Searching for help with vibration

[quakerboy]

I have an almost new bike (24 speed Hybrid). And I am noticing several vibrations and things. Some I can live with. The front fender is noisy, ok.

But as I pedal I feel a vibration each down stroke. Its the same no matter what gear I am in. This is really disturbing me. All I can think of to make this happen is something wrong in the crank, which seems alarming to me.

Then, when I get into upper gears, say the largest chainring and the 2 smallest rear cogs, I get a new and alarming noisy noise. Only while pedaling.

anyone have any helpful ideas for me?

[Kennah]

1. LBS purchase?

[quakerboy]

2. Indeed

sorry about the slow response

[Kennah]

5. Stuff can rattle loose, and cables stretch

After a month, it's best to have the LBS give it a good going over. Then perhaps after another 3 months.

Beyond that, it depends how much you ride.

[frylock]

3. when I get into upper gears, say the largest chainring and the 2 smallest rear cogs..

possible cause is chain rubbing against front derailleur?

[quakerboy]

4. I think I have figured it out

I think that it has something to do with the chain tension as I pedal at certain speeds. I test drove another new one, different brand similar style, and it has the same vibration in the same way.

[wtmusic]

6. Sounds like your derailleurs need adjustment.

They can be finicky beasts, and the cheaper ones are almost impossible to dial in perfectly.

What kind of bike/components do you have?