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Tyres..what's the best alternative to run flats


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Morning Roy

What are you trying to achieve?? Better Ride ? More Grip ? Quieter Ride ? 

Runflats are well known for delivering a harsh ride, particularly towards the end of their useful life, as well as more road noise.

So if you are keeping the same wheels buy the same size tyres but non run flat, just don't buy cheap. Tyre footprint is about the size of a saucer, and that's all there is to accelerate, stop and steer your car. I always stay with recognised brands I am on Yoko's at the moment 275 x 40 x 20 Front 315 x 35 x 20 Rear. My brother inlaw has 535d touring and runs 245 x 40 x 19 Front 275 x 35 x 19 Rear Bridgestone non runflats.

If changing wheels to try and improve ride quality by fitting tyres with a taller side wall Brake size will dictate what will fit (18" I believe) so something like 245 x 45 x 18 may give a more forgiving ride

Dave

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On 8/31/2021 at 7:30 AM, Greydog said:

Morning Roy

What are you trying to achieve?? Better Ride ? More Grip ? Quieter Ride ? 

Runflats are well known for delivering a harsh ride, particularly towards the end of their useful life, as well as more road noise.

So if you are keeping the same wheels buy the same size tyres but non run flat, just don't buy cheap. Tyre footprint is about the size of a saucer, and that's all there is to accelerate, stop and steer your car. I always stay with recognised brands I am on Yoko's at the moment 275 x 40 x 20 Front 315 x 35 x 20 Rear. My brother inlaw has 535d touring and runs 245 x 40 x 19 Front 275 x 35 x 19 Rear Bridgestone non runflats.

If changing wheels to try and improve ride quality by fitting tyres with a taller side wall Brake size will dictate what will fit (18" I believe) so something like 245 x 45 x 18 may give a more forgiving ride

Dave

If changing from run flats, the suspension should be adjusted too. You should also let your insurance company know, as it would be classified as a modification.

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Hi Philip

How is the suspension adjusted on the 335d?

I know the tracking and wheel alignment can be set/re-set which is good practice at every tyre change. Also as long as tyres are within the BMW specification why would you have to inform insurers, bearing in mind wheel/tyre combinations are available from 18" to 20" in a range of width combinations and tyre widths as standard OEM equipment dependent on customer order. This of course does not include Winter wheel and tyre combinations which are non runflat yet an OEM fitment with no recommended changes to the suspension shown in BMW TIS

I agree Insurers would want to know if the wheel tyre combination were outside the OEM specification. But if every time a new set of tyres are purchased ??

Dave

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Morning Richard

The Michelins have had som good write ups and there seem to be some good deals going as well

When had the 4.4 it was LPG converted to the spare wheel is still in the garage full size 17" never seen the light of day let alone the road 😁 I carried a small compressor and a can of tyre goo in case of punctures. Still got those in the back of he 4.6. Tempt fate now in 18 years and a lot of miles I have used it once.

Dave

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