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225/40/18 recommendations

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Yes, but it is not covered in Ice on the Sunny South West.

Scotland is quite a big place with micro climates..

Screenshot 2019-10-14 at 08.28.12.png

Edited by Roottootemoot

4 minutes ago, Roottootemoot said:

Yes, but it is not covered in Ice on the Sunny South West.

 

That must be the bit where the wall was knocked down letting the warm through?

It is the bit where the high strength cider gets through without the extra tax.

Also where the Postie and Home Delivery vans get around & to your door with what ever tyres they come fitted with.

1 hour ago, MarkyG82 said:

 

To be fair he was asking for advice on tyre selection and people were offering options based on the information he provided and that he lives in Scotland which is north of the wall so must be covered in ice.

I am coastal, last year i remember 2 mornings i had to defrost the car and that was it.

 

i have never struggled in the snow with summer tyres. On the odd occasion that it lies for 2 days

10 hours ago, brad1.8T said:

1) That's a bit low.  You need around 38-40psi in a 225/40r18.  Yes the ride will be quite firm.   Yes, this is more than what Skoda have written on the fuel flap.

 

2) This implies that you like to take off in a spritely fashion, which may explain the apparently rapid wear.

 

3) The issue is more about rear grip when braking but I've given up arguing the science behind the recommendation and pointing out that the major tyre manufacturers endorse it.  Whatever works for you.

 

4)  Have you ever seen how the RORO drivers hit the ramps?  I used to check alignments on cars as part of the PD.  Some of them were quite a way out.

 

5) I've had 2 sets of RE050A.  I got 35k kilometres (22k miles?) out of the last set and 32k km (20k miles?) on the set before with x-rotate every 10k km.  The corner transition is already low on tread so any edge wear is very noticeable.  I had one guy try and knock back my registration inspection at 5000km because of the edge design.

 

Goodyear F1A is a great tyre.  You should get good mileage out of it.

 

Think the SEAT recommended pressure is 32 psi for my tyre size so at 34 psi i think it will be okay

 

and as for taking off in a spirited fashion i unfortunately have a manual 1.5 tsi WLTP engined car and it is a nightmare getting off the mark, as seen numerous times in the Karoq forum, basically from a standing start you have nothing then a delay and a big thump of power. It is a very difficult car to get off the mark in any sort of sensible looking fashion. So you do need a bit of extra grip to stop the wheels skating about if you want to enter a road from a junction that you need to get your foot down. Either that or you would be waiting all day to make a sluggish getaway

Edited by BigJase88

If anybody has heard of gretna green im 7 miles north west of there ( roughly 16 miles north of carlisle - thats in your Engerland place )

I used to manoeuvre my Passat Estate at full lock four times a day in and out of parking spaces. That increased my tyre wear especially on the edges. If you carefully check the tread depth across the tyres then you might find that your tyres are over or underinflated. I usually found that a couple of psi high slightly sharpened the handling without causing excess tyre wear. I was doing 700 miles a week then. Not so easy to monitor with a lower annual mileage. Obviously a steering geometry check might help. Maybe over the border? You can not assume a full alignment check has been done at the PDI.

I've found that all seasons tyres also can spin up when pulling out on full lock. Despite the ASR or whatever.

Edited by gregoir

1 hour ago, BigJase88 said:

 

i have never struggled in the snow with summer tyres. On the odd occasion that it lies for 2 days

As long as that!? :) 

Back on topic going into my 4th winter using summer tyres Pirelli P Zero 225/40ZR18 still have 5mm front/rear (rotate them every year) if you are careful putting down the power in the wet it is rare to see the TC light come on in the lower gears. Thanks to these narrower tyres/wheels (normally run 8.5J wheels with 235/35ZR19 Michelins in the summer) and using 95 octane BP unleaded (effectively de-tunes my car back to standard bhp/torque) currently enjoying a 5% improvement in fuel consumption compared to the summer. Run the 225/40 tyres at the recommended 2.4bar while in the summer the 235/35 tyres are run at 2.7bar and I get even tyre wear across the thread on both sets I use on standard Vrs damper/spring suspension.:thumbup:

1 hour ago, gregoir said:

I used to manoeuvre my Passat Estate at full lock four times a day in and out of parking spaces. That increased my tyre wear especially on the edges. If you carefully check the tread depth across the tyres then you might find that your tyres are over or underinflated. I usually found that a couple of psi high slightly sharpened the handling without causing excess tyre wear. 

 

Both these points are something I pay particular attention to.  I make sure the wheels are rolling before turning the steering.  This reduces the force required on the (steering) wheel and reduces wear dramatically.  Told mrs g this 'trick' the other month and she is enjoying the easier handling in carparks etc.

I also over inflate by 1 or 2psi and it seems to counter the greater sidewall wear by adding to the centre wear. 

 

Could be a load of carp though 🐟

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