N/S wheel bearing???????

[Steveo_A3_1.8t]

i have this knocking/grinding (mostly knocking) from the nsf on my car at low speeds/crawling traffic, and have had the car up in the air several times and checked ARB droplinks, recently fitted powerflex wishbone bushes, CV joints and both inner and outer are fine (n/s is a new shaft) and all else is well, i checked the wheel bearing by way of the 12 an 6 oclock grip and check for movement trick and i cant feel any movement. could it be a bad bearing even thou there is no obvious movement???

cheers​