I think the Russian Team as a whole will be points ahead of everyone else on this apparatus. the top 2 should be Viktoria Komova annd Anastasia Grishina. The rest of the team are also good on bars and are worthy of the bars final if one of the top 2 messes up in qualification: Anastasia Sidorova (D Score: 5.40), Maria Paseka (D Score 5.80) and Violetta Malikova (D Score: 5.90).
Although it will be close I think Komova will win ahead of Grishina but either way they are both excellent on this piece and have start values of 6.50:
One of the best routines I have ever seen Komova do is available here
Even though the Romanians are not strong on bars I still expect Larisa Iordache and Diana Bulimar to make the final, they have improved on this piece and apart from the russians, bars is a weak piece in Europe for everyone. Of the 2 I prefer Iordache's line and she has more difficulty:
Others who have a good chance of making the final include:
Andrea Foti (ITA): She has a D Score of 5.60 and she has been hitting consistently this year.
Sara Catanzaro (SUI): D Score 5.60. She has some execution errors but there is potential if she can put it all together.
Rebecca Tunney (GB): D Score 5.50. This is more of a hopeful choice as she has potential on this event but is really inexperienced, but I'm hoping at least one Junior from the home team can make a final. She is from the same club as Beth Tweddle but with a different coach.
Julie Croket (BEL): D Score 5.40. She is a real talent, this is not her best event but she still has a chance to make the final if she can handle the pressure.
Mira Boumejmajen (FRA): D Score 5.50. Another stylish gymnast from France who has soke really great skills in her routine.
Maria Livchikova (UKR). She is also lacking experience but I really like her and recently at the Zakharova Cup she performed well woth good execution.