20” Tyre Pressure

[RobertO2023]

Geometry and tyre pressures are the fundamental requirements for a good tyre life. If it was me the first thing I would do is get a full laser alignment done. If you can get the vehicle weighed noting overall weight and each axle weight with vehicle in the every day configuration.
Distribution of weight will be relative to tyre wear, so your pressures may need to be adjusted accordingly
I run 36psi all around increasing the rears to 40 psi when fully laden and towing a car transporter. You will definitely notice the difference in premium tyres such as Goodyear Michelin Bridgestone . 265 or 255 40 20s seem to be the best for my use. Good luck.

 

[BognorMotors]

Been running my 275/35/20s on original tyres that came with the van (full camper conversion) at the @BognorMotors recommended 40psi. Happy with the ride bearing mind it's a van with low profile tyres and I've not got the funds for a full suspension overhaul.

Tipped over 16,000 miles recently and the rear tyres have pretty much reached (possibly exceeded) their limits. Not complaining too much about the mileage covered compared to some of the horror stories above. The wear is broadly the same across the rear tyres with maybe a little more on the outer rather than the inner shoulders, so setup seems OK. Oddly the fronts are looking really good and still plenty of life left in them. So why have the rears been chewed up so much more quickly? Too much psi? Too little psi? Driving style? Something else? It's a T28, not a 4WD, so a little surprised by the major difference in tyre wear between the front (good) and rear (not so good). Any thoughts?

Will clearly be replacing the rears - currently cheapo "Thunder U09" tyres which I've never heard of previously - with something a bit more reputable. Can see the Goodyear F1s and Michelin PS4s are highly rated above, and Bridgestones maybe less so, but would welcome any other suggestions or recent experiences.

On the plus side, if I can stagger the tyre replacement so that I'm only replacing fronts or rears at any given time it will at least soften or spread out the blows to the bank balance!

We would recommend a full Hunter alignment and our recommended tyre pressure are between 36-40. So maybe drop to 36 and try from there.

 

[doncarlyon]

@BognorMotors do you find a 4motion will wear fronts or rears more? Or is it fairly equal?

 

[BognorMotors]

We’ve run lots of 4motions over the years and always found the wear fairly even. Regular geometry checks helps.

 

[doncarlyon]

We’ve run lots of 4motions over the years and always found the wear fairly even. Regular geometry checks helps.

Cheers

Going for a 4 wheel alignment tomorrow.

 

[Smileysmile]

Hello all

On 275/35 and 265/40 applications we’ve always gone with and recommended 40psi all round. Recently we’ve been experimenting with different pressures.

We’ve had two t32 Kombi s running Bilsteins and 265/40, one on 36psi and the other on 40psi. Both have covered 12000 in a year.

The rear tyres are worn out on the 40psi van, evenly, but illegal. The other van still has 3mm + left.

Bilstein B14s does increase tyre wear, as more is demanded of them, but running slightly pressures, not only increases ride comfort, but also tyre life.

We are playing around with the pressures on our demo van, running the 275/35 tyre and will report back.

What pressures are you all running, on 20’s and anything to add?

Your post is 6 years old. Would you know psi for VW transporter t6.1 T30 for below tyres please.
I have SUNNY tyres on the front.
255/35ZR20 102W (front)
275/35ZR20 103W (rear)

Thanks

 

[Smileysmile]

They've been on a while but the alloys were checked when we got the rear tyres changed a few week ago and nothing reported from the garage. There was damage on the inner wall of one of the old tyres but nothing on the other. Since changing the tyres we are still getting the same issue though. Is 102W a high enough rating for a T28 van with a Caravelle conversion, unsure of what weight the van would be now compared to pre conversion?

Would you know psi for VW transporter t6.1 T30 for below tyres please.
I have SUNNY tyres on the front.
255/35ZR20 102W (front)
275/35ZR20 103W (rear)

Thanks

 

[RobertO2023]

I have always run 36 front 38 rear. Increase rears to 40-42 when towing a heavy trailer. Premium Goodyears 265 40 20 Asymmetric 5, fully adjustable dampers and ride ht added into the mix make it a great handling / comfortable van.

 

[Smileysmile]

Hi all, i've got a newly purchased T6.1 T28 transporter with caravelle conversion. I'm having issues with the rear tyres deflating to 10psi on a weekly basis, even after changing to new tyres this is still happening. Tyre size is 275/35zR20 102W rated. The van has had a B14 suspension conversion if it helps. Been filling up to 43psi, could this be a weight issue overloading the tyres? Finding the ride very firm and crashy as well.

What tyre pressures do you have now?

Mine is a VW Transporter T6.1 T30.
Front 255/35/ZR20 102W
Rear 275/35ZR20 103W

 

[BognorMotors]

Your post is 6 years old. Would you know psi for VW transporter t6.1 T30 for below tyres please.
I have SUNNY tyres on the front.
255/35ZR20 102W (front)
275/35ZR20 103W (rear)

Thanks

I would work between 36-40 psi and experiment on how it feels, tyre wear etc. Maybe on the front go up to 42psi. But no higher

On our Solow air demo van running 255/35 all round we run at 42psi and it’s perfect.

 

[Smileysmile]

I would work between 36-40 psi and experiment on how it feels, tyre wear etc. Maybe on the front go up to 42psi. But no higher

On our Solow air demo van running 255/35 all round we run at 42psi and it’s perfect.

Thanks for your response.
The rear tyres went completely bald. Since replaced. I was told go 45psi but put them to 40 psi with the front at 40.

The front was 35 psi and starting to wear on the edges.

It's a T30 running on Air ride. No heavy weight although rear STIDE seat bed installed last year. Furniture and fridge will be fitted in a few weeks. No pop up tent will be installed that's it. So the rear, about 40? Thanks

 

[BognorMotors]

My pleasure. I would go at 40 all round and workout from there.

 

[monkeybusiness]

My pleasure. I would go at 40 all round and workout from there.

That's what I did. Works for me (265/40/20).

 

[BognorMotors]

That's what I did. Works for me (265/40/20).

For that size I would start a little lower at 36psi.

 

[monkeybusiness]

For that size I would start a little lower at 36psi.

I'll try that. I admit the tyres look a little flat at <40psi.

 

[NickyBrown08]

I have the same Sunny tires 255/35/20 and I run at 40psi. Mine seem to be spot on.

 

[Smileysmile]

I have the same Sunny tires 255/35/20 and I run at 40psi. Mine seem to be spot on.

On the rear?

 

[NickyBrown08]

All round.

 

[camperer]

On the rear?

Try this .... All Tire Pressures, Models, Tire Types and more

 

[ChestnutBrown]

Try this ..... All Tire Pressures, Models, Tire Types and more

No Transporter’s listed on that link.