Front Forks - all models

​​All Terrier forks are simple grease-filled items without any damping whatsoever, but due to the machine's light weight they work satisfactorily with the exception of when the weather turns cold.

The grease thickens and the fork action can become very stiff.

The first Tiger Cub T20 models (1954-1956) carried on using the grease-filled forks fitted to the Terrier, but for the 1957 model year a new hydraulically damped front fork assembly was fitted.
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Be aware: the early grease-filled stanchions are not interchangeable with the hydraulic fork ones. The early stanchions are 0.010 inch larger in diameter.

Basically three types of hydraulic front forks were fitted to the Tiger Cub depending on the model - lightweight, lightweight (Bantam Cub) and heavyweight (from the 350/500 twin-cylinder Triumph models but with shorter stanchions and lighter springs).
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The T20C (1957-59), T20CA (1958-59) used lightweight forks fitted with 1 inch longer stanchions tapered to fit into reinforced yokes.

From 1965, selected off-road orientated models were fitted with heavyweight forks which had the springs outside of the stanchions.

​Note: the heavyweight forks fitted with external springs take an extra 50cc of oil each leg - 200cc rather than the 150cc of the internally sprung type.
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Lightweight forks (Cub and Bantam) - 75cc per leg.

Bantam Cub (and Bantam Super Cub) forks are the same internally as the later lightweight T20 Tiger Cub forks, the exception being the Bantam Cub stanchions are 1 5/8 inch longer.

​Lightweight Tiger Cub forks
(oil-filled)

​Heavyweight forks

​Bantam Cub
Lightweight forks