Well this was an interesting exercise.
As I happen to have three different fuel tanks for the Triumph T20 Tiger Cub, I thought I would just show some images of them together for comparison.
The dark maroon tank is the early so-called “Trials” tank. It’s much slimmer than the others and has a similar profile to the silver / blue “Sports” tank. The underside of the Sports tank is similar to the “Humped” tank which was the final tank for the Cubs. The later T20B, or Bantam Cub, used a BSA Bantam fuel tank.
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