Do R7000 105 rings ...
 

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[Closed] Do R7000 105 rings fit R8000 ultegra cranks?

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Posts: 2018
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Yes, one's black and one's dark grey. But I need new rings, want 50/34 rings and a 105 crankset costs less than new ultegra rings. Especially if I buy very short cranks (which I can if I don't plan to use the crank arms).

And 50T rings are out of stock everywhere.

Can I buy 105 cranks and fit the rings to my ultegra cranks?


 
Posted : 08/05/2021 8:47 pm
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Why not just fit the new 105 cranks and sell your ultegra?

Depending how old your ultegra is, 105 might not be a lot different. Plus the new one comes with 2 year warranty.

I'm probably wrong but I seem to remember the crank arms are a similar weight and they weight saving was on the chainrings.


 
Posted : 08/05/2021 9:07 pm
Posts: 2018
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Mostly because the ultegra ccranks match the rest of the group, and next time the rings are in stock I can get the next set, hopefully this stock shortage will not be endless!

Plus I can get the cranks cheapest in short lengths that I don't want to ride!

I don't mind the rings being a different colour til next time I wear them out, it I don't really want the cranks to mismatch forever. I keep bikes a long time.

I just want to know if they fit.


 
Posted : 08/05/2021 9:25 pm
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One of the bolt arms nearest to the arm is a different shape and will not match up with the other chainring. May work but there will be a mismatch.


 
Posted : 08/05/2021 9:46 pm
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Yes, they fit.

(well R8000 fit R7000 crank arm so presume it works the other way)


 
Posted : 08/05/2021 9:48 pm
Posts: 2018
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Topic starter
 

Thanks chaps. Still undecided, but good to know


 
Posted : 08/05/2021 9:53 pm

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