they've turned out to be Hollowtech
The triples? I can see the crank bolt...
Either way, surely it's worth getting some 6400 to complete the group.
They're probably 5500, so Octalink (which I guess is Hollowtech 1). 6400 would look lots better, I agree.
so Octalink (which I guess is Hollowtech 1)
Ah! I didn't know that.
@slothy started
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The triples? I can see the crank bolt...
Either way, surely it's worth getting some 6400 to complete the group.