Dura Ace 9 Speed TT chainring compatibility (7400/7800)

After looking for a 9 speed dura ace TT chainring for some time, I just managed to get one on eBay for a normal price, 54t, showing some signs of wear for £30.

Does anyone have any experience in fitting one of these rings to a 7400 8 speed chainset? I understand they fit the 7800 10 speed setup as well.

Any tips appreciated

Cheers all

3 Attachments

7800 evidence

2 Attachments

These are lush always wanted one, all the cranks are 130bcd I think and 8/9/10 speed chains are the same width I think? Are 10s maybe narrower overall but the same inner width? Yeah it’ll work fine. If it doesn’t I’ll buy it

Lovely, thank you! Got either 8sp or 10sp chainsets I can use it on. Prices are generally mental on these for some reason!!

Looks a bit wrong on 7800 due to the fatter spider arms, but should look mint on 7400, probably even look better than on 7700.

Cheers for that. Never ventured into 7700, not sure if it’s a reasonable price or bonkers like the rest of dura ace kit

Bit of a mixed bag with prices on 7700, is this 7700 all octalink??

My brother rides it on a 7700 crankset (i think square taper, not octalink iirc)

BUT he runs it 10 spd, ie with 7900 shifters and cassette (and 7700 RD) and works perfectly fine

1 Attachment

7700 is all Octalink, 3 different BBs for track, road and triple. The DA ones use needles as well as balls if I remember right.

The crank arms were a very pretty evolution on the previous generation, and Dura-Ace was the first to be hollow (again, iirc - I think the arms were forged in a C section and the back welded on at first before they figured out how to do them in one piece).

The major bummer about 7700 cranks is that they weren't anodised! What suckage. Stupid clearcoat instead. Although I suspect the 25th anniversary special edition ones were proper.

This is excellent detail, thank you!

This looks lovely 👌🏻

Got my eyes open for the 7900 shifters, prices are silly now