High tyre wear raises prospect of exciting Korean Grand Prix (Practice two analysis)

The low-grip surface at Korea and the high tyre degradation the teams are experiencing could be the a recipe for an exciting race on Sunday.
On top of that the three championship contenders all seem quite evenly matched following the first two practice sessions at the Korean International Circuit.
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Tick/untick drivers’ names to show their laps, click and drag to zoom
After a quiet first practice, Ferrari showed their hand in the second session and got in among the front runners.
As the track surface became cleaner and more rubber went down in the second session, lap times continued to improve, though not as quickly as in the first. That makes it tricky to pick which of the three top teams, if any, might have an edge.
Lewis Hamilton’s fastest time was bettered six minutes later by Fernando Alonso, who went a tenth of a second quicker. Five minutes after that Mark Webber found another tenth.
Alonso pipped Webber to the fastest time in sector two. Webber was quickest in the final sector. McLaren were the fastest of the three in the long first sector (though Renault were quicker still).
So although the top of the times sheets placed Red Bull ahead of Ferrari followed by McLaren, the pecking order might actually be the reverse of that.
However there is a clear split in straight-line performance between the three cars. McLaren are up near the top of the speed trap figures but both their key rivals were around 7-8kph slower in FP2:
1. Michael Schumacher, Mercedes – 316.9kph
6. Jenson Button, McLaren – 315.8kph
7. Lewis Hamilton, McLaren – 314.5kph
12. Sebastian Vettel, Red Bull – 307.9kph
13. Felipe Massa, Ferrari – 307.8kph
With two long straights following the first corner this has obvious implications for what could happen on the first lap.
The big question for race day is how much the changing grip levels will influence strategy. As we saw in Montreal, low grip can mean higher than usual tyre degradation. In Canada that forced many drivers to make two tyre stops instead of the usual one.
As the track surface rubbers in the rate at which the tyres ‘go off’ should decrease. During second practice we heard Nico Hülkenberg complaining that his tyres were “falling to pieces” and he was warned to expect the same in the race.
Looking at the lap times of drivers like Mark Webber and Lewis Hamilton from the end of the session shows how severe tyre degradation was. Instead of finding an incremental improvement in lap time as the fuel load came down their lap times levelled out or even rose.
Vettel had to use the soft tyres earlier than planned in second practice today as he picked up a puncture on his hard tyres. His first laps on soft tyres, much earlier than his rivals, was well off the pace they were setting on hard tyres.
Bridgestone expect that, come the race, the soft (option) tyre will be up to speed:
We saw a lot of graining on both compounds front and rear today. This is related to the dirty surface as the tyres cannot grip the tarmac properly.
This situation should continue to improve with the track surface evolution tomorrow. We expect that the option tyre should give a faster lap time and if the surface continues to improve it should have reasonable durability. How much durability depends on the track surface evolution so this will be the crucial question for the next two days.
Hirohide Hamashima
What happens to the track in final practice tomorrow will strongly influence what the teams decide to do on Sunday. Drivers who qualify in the top ten, of course, have to start the race using the tyres they qualify on.
In Montreal the Red Bull drivers started the race on hard tyres, expecting the soft tyres would go off too quickly in the early stages. But that gamble failed to pay off.
If any of the top three teams get the call wrong this weekend it could cost them dearly in the championship.
| Pos. | Car | Driver | Car | Best lap | Gap | Lap | At time | Laps |
| 1 | 6 | Mark Webber | Red Bull-Renault | 1’37.942 | 16 | 73 | 23 | |
| 2 | 8 | Fernando Alonso | Ferrari | 1’38.132 | 0.190 | 20 | 68 | 30 |
| 3 | 2 | Lewis Hamilton | McLaren-Mercedes | 1’38.279 | 0.337 | 19 | 62 | 29 |
| 4 | 11 | Robert Kubica | Renault | 1’38.718 | 0.776 | 17 | 66 | 28 |
| 5 | 1 | Jenson Button | McLaren-Mercedes | 1’38.726 | 0.784 | 16 | 88 | 19 |
| 6 | 7 | Felipe Massa | Ferrari | 1’38.820 | 0.878 | 20 | 62 | 32 |
| 7 | 5 | Sebastian Vettel | Red Bull-Renault | 1’39.204 | 1.262 | 8 | 48 | 22 |
| 8 | 12 | Vitaly Petrov | Renault | 1’39.267 | 1.325 | 15 | 62 | 28 |
| 9 | 4 | Nico Rosberg | Mercedes | 1’39.268 | 1.326 | 15 | 61 | 29 |
| 10 | 23 | Kamui Kobayashi | Sauber-Ferrari | 1’39.564 | 1.622 | 18 | 68 | 26 |
| 11 | 22 | Nick Heidfeld | Sauber-Ferrari | 1’39.588 | 1.646 | 19 | 63 | 25 |
| 12 | 3 | Michael Schumacher | Mercedes | 1’39.598 | 1.656 | 13 | 61 | 25 |
| 13 | 9 | Rubens Barrichello | Williams-Cosworth | 1’39.812 | 1.870 | 19 | 60 | 34 |
| 14 | 15 | Vitantonio Liuzzi | Force India-Mercedes | 1’39.881 | 1.939 | 16 | 62 | 25 |
| 15 | 14 | Adrian Sutil | Force India-Mercedes | 1’39.971 | 2.029 | 16 | 63 | 22 |
| 16 | 10 | Nico Hülkenberg | Williams-Cosworth | 1’40.478 | 2.536 | 14 | 59 | 30 |
| 17 | 17 | Jaime Alguersuari | Toro Rosso-Ferrari | 1’40.578 | 2.636 | 15 | 60 | 28 |
| 18 | 16 | Sebastien Buemi | Toro Rosso-Ferrari | 1’40.896 | 2.954 | 19 | 61 | 31 |
| 19 | 19 | Heikki Kovalainen | Lotus-Cosworth | 1’42.773 | 4.831 | 18 | 67 | 28 |
| 20 | 18 | Jarno Trulli | Lotus-Cosworth | 1’42.801 | 4.859 | 18 | 92 | 19 |
| 21 | 24 | Timo Glock | Virgin-Cosworth | 1’43.115 | 5.173 | 17 | 67 | 26 |
| 22 | 25 | Lucas di Grassi | Virgin-Cosworth | 1’44.039 | 6.097 | 21 | 73 | 29 |
| 23 | 20 | Sakon Yamamoto | HRT-Cosworth | 1’45.166 | 7.224 | 7 | 68 | 17 |
| 24 | 21 | Bruno Senna | HRT-Cosworth | 1’46.649 | 8.707 | 2 | 92 | 3 |
Ultimate laps
An ultimate lap is a driver’s best three sector times added together.
| Pos. | Car | Driver | Car | Ultimate lap | Gap | Deficit to best |
| 1 | 6 | Mark Webber | Red Bull-Renault | 1’37.936 | 0.006 | |
| 2 | 8 | Fernando Alonso | Ferrari | 1’38.132 | 0.196 | 0.000 |
| 3 | 2 | Lewis Hamilton | McLaren-Mercedes | 1’38.279 | 0.343 | 0.000 |
| 4 | 11 | Robert Kubica | Renault | 1’38.338 | 0.402 | 0.380 |
| 5 | 7 | Felipe Massa | Ferrari | 1’38.614 | 0.678 | 0.206 |
| 6 | 1 | Jenson Button | McLaren-Mercedes | 1’38.726 | 0.790 | 0.000 |
| 7 | 12 | Vitaly Petrov | Renault | 1’39.080 | 1.144 | 0.187 |
| 8 | 5 | Sebastian Vettel | Red Bull-Renault | 1’39.125 | 1.189 | 0.079 |
| 9 | 4 | Nico Rosberg | Mercedes | 1’39.233 | 1.297 | 0.035 |
| 10 | 23 | Kamui Kobayashi | Sauber-Ferrari | 1’39.564 | 1.628 | 0.000 |
| 11 | 22 | Nick Heidfeld | Sauber-Ferrari | 1’39.588 | 1.652 | 0.000 |
| 12 | 3 | Michael Schumacher | Mercedes | 1’39.598 | 1.662 | 0.000 |
| 13 | 9 | Rubens Barrichello | Williams-Cosworth | 1’39.812 | 1.876 | 0.000 |
| 14 | 15 | Vitantonio Liuzzi | Force India-Mercedes | 1’39.881 | 1.945 | 0.000 |
| 15 | 14 | Adrian Sutil | Force India-Mercedes | 1’39.887 | 1.951 | 0.084 |
| 16 | 17 | Jaime Alguersuari | Toro Rosso-Ferrari | 1’40.397 | 2.461 | 0.181 |
| 17 | 10 | Nico Hülkenberg | Williams-Cosworth | 1’40.426 | 2.490 | 0.052 |
| 18 | 16 | Sebastien Buemi | Toro Rosso-Ferrari | 1’40.815 | 2.879 | 0.081 |
| 19 | 18 | Jarno Trulli | Lotus-Cosworth | 1’42.724 | 4.788 | 0.077 |
| 20 | 19 | Heikki Kovalainen | Lotus-Cosworth | 1’42.773 | 4.837 | 0.000 |
| 21 | 24 | Timo Glock | Virgin-Cosworth | 1’42.896 | 4.960 | 0.219 |
| 22 | 25 | Lucas di Grassi | Virgin-Cosworth | 1’43.892 | 5.956 | 0.147 |
| 23 | 20 | Sakon Yamamoto | HRT-Cosworth | 1’44.904 | 6.968 | 0.262 |
| 24 | 21 | Bruno Senna | HRT-Cosworth | 1’46.226 | 8.290 | 0.423 |
2010 Korean Grand Prix
- Mercedes deny Massa held up Schumacher for Alonso
- Korea say 168,000 attended first F1 race
- Alonso not considering Brazil title win
- Hamilton: Alonso would have passed me
- Button: “I will fight until it’s impossible”
- Horner hits back over Webber criticism
- Korean International Circuit: your verdict
- Montezemolo: “We haven’t won yet”
- 2010 Korean Grand Prix: the complete F1 Fanatic race weekend review
- Who was the best driver of the Korean Grand Prix weekend? (Poll)
Image © www.mclaren.com




Alexi (@alexi) said on 22nd October 2010, 15:24
Looking good for an Alonso pole – I mean, Ferrari should not be running on max engine settings yet considering their situation, and they did it before.
Oh, and a very exciting race of course if it’s anyhting like Canada.
DaveW said on 22nd October 2010, 15:49
I have a feeling, kind of a sick feeling, that this thing will be decided before the apex of turn three. That track is not that wide, the walls are right there.
Webber is just not going to let Hamilton drive by even if he is closing on him like an artillery round into turn 3, as will be the case. Hamilton knows he absolutely must get ahead of Webber by turn 5 to keep his title hopes on. Same applies with regard to Alonso.
The scenario of two RedBulls fighting each other,with six cars bearing down on them at 10-15kph in their draft at 200mph is pretty chilling.
BBT said on 22nd October 2010, 20:40
Webber can afford to be hard nosed here. Looks like this is RBR weakest circuit of the last 3 races.
Rob Wilson said on 22nd October 2010, 16:27
It’s not chilling it’s down right exciting! I cant wait for this race!
Glenn said on 22nd October 2010, 17:00
This is the quintessential F-Duct Track. Who can keep their high speed advantage in Sector 1 while still having enough downforce to tackle Sector 2 & 3?
Oh and while I’m here did anyone else see Webber in FP2 and his 3 wheel action in the corners? I almost dropped my jaw when I saw that @ 1:30 in the morning. I have not seen them do that before, Camber in the track, perhaps but it was quite a sight to see.
Hallard said on 22nd October 2010, 18:45
I saw that too, with his inside front 3 inches off the ground!
I think that it was occuring because he was running a softer anti-roll bar in the rear (or a stiffer one in the front), to keep the oversteer to a minimum on such a slippery track. As the track rubbered in, oversteer wouldnt have been as much of a concern and they could stiffen up that rear anti-roll bar as needed, which might have been why we didnt see it on webber’s car later in the session.
At least that’s my hypothesis :)
RFB said on 22nd October 2010, 20:33
He actually had a problem with the anti-roll bar, it’s that simple.
HounslowBusGarage said on 22nd October 2010, 21:43
Broken rear anti-roll bar?
How did that happen?
Marcello said on 22nd October 2010, 17:12
Great article Keith
Dave said on 23rd October 2010, 1:21
Is the track really ‘low-grip’? The cars are already one and a half seconds faster than optimistic simulations (Mercedes, iirc), and 4 seconds faster than the more pessimistic simulation predictions (Williams, again, iirc).