I've taken on trying to nurse my husband's bike back to life.
It is a 2012 Specialize Venge with Dura-Ace Di2 (very old version); Specialized pro FACT carbon chain rings, Ultegra 10-speed cassette.
It was "repaired" by someone who changed the front chainrings to something that, with a little reading, is incompatible and incorrectly fitted and hasn't worked well since. It also has new Ultegra cassette. I've decided to change chainrings to the Praxis Works Buzz, I now have a couple of questions
- Will the Ultegra cassette work with the Praxis chainrings?
- If yes, will an Ultegra chain be okay or should I use the Dura ace?