Anyone convert a Dura-Ace 7800 crank into Compact gearing?
#1
South, Central Pa rider
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Anyone convert a Dura-Ace 7800 crank into Compact gearing?
I’m curious to hear anyone’s thoughts on converting a Dura-Ace 7800 crank into compact gearing (50/34). I see Shimano made a D/A, 7800 50T outer chain ring and 34t inner, Ultegra 6600 ring… I realize Shimano’s official position would speak against using both with their 7800 double, front derailleur – but I’m curious to hear opinions please.
I really like the 7800 crank I have now and I read Shimano’s claim that the new 7900 compact isn’t compatible with 7800 components (other than the Bottom Bracket).
I guess I could buy the D/A 50T and a 6600 Compact crank, switch the outer rings, wipe off the Ultegra lettering & sharpie Dura-Ace… but I doubt anyone will buy that.
Thank you,
Trent
I really like the 7800 crank I have now and I read Shimano’s claim that the new 7900 compact isn’t compatible with 7800 components (other than the Bottom Bracket).
I guess I could buy the D/A 50T and a 6600 Compact crank, switch the outer rings, wipe off the Ultegra lettering & sharpie Dura-Ace… but I doubt anyone will buy that.
Thank you,
Trent
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yes to an extent, I used a 50 t ring with a 39 and I liked it but I finally went with a compact 50/34.
My preference with shmano would be a 50/36 if they made compact ring of 36 because to me the 50/34 is too much of a drop.
I like the 50/34 though and it has helped cut down on my arthritis flare-ups in my knees due to more spinning, than hammering
My preference with shmano would be a 50/36 if they made compact ring of 36 because to me the 50/34 is too much of a drop.
I like the 50/34 though and it has helped cut down on my arthritis flare-ups in my knees due to more spinning, than hammering
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I’m curious to hear anyone’s thoughts on converting a Dura-Ace 7800 crank into compact gearing (50/34). I see Shimano made a D/A, 7800 50T outer chain ring and 34t inner, Ultegra 6600 ring… I realize Shimano’s official position would speak against using both with their 7800 double, front derailleur – but I’m curious to hear opinions please.
What may not be compatible between 7800 and 7900 is shifters and RD as the pull ratio is different from what I hear. But even that doesn't seem to matter with front shifting. My Ultegra 6600 FD shifts the DA7950 compact just fine. I didn't even have to adjust it when I took the Ultegra compact crank off and replaced it with the DA7950.
Originally Posted by HAMMER MAN
My preference with shmano would be a 50/36 if they made compact ring of 36 because to me the 50/34 is too much of a drop.
Last edited by scirocco; 07-17-10 at 06:15 PM.
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