LUX Editor-in-Chief Darius Sanai tries out Michelin’s supercar tyres on his Ferrari 430 Spider to see whether they’re worth the investment

Tyres are a curiously under-explored subject when it comes to supercar optimisation and maintenance. You can have conversations all day long with fellow owners about filters, suspension geometry, engine remapping, and other arcane elements of your car’s construction that might add fractions of a second to your lap time on a circuit.

But conversations about the patches of rubber that actually transmit all the power, and handling, from the car to the road and vice versa, are frequently limited to the very basics. How big are your wheels? How wide are your tires? Are they okay to drive when they have a certain amount of tread left, or a certain age?

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But tyres are, as any Formula One driver knows, far more important than that. Not only are they the only point of contact between your car and the road, they also elements of your car that will never, ever be made by the manufacturer of your car. You may have a Ferrari, a McLaren, or a Lamborghini, but your tyres will always be made by third-party manufacturers.

Each manufacturer has a range of tyres optimised for types of car and driving. My Ferraris were all supplied with Pirelli P Zero tyres, with the owners’ handbooks stating that these and similar Michelin and Bridgestone tyres were all officially approved. Owners’ forums, meanwhile, were full of discussion about the latest range of Michelin tyres for supercars, the Pilot Sport 4S.

Michelin PS4S tyres

Of all my Ferraris, there is one model that has become my car of choice for a sunny, weekend high-speed drive in the countryside. The 430 Spider is the last of the line in a significant way. Certain model lines of Ferrari are celebrated for their ‘mid engines’, meaning the engine is located just behind the driver’s head, rather than under the front bonnet. They are also celebrated for their “gated manual” gearshift: a metal manual gear-lever which moves around a race-style bar metal gate, a work of art in itself. The 430 Spider is the last, and most modern, Ferrari that combines these two attributes; all mid-engined Ferraris since then have been made only with paddle-style gearshifts by the steering wheel, and no clutch pedals, like an automatic.

So the 430 Spider is a piece of history, and quite rare: a few hundred were made in right-hand drive. And it’s also tremendous fun to drive, combining a 485hp engine behind your head, no roof, sharp handling, and the opportunity to shift gear yourself. There was nothing wrong with the way it drove on its Pirelli tyres, in fact it was quite thrilling, but I decided to swap over to the new Michelins to see if they made any difference.

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First thing to notice: the car rides appreciably more smoothly on the new tyres. Lumps in the road that formerly jarred now only bump. But you don’t buy a Ferrari for its comfortable ride.

Going for an enthusiastic drive, the improvements made themselves known more subtly. Previously, turning into a corner, the car felt sharp, but now that sharpness, and feel, was there all the way through each curve. It was as if there was a new channel of communication open with the road. Push harder around the corner, and the feel increased: you had a stronger sense of what the car was doing.

Modern Ferraris have a switch on the steering wheel that allows you to flick between driving modes; the F430 was the first to have this, and for enthusiastic driving I switch mine to Race. This sharpens up responses and also means the car is allowed to slide around a bit when you are driving at its limit, before the electronic systems (usually) catch the car. Pushing on, in Race mode, the car now feels more adhesive at the limit – it simply feels like it sticks to the road more. It’s not a transformation – the car always had superb roadholding – but now you feel more on the way, and can stay gripping the road longer.

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I haven’t tested another of the PS4S’s supposed attributes, its wet weather grip, because I don’t take my car out in the wet; and hope not to test another of its noted qualities, its performance under emergency braking.

Normally, performance and comfort in tyres are in inverse proportion: the more comfortable the tyre, the less suited to high-speed driving, and vice versa. The PS4S (not to be confused with another Michelin tyre, the less sporty PS4) manages somehow to combine both. In terms of investing in an upgrade in your car: if you have a car worth £150,000 (or euros, or dollars) or more, spending around 1% of that on a set of new Pilot Sport 4S tyres might just be the smartest investment you make.

Find out more at michelin.com and ferrari.com

The Mercedes-Benz C63 AMG: Mercedes’ high-performance version of a family car

Our high-performance Mercedes-Benz C63 AMG is transformed further by the simple expedients of an excellent annual service, and new high performance tyres from Michelin

Just like a racehorse owner would not stand (I would imagine) for dealing with somebody who has no idea what they’re talking about as an interlocutory for their racehorse care, the most frustrating element of looking after your cars is dealing with someone purportedly in a service department who wouldn’t know a V8 from a vegetable. If you know more about cars than your service advisor, I advise you to change dealerships.

Dino, on the other hand, talked me through any potential issues with the car with deep knowledge, and was delightful to deal with. The car passed with flying colours, and the real surprise was when it came home. I thought its slight grumpiness had been due to the cold winter weather, but in fact with an oil change and related items in the service, the thoroughbred engine was hugely, demonstrably smoother and more refined. Note to self: service the car next time before she even asks.

When you have such a powerful engine in a relatively light car, one challenge you may come across as with the tyres. After all, these are the only things responsible for transmitting the kinetic energy of the car onto the road and thus propelling it forward. On my car, I had the correct specification high-performance tyres, which had been on the wheels for nearly three years. Accelerating hard out of a junction or corner, sometimes the tyres would spin round without getting traction. In heavy rain, fast cornering sometimes made me wonder if the car was going to hang onto the road or not.

I put all this down simply to the slight imbalance. The car was just a bit too powerful for its own good, or so I thought. But on closer inspection, my tyres were halfway worn. Time to change them. Rather than simply change for more tired of the same make, I decided to do what few people end up doing, and change all four tyres to the latest and supposedly best versions for a completely different marque.

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I had heard more than good things about the latest tire from Michelin, the Pilot Sport 4S. Enough users reported that it had transformed their supercar driving experience, that I thought I would take the plunge on all four tyres on the AMG. But how big a difference could really make? Would it really be worth it?

Michelin PS4S tyres

As I drove the car out of the Kwik Fit depot in Chelsea wearing four new Michelin PS4S tyres, I muttered aloud to myself that the car had been transformed. First, and unexpectedly, the ride was smoother. Lumps, bumps and little potholes in the road were not transmitted to me faithfully, shopping trolley style, as they had been with the previous tyres.

This was unexpected because high-performance tyres are, by nature, hard. They are made to give little in cornering, so that they can transmit the forces generated by the car faithfully to the road.

So, would the flipside be softer, less racy handling? I didn’t want that. Astonishingly, though, handling was also transformed – in a positive direction. The car seem to have a bigger, broader, stickier footprint on the road. You could feel more, in a positive way,  exactly how the car was positioned for a corner. There was no more wheel spin on exiting small roads in the cold and wet; when it rained, the car felt like it was on rails, rather than threatening to skate off them. This is why these cars were so sensational when they were new, I remembered, and why car writers consider them modern classics.

Searching for an analogy, the best I could come up with after a couple of weeks was going on previously it felt like the car had been wearing a rather old pair of dress shoes with shiny leather soles. Now it was wearing top specification athletic running shoes with support everywhere and super gritty soles. The analogy also extended to the ride, with the cushioning that implies. The manufacturer’s blurb says this is due to “a hybrid belt of aramid and nylon ensuring the optimum transmission between steering instruction and the road” – which must be true.

The difference is so immense, that I have asked myself what I would have thought, had the car been taken away, and the tyres changed, without my knowledge. If I had been driving the car and forced to guess what exactly had been upgraded, I might of said it had a whole new suspension system.

I can’t think of any further praise that saying that I am now seriously considering fitting for the same tyres to one of my Ferraris, which had four new tyres from the marque previously worn by my AMG, just two years ago. Watch this space.

And as for people owning high-performance metal rooms years into the future: well, there’s still quite a market for archaic, gravity defying and fabulous tourbillon mechanical watches.

Find out more at michelin.com and mercedes-benz.co.uk