 Tyres play a huge part in rallying and here in the east coast bullbars Australian rally championship we have a control tyre provided by Kumo, but there's not just one size or compound for that matter, Dean Herridge has some tips on what's used where over the weekend. I'm inside the Kumo tyre truck at the service park here, there's a mountain of tyres behind me, so many, and would you believe they're not all the same, we've got compounds to choose from, obviously also sizes, lots for our teams to think about, you know the crews, the drivers and co-drivers to strategise their way through the weekend. Earlier on we heard from Duncan and talk that this rally of Canberra is almost played out in two parts, the Saturday stage is being in the Cowan Forest, very rough and stony and rocky, really hard on the tyres and the cars for that matter and then obviously Sunday is going to be in the west side of the city, smoother, sandier base, more technical style of road, so how do you best work your compound and tyre sizes out, mediums or hards and obviously we've also got the sizes like I said, so a 195 here you can see on your right and if I swing it across to a 205 as a choice, you can see it's about half an inch wider, why would you go for a narrow tyre or a thicker tyre or a wider tyre? You're basically going to use a narrow tyre to try and bite through the surface for your first passes, less tyre on the road meaning you have a bit more feel and grip through the course. On the second pass when it swept you want a wider tyre, giving you a maximum grip, the problem is with only 16 for the weekend, how do you manage all those numbers? Is anyone's guess?