Ultegra 12s Di2 parts compatibility

[Seph]

Hello. Regarding the group set, there is any crankset and cassette that i can use with it?
Shimano claims only Ultegra and durace are compatible with the group, is that true?



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[Ritxis]

Hello. Regarding the group set, there is any crankset and cassette that i can use with it?
Shimano claims only Ultegra and durace are compatible with the group, is that true?



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I have a Chinese Wuzei cassette, Sram cranks with Miche chainrings.....perfect

[rainerhq]

Sry, I can´t belive its perfect. All those names already sound trouble.

[Ritxis]

Sry, I can´t belive its perfect. All those names already sound trouble.

Well, you can believe it.......I use the cheapest 12 Shimano chain

[Seph]

Never heard of wizei before.
So are you telling me any 12s cassette should work fine?


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[Ritxis]

Never heard of wizei before.
So are you telling me any 12s cassette should work fine?


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at least the one I have and from other experiences in a Spanish forum, they are going well.....at least in the short/medium term.....the Wuzei are light, not as expensive as the S-Road cassettes

[Seph]

Never heard of wizei before.
So are you telling me any 12s cassette should work fine?


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at least the one I have and from other experiences in a Spanish forum, they are going well.....at least in the short/medium term.....the Wuzei are light, not as expensive as the S-Road cassettes

Do you bought from AliE?

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[Ritxis]

Never heard of wizei before.
So are you telling me any 12s cassette should work fine?


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at least the one I have and from other experiences in a Spanish forum, they are going well.....at least in the short/medium term.....the Wuzei are light, not as expensive as the S-Road cassettes

Do you bought from AliE?

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Yes, in Aliexpress 11-32 ratio, in cranks 48-33 Miche chainrings

[milanv]

Hello. Regarding the group set, there is any crankset and cassette that i can use with it?
Shimano claims only Ultegra and durace are compatible with the group, is that true?



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And across the internet do you see only complete Shimano groupsets on bike builds?

[Seph]

Hello. Regarding the group set, there is any crankset and cassette that i can use with it?
Shimano claims only Ultegra and durace are compatible with the group, is that true?



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And across the internet do you see only complete Shimano groupsets on bike builds?

That's the reason I made the tread. I was thinking some parts may are more compatibles than others.
For example i see a lot of rotors crank.


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[harblhat]

The Shimano 12s cranks shift much better than the Shimano 11s cranks when using a 12s FD. Chainring spacing is closer with 12s rings.

[Seph]

The Shimano 12s cranks shift much better than the Shimano 11s cranks when using a 12s FD. Chainring spacing is closer with 12s rings.

Yea i know but seems the Shimano cranks are easy to break.
The alternative cassette i need for my trainers.

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[Jaisen]

The Shimano 12s cranks shift much better than the Shimano 11s cranks when using a 12s FD. Chainring spacing is closer with 12s rings.

Yea i know but seems the Shimano cranks are easy to break.
The alternative cassette i need for my trainers.

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The rotor cranks can be used with the Shimano crankset rings, the only issue is the rotor chainline is 43.5 mm and the new 12s Shimano chainline is 44.5mm. I don't know if it is possible to use a spacer either on the crankset at the BB or at the rear cassette to compensate, but if so that might be a possibility. Also, leaving the stock 43.5mm chainline for the rotor cranks will work relatively well but if you want the exact same shifting as with Shimano cranks, I think you need to use their rings and have exact chainline measurements, which will be hard to source third party.

As for Shimano crank durability, I think I heard some people mention the 105 cranks don't have the same issues with the bonding and corrosion as the Ultegra and Dura Ace cranks have, so that is another option.