Computerised wheel alignment
If you hear a knocking noise then it may be an issue with your lower wishbone arms, which are part of the suspension. Please don't forget most modern cars have rear alignment too, so check the rear tyres on the inside edge. Most family size cars like Ford, Vauxhall and VW will have rear wheel tracking.
At Buckingham Tyre & Exhaust we offer free shock absorber checks and free checks for wheel alignment using a computerised four wheel alignment gauge; as well as performing suspension and geometry checks.