Does it need balancing?

I once got a set of bike tyres fitted at Cambrian Tyres in Aber - very famous suppliers and fitters to bike race teams. They didn't balance the tyres - when queried, they said they didn't bother as it made little effect on the ride.

I can understand the need for the front tyres as they'll need to be as equal to each other as possible, but as the rear is in the central line, the same principle may apply as with bike tyres?

"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10