Rear tyres wearing on edges

Rear tyres wearing on edges

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Matt_T

Original Poster:

527 posts

82 months

I have a Honda Accord Tourer and I keep the tyres at their recommended pressure of 33 psi / 2.2 bar.

The rears are wearing on the edges much faster than the middle - can this only be a tyre pressure issue? Do I need to increase the pressure to 36 psi / 2.4 bar?

I quite often have 4 people plus bikes on a towbar rack, for long journeys.

(Note pic is my winter tyres but summer tyres do the same).


Simon_GH

419 posts

88 months

Outer tyre wear is typically due to the pressure being a bit low. Might be worth checking the pressure on a second gauge just in case yours is reading a bit high. Either way, I’d pop the additional 3 psi in and monitor,

I had the opposite problem (centre wearing a bit a quicker ) and dropping a couple of psi helped correct the wear pattern.

MustangGT

12,330 posts

288 months

Matt_T said:
I have a Honda Accord Tourer and I keep the tyres at their recommended pressure of 33 psi / 2.2 bar.

The rears are wearing on the edges much faster than the middle - can this only be a tyre pressure issue? Do I need to increase the pressure to 36 psi / 2.4 bar?

I quite often have 4 people plus bikes on a towbar rack, for long journeys.

(Note pic is my winter tyres but summer tyres do the same).

Most manufacturers have different recommended pressures based on load. Given your statement on loading I would be looking towards the upper pressure values.

Pica-Pica

14,516 posts

92 months

MustangGT said:
Most manufacturers have different recommended pressures based on load. Given your statement on loading I would be looking towards the upper pressure values.
There is an issue with ‘square’ set ups (that is, same size front and rear tyres); there is a large pressure difference required between minimal load and a full load. (That’s one advantage of a staggered set, with larger rear tyres, the low to full load pressure difference is smaller).

MustangGT

12,330 posts

288 months

Pica-Pica said:
MustangGT said:
Most manufacturers have different recommended pressures based on load. Given your statement on loading I would be looking towards the upper pressure values.
There is an issue with ‘square’ set ups (that is, same size front and rear tyres); there is a large pressure difference required between minimal load and a full load. (That’s one advantage of a staggered set, with larger rear tyres, the low to full load pressure difference is smaller).
Not that I have seen unless they are totally changing the footprint area. Tyre pressure is simply mass/footprint using lbs and square inch to get PSI. So a mass of 990lbs and a footprint required of 30 square inches gives a pressure of 33 PSI. Increase the weight by 150lbs and you need to increase the pressure by 5 PSI to get the same footprint.

wyson

2,762 posts

112 months

https://whattyrepressure.co.uk/brands/honda/accord...

Above says rears should be 41psi if the car is loaded. All the front wheel drive cars I’ve had have been like this. I always up the pressures at the rear if it has people and luggage. Just follow your manual / door sticker.

I brought one of those cigarette lighter Ring air compressors so its easy to pump in air. Back that up with a tyre pressure gauge for taking air out.

Edited by wyson on Monday 2nd December 17:06

Matt_T

Original Poster:

527 posts

82 months

wyson said:
https://whattyrepressure.co.uk/brands/honda/accord...
Above says rears should be 41psi if the car is loaded. All the front wheel drive cars I’ve had have been like this. I always up the pressures at the rear if it has people and luggage. Just follow your manual / door sticker.

I brought one of those cigarette lighter Ring air compressors so its easy to pump in air. Back that up with a tyre pressure gauge for taking air out.
Thanks wyson - it does seem like I'm doing half my driving with a load in the back (people, bikes, paddelboard etc) so need to be using the 41 psi 'Rear Loaded" pressure.

I would have though in a front engine car the weight on the front wheels would be significantly more so these would need the higher pressure?



wyson

2,762 posts

112 months

Matt_T said:
Thanks wyson - it does seem like I'm doing half my driving with a load in the back (people, bikes, paddelboard etc) so need to be using the 41 psi 'Rear Loaded" pressure.

I would have though in a front engine car the weight on the front wheels would be significantly more so these would need the higher pressure?
Look on your door sticker or manual.

E-bmw

9,993 posts

160 months

Yesterday (07:59)
quotequote all
Matt_T said:
wyson said:
https://whattyrepressure.co.uk/brands/honda/accord...
Above says rears should be 41psi if the car is loaded. All the front wheel drive cars I’ve had have been like this. I always up the pressures at the rear if it has people and luggage. Just follow your manual / door sticker.

I brought one of those cigarette lighter Ring air compressors so its easy to pump in air. Back that up with a tyre pressure gauge for taking air out.
Thanks wyson - it does seem like I'm doing half my driving with a load in the back (people, bikes, paddelboard etc) so need to be using the 41 psi 'Rear Loaded" pressure.

I would have though in a front engine car the weight on the front wheels would be significantly more so these would need the higher pressure?
They are until the car is fully loaded, just look at a silhouette picture of your car & see where the additional weight is going.

The weight from the front seats is in the middle, everything behind that is firmly centred over the rear wheels.