Purchased Two front tyres @ Halfords as they where cheap for a mid to premium tyre and had £20 Argos voucher attached.
When I checked tyre tread depth found only 7mm middle and 6.5mm outer edge.
Never had a new tyre under 8mm before, alway 8 to 10mm.
May be that's why there cheap!
Will contact Firestone to see why.