Shimano sells different chainrings for double and tipple cranksets, same number of speeds . Are they really that different? Can you interchange them and work fine?
Tripe vs double chainrings
- Thread starter Cyckelgalen
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That's a good question.
I wrote about chainring sizes (what to look out for when swapping) here:
https://bike.bikegremlin.com/8326/chainring-standards/
To answer the question more directly:
For as long as you match the number of holes and the BCD (so that the chainring can be mounted), it can work.
Will it be ideal? It depends on the particular combination and your criteria.
For example: middle chainring of a triple has ramps on both the inner and the outer side to aid shifting. A double chainring, on the other hand, has ramps only on one side (because there is no middle chainging on a double, of course).
Likewise, there are minor spacing differences between chainrings for fewer speeds compared to chainrings for more speeds.
Still, I would say that it works when the BCD (and the number of mounting holes, of course) is aligned.
Relja
Thanks Relja,
Yes I thought of the ramps and the machining of the chainrings. But that would apply only to the middle ring of a triple, and I believe they sell all chainrings as 2X or 3X specific.
Then again, a lot of combinations that Shimano doesn't recommend work in real life.
The maximum capacity id rear derailleurs is a good example.
Yes I thought of the ramps and the machining of the chainrings. But that would apply only to the middle ring of a triple, and I believe they sell all chainrings as 2X or 3X specific.
Then again, a lot of combinations that Shimano doesn't recommend work in real life.
The maximum capacity id rear derailleurs is a good example.