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Wales
by Joske Vermeule, September 1
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Forums39
Topics49,908
Posts838,123
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Most Online1,063
Jun 14th, 2026
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Joined: Jul 2007
Posts: 27,846 Likes: 764
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,846 Likes: 764 |
What tyre pressures?
I run my +4 at 25 psi vs 22 as then it misses the speed humps on my road
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Apr 2008
Posts: 655 Likes: 12
Talk Morgan Regular
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Talk Morgan Regular
Joined: Apr 2008
Posts: 655 Likes: 12 |
The plus 4 has a much better sump clearance than the roadster. Nevertheless, I soon found that I had to increase ground clearance a bit. I went up from 195/60R15 to 195/65R15. This gives almost 10mm increased ground clearance and improved comfort on bad road surfaces.
Harald
Harald
+4 4-seater 2008 Squadron Blue
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Joined: May 2007
Posts: 849 Likes: 2
TM Photographer of 2008 Talk Morgan Regular
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TM Photographer of 2008 Talk Morgan Regular
Joined: May 2007
Posts: 849 Likes: 2 |
The plus 4 has a much better sump clearance than the roadster. Nevertheless, I soon found that I had to increase ground clearance a bit. I went up from 195/60R15 to 195/65R15. This gives almost 10mm increased ground clearance and improved comfort on bad road surfaces.
Harald Harald, do you have a  of the car. I have considered doing this as I think the car will look better as well as saving the tailpipe from grounding.
Ken
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Joined: Sep 2011
Posts: 14,749 Likes: 158
Member of the Inner Circle
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Member of the Inner Circle
Joined: Sep 2011
Posts: 14,749 Likes: 158 |
What tyre pressures?
I run my +4 at 25 psi vs 22 as then it misses the speed humps on my road
I am currently running 1.8 bar (26 psi) as recommended by Borghi. With the tyres fitted 1.5 bar (as per the manual) makes the car not only about half a centimetre lower but too squirmy on the road. I tried running 2 bar but the ride was too hard. I purchased a top quality tyre pressure guage so as to be able to control the pressure acurately all the time. The guages at service stations are always wrong.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Joined: Jul 2007
Posts: 27,846 Likes: 764
Member of the Inner Circle
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Member of the Inner Circle
Joined: Jul 2007
Posts: 27,846 Likes: 764 |
I only use my pump/ guage & agree on the inaccuracy of the garage ones.
I also found though there is a real need to check them regluarly with tubeless wires vs normal rims
JohnV6
2022 CX Plus Four
2025 Renault Scenic Alpine etech "Yvette"
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Joined: Apr 2008
Posts: 655 Likes: 12
Talk Morgan Regular
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Talk Morgan Regular
Joined: Apr 2008
Posts: 655 Likes: 12 |
Here is a photo I posted earlier. Note the dog with his safety harness on. The car has a third seat belt stalk in the rear seat. The wheels are 195/65R15 except the spare wheel which is 165R15 to save weight and space. Harald 
Harald
+4 4-seater 2008 Squadron Blue
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Joined: Sep 2011
Posts: 14,749 Likes: 158
Member of the Inner Circle
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Member of the Inner Circle
Joined: Sep 2011
Posts: 14,749 Likes: 158 |
Interesting point about the spare. With mine the spare is hard up against the high level stop light. A taller tyre would not fit. Perhaps we need variable ride height like a Citroen.  Just kidding - really I am. 
Peter
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Joined: Feb 2011
Posts: 1,155 Likes: 2
Has a lot to Say!
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Has a lot to Say!
Joined: Feb 2011
Posts: 1,155 Likes: 2 |
Asked about raising the ride hight of my plus 4 so that we can drive over our multitude of road speed humps at the factory last week but they were unable to provide a solution ...Front can be changed but not the rear ..!!!
Peter.
Aero plus8 50th Anniversary.
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Joined: Apr 2008
Posts: 655 Likes: 12
Talk Morgan Regular
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Talk Morgan Regular
Joined: Apr 2008
Posts: 655 Likes: 12 |
Perhaps we need variable ride height like a Citroen. I have in fact recently seen a roadster 4 seater with air suspension and adjustable ride height at the rear! Harald
Harald
+4 4-seater 2008 Squadron Blue
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Joined: Feb 2011
Posts: 14,009
Member of the Inner Circle
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Member of the Inner Circle
Joined: Feb 2011
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If you have spacers fitted between your back axle and the springs ( a lot of the cars do) these presumably could be replaced with thinner ones to raise the rear ride height.
Jays
Former Morgan owner. Gone but hopefully not forgotten!
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