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Sunday, December 5, 2021

Why Supercars does not use a full moist tyre

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Grooved rubber was a sizzling matter within the Supercars paddock on Sunday after the second of two 250-kilometre races was known as off as a consequence of rain.

The sector did full quite a few laps behind the security automobile earlier than being known as again to pitlane the place they sat for 35 minutes earlier than a choice was taken to desert the race.

Opinion between drivers was break up over whether or not that was the best name or not, whereas TV interviews throughout the preliminary stoppage drew quite a few references in regards to the Dunlop management moist climate tyre not being a “full” moist able to coping with the standing water.

The long-standing moist, comparatively unchanged over Dunlop’s two-decade stint because the management provider, is designed to be extra of an all-rounder suited to the comparatively delicate Australian climate, and subsequently extra tolerant to drying situations.

Nevertheless that does go away it susceptible to uncommon situations of monsoon rain, equivalent to what was seen at SMP over the weekend.

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In keeping with Kevin Fitzsimons, head of Dunlop’s Supercars programme, introducing a full moist is solely potential, however would drive up prices and enhance wastage given how not often it will be required.

“[The current tyre is] classed as a moist climate tyre however it’s actually an aggressive intermediate,” Fitzsimons informed Autosport.

“It is bought much more grooves than a typical intermediate has for those who had a full moist, an inter after which a slick.

“But it surely’s tougher in its compound than what a full-blown moist could be. And a full moist would have a way more aggressive sample for channelling out water.

“It will additionally fall to bit on a drying observe 80 per cent quicker than this present moist tyre does.

“The tyre is ok when the situations are proper, however when there’s heavier rain like we had on the weekend it isn’t best.

Chaz Mostert, Walkinshaw Andretti United Holden

Picture by: Edge Photographics

“We might make a simpler moist tyre however it will not final like the present one does. So the groups might want to have slicks, intermediates and wets. Which means they will want extra wheels to mount them on.

“And the way lengthy are you able to retailer them for? 4 months? Six months? Twelve months?

“It is only a cash factor. We do not have that many moist race conferences, it isn’t like we’re in Europe and we’re continually becoming moist climate tyres.

“For 20 years [the current wet tyre has] been wonderful. These feedback come up each now ands then, significantly when guys have not had a very good weekend.

“It is a straightforward factor to level the finger at, that the moist tyre is not best.

“We all know it isn’t best in each situation – however it does the job its designed to do completely nicely. And that is to not throw blocks at spectators after eight laps on a drying observe.”

Fitzsimons added that the groups usually do not assist the tyre with set-up, significantly in the event that they assume the observe might dry out throughout the race.

“It comes all the way down to automobile set-up as nicely, the place there is a compromise when [teams] are hoping it could dry out,” he stated. “So that they go away the dry set-up with the camber on.

“Which means two-thirds of the tyre is not involved with the street floor and it isn’t pumping the water out. You are principally driving on a 150mm large tyre versus a 300mm large tyre.

“We get the tyres again and the surface blocks have not even touched the observe. They’ve nonetheless bought all of the vent dimples on them. It is actually, actually apparent.”

As for Sunday’s wash-out, Fitzsimons conceded that there was in all probability a bit an excessive amount of standing water for protected racing even when vehicles have been working a full moist set-up.

“right here was a number of standing water,” he stated. “[The tyre] can solely pump out what it could possibly pump out. When you’re going actually, actually fast and it could possibly’t squeeze the water out, that is whenever you get aqua-planing.

“When the crimson flag occurred I walked all the way down to pit exit and regarded by Flip 1 and there was a big quantity of standing water.

“The floor at SMP is especially worn, that is why we noticed guys within the Shootout driving approach off the apex looking for some sharp stones to dig into the tyre. It makes it tough.”

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