deflated in the current spare position? I have managed to find a used spare 20" rim and have put a tire on it so have 5 wheels.

I just bought a 2010 - GL 500 and also put on 275/55/r20 Pirelli Scorpion ATR+. Any feedback on these? Seem to get good reviews.
To the question of what I will do with a full size spare, the plan for our next trip is to install my roof rack and place wheels / tyres on the roof, alternately my off road trailer will take at least 1 tyre on the roof.
Feedback on the Pirelli Scorpion AT +, apart from the puncture (and it was rear left) I was happy with the tyres, I also do a lot of tar road driving and towing a Jurgens Classique caravan I have found the tyre to be fairly quite on tar