The originally cast iron cylinder block and head soon were replaced with a light alloy cylinder head with special airways to improve cooling and austenitic iron valve seat inserts.

The external oil feed pipes were also replaced with internal oilways via the pushrod tubes.

[1] By 1959, the Tiger 110 was eclipsed by the dual carburettor Bonneville T120 as Triumph's fastest model.

The Tiger 110 then received the enclosed panels of the Twenty One which, resembling an upside-down Victorian slipper bathtub, earned the bike the nickname 'bathtub'.

[2] On 6 September 1956, at Bonneville Salt Flats American racer Johnny Allen secured the motorcycle land-speed record on a heavily modified Triumph T110 with a top speed of 214.17 mph (344.67 km/h).