I always bed new tyres in for a hundred plus miles. The only time I've had TTracs lock was when an oncoming idiot (probably on the phone - ladder on roofrack of estate car) decided to make a right turn across my path.

Graham (G4FUJ)

Sold L44FOR 4/4 Giallo Fly
'09 Gen2 MINI Cooper ragtop
'90 LR 90 SW