thanks mate.A worn bearing will cause a droning noise almost like a drumming whiring at the speeds you suggest, above that the wind noise supersedes it. However, it doesn't explain the pulling to the left. That's either wheel alignment, camber, castor,bent or worn lower wishbone arm and bushes, uneven tyre pressure or irregular wear on the tyre. The latter you have now eliminated.
Ask for re-checking on 4 wheel laser alignment and double check correct tyre pressure but leave the tyres in their new positions. Post the figures mate
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