[Newbie101]

hello all, havent posted on here in a long time.

its been 6 months since my last service, where they replaced the front passenger side tyre as it was bordering on the legal limit of tread. but now the 'new' tyre has alot less thread than the other 3.
The thread on the actual tyre is fairly even, just not consistant with the rest.

the tracking and alighnment are correct and cant think of anything that could be causing this. any ideas??