Bought a used roadbike for my trips to the Alps with an Ultegra 6600 rear derailleur and a 12-25 cassette. I found the gears to be too hard this summer on steeper gradients so looked at options to fit a bigger cassette.
Thanks to this forum considering all the available options I ended up fitting a MTB 9-speed derailleur to match my 10-speed 6600 road shifters (same cable pull ratio!).
The shifting works well enough and it can easily take the capacity of the 11-34 cassette even with a triple chainring. I am very happy and thankful to all the advice I got here!
by Fabio290
4 Comments
Derailleur model: RD-M592-SGS
Now got a 52-11 for the descents and a 30-34 for the climbs!
Can’t say it’s stupid when it works. Good work!
Hey, thanks for sharing. That sounds as though you have achieved a great outcome for your needs.
I would expect to see your post killed pretty soon, as r/bikewrench is pretty strict about the “repair questions only” rule – but I’m not reporting it!
Hah, looks like a bit overkill having a triple and such big cassette, but I’m glad you like it =) So much wider range ans much smaller gear gaps than on those fancy modern 1x transmissions and without stupidly large cassettes.
I did kinda opposite thing on my gravel bike. Having 2X chainring there was 11-36 cassette and Alivio deraileur. I wasn’t happy with the weight of the cassette and shifting. Changed cassette to Stam PG-980 (11-34) which a bit reduced gear ratio but the cassette almost twice lighter and much more stiffer and most importantly installed a Sora deraileur with a short cage. Surprisingly it works really well, cage is enough for such big cassette and 2X chainring, tho it rated to work with max 32t cassette, lol