Your tube’s description says that “This set is recommended for Nikon F mount/Pre-AI (Non-AI) lenses over 55mm. It provides continuous focusing from 1:2 to 1:1 reproduction.”
There are two mentions that ring my bell:
- lenses over 55 mm
- 1:2 to 1:1 reproduction
Your lens is 55, not over, but I suppose that this does not matter. Reproduction is advertised between 1:1 and 1:2. What you need is 1:2.5 which is out of range - as you already noticed.
Does your lens go to 1:2 without the tube?