The MG TB was available from May of 1939 as a improvement on the earlier TA which had been in production for 3 years. Externally the TB had minor differences, but the main difference was the newly designed larger bore and shorter stroked 1250cc XPAG engine, designed for strength and performance potential. The TA was also fitted with the new synchromesh (on tyhe top 3 speeds) gearbox from the VA. The new TB was hardly in production before the war broke out 4 months later. Post war, when MG picked up with car production with their T series, this prewar TB model was the basis for the new TC.

All prewar MG's had wheels with their spokes going to the outside of the wheel rim, but it was part way through the MG TB  production that this changed to a wheel that had the spokes going to the middle of the wheel, into the well of the wheel rim, no doubt to strengthen the wheel or vary the offset. This different wheel was introduced from chassis number 1249, and same wheel was used post war when MG built the postwar version of the TB, which was called TC. So remember if your MG TB has these later wheels you will need to fit a rim band which helps protect the inner tube.

MG TB tyre size was originally 450x19 , and Blockley produces the best quality tyre you can buy - see full details of this exceptional tyre below:

Blockley Products for MG MG TB

450 x 19

Blockley Triple Stud Crossply

£119.00 (£142.80 inc. VAT)

18/19 inch Rim Band (45mm wide)

Blockley Rim Band

£3.30 (£3.96 inc. VAT)