Recommendation: This is by far the best of the Avid G series, but unfortunately is very picky about conditions... This is a good stock rotor but I would suggest upgrading to new rotors ASAP. There are many great options available.
Pros: - Awesome stopping power
- Good response
- Look sleek and unneeded material is cut away
Cons: - A little thin and bend without too much trouble
Recommendation: A superb rotor that will stop you dead in your tracks. When paired with a proven quite brake the discs are silent. I have had great success in terms of noise and performance with Avid Juicy 7's and Shimano SLX brakes. Friends of mine running Elixirs sound like a herd of turkey's coming down the trail. Just some food for thought.
I do agree that they are a bit on the thin side and tend to bend very easily. I haven't found that affects performance or wear but it is something to consider if you're hard on your gear or if you're riding in rough terrain. Extra care during storage should also be taken.
With the release of the new Avid HS1 rotors the G2s do look a little dated. Granted this means that you should be able to find a pair of G2s for even cheaper; which makes them even a better deal!
Cons: -Noisy as hell
-Do not work well with any other brands' calipers
Recommendation: Not a fan of anything Avid and these rotors are no exception to that. They squeal constantly, are more thin than most other brands' rotors (which equates to faster wear), and because of their lacking thickness, they do not work well with other brands' calipers. Skip these.
Cons: This rotor squeals like a pig when on the rear wheel. Works great on the front wheel. A lot of other owners have reported the same problem to Avid and they say there is nothing wrong with the product. Bike shop owners recomend trying a different rotor.