Various webshops use the following names:
- Sachs Torpedo 3 gear
- SRAM T3
- SRAM i-motion 3 gear
There are many inconsistencies in what exactly they call them, and for a long time I thought it was exactly the same product, but now I know that at least Sachs Torpedo and i-motion 3 gear are different. I don't know how though, except that the shifter looks different, and the shifters are incompatible.
I don't know how T3 fits in, maybe it is the same as one of the others.
What are the technical differences between them? Any reason to buy one over the others? I am tempted to buy the Torpedo because I hope it will last longer, since family's bikes with Torpedo lasted forever in my childhood.
The webshop I'm buying from is selling both Sachs Torpedo and SRAM i-motion 3 gear, I asked them for the difference, but they were not really helpful.