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Attn Brainiacs: Dura-ace FC-7700 vs 7701?(5 posts)

Attn Brainiacs: Dura-ace FC-7700 vs 7701?ekdave
Feb 7, 2003 6:21 AM
can any techno-smart people tell me what the difference is in these dura-ace carnaksets? Both are 9 spd, both use 109.5mm axle, same spline, etc.

I neeed new cranks, am seeing both of these advertised.

re: Attn Brainiacs: Dura-ace FC-7700 vs 7701?InTheMiddle
Feb 7, 2003 6:51 AM
as far as I know the only difference is the 7700 is geared toward time trials... shipping with:

"Triathlon Specific Chainrings: 56-42, 55-42, and 56-44 chainring combinations available for triathlon and time trial competition. "
re: Attn Brainiacs: Dura-ace FC-7700 vs 7701?MR_GRUMPY
Feb 7, 2003 7:15 AM
Both stabdard dbl. and triathalon dbl cranks are called 7701. Triple cranks are 7703, and track cranks are 7710.
I think that 7700 cranks, if they ever existed, were the original. Check out
re: Attn Brainiacs: Dura-ace FC-7700 vs 7701?Mike Prince
Feb 7, 2003 1:28 PM
This question came up last year on the boars (like you I am too lazy to do an archive search to locate the thread) and it is a difference in manufacturing process. 7700's were made in a 1-step forging process to create the hollow crank arms and the 7701's are welded at the end in a secondary process to close off the end of the crank arm. Undoubtedly saves Shimano some $$, allowing for either higher margins or lower prices (we all know which way this goes).

I have 7700's on one bike and 7701's on another and cannot tell the difference.
thanks! nmekdave
Feb 7, 2003 2:40 PM