Understanding WTAC: Tyres

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World Time Attack Challenge is running on a Yokohama ADVAN control tyre across all classes. This provides a fair and even playing field and prevents any team from getting a “special treatment” as all tyres are ordered in bulk and available to all team.

All teams have to complete a tyre pre-order form ahead of the event and the tyres are supplied directly by Yokohama. There are no “special” tyres or “special” orders. Teams can choose any combination of soft or medium compound tyres within their class quantity and size restrictions.



All tyres are marked by WTAC staff during scrutineering. There are random checks throughout the event and the top five cars in each class is inspected closely by WTAC eligibility scrutineers prior to any trophies being issued. Any car found to be using any tyre other than its specified control tyre is disqualified.



Clubsprint Class
Control Tyre: Yokohama Advan Neova AD08R
Maximum Tyre Allowance: 8 tyres.
Maximum Tyre Size: AWD – No wider than 265 (unless otherwise specified by the manufacturer for that particular vehicle). 2WD – no wider than 295 (unless otherwise specified by the manufacturer for that particular vehicle)

Open Class
Control Tyre: Yokohama Advan A050 (soft or medium compound)
Maximum Tyre Allowance: 12 tyres.
Maximum Tyre Size: 295 (the widest tyre size available in AO50)

Pro Am Class
Control Tyre: Yokohama Advan A050 (soft or medium compound)
Maximum Tyre Allowance: 16 tyres.
Maximum Tyre Size: 295 (the widest tyre size available in AO50)

Pro Class
Control Tyre: Yokohama Advan A050 (soft or medium compound)
Maximum Tyre Allowance: 24 tyres.
Maximum Tyre Size: 295 (the widest tyre size available in AO50)



Yokohama Advan Neova AD08R
Features:

• Micro Silica 2 – Orange Oil Compound grips road, resists deformation, heat and wear.
• Racing Tread Pattern – Increase Rigidity.
• Steel Sidewall High performance in cornering, braking and on dry tracks.
• 8mm Tread Depth – 180 Treadwear UTQG Expect reasonable tread life.
• Widely Available and Not just Motorsport.

Ideal for racers and car enthusiasts with highly tuned cars who use their car on the street and the race track and want one tyre to do both duties. Capable of very quick lap times.
The Neova AD08R tread design is the same as the AD08 but the “R” tyre compound provides more initial grip and improved handling. The rubber compound has more carbon, for dry grip; more silica, for wet grip and Yokohama’s Orange Oil tyre technology.

Yokohama Advan A050
Features:

• Heats Up Quickly.
• Excellent Wet Grip
• Durable Heat Cycles
• Consistent and Forgiving

Ideal for racing use where fast lap times and consistent performance is of utmost importance. The A050’s stable and linear steering characteristics come in part from its high rigidity bead wire, which links the tyre carcass to the wheel, it squeezes the rim tightly and helps reduce energy loss when cornering, braking or accelerating.