bad vibration when sprinting

chatlow
chatlow Posts: 850
edited April 2015 in Workshop
Have a specialized tarmac sora 2014. All parts are in v good condition. Been riding past two weeks without any problems, in fact it's been a dream. All of a sudden I went out tonight and whenever I get out of the saddle and give it some power there is a harsh vibration coming from the front. Can feel it a lot in the handlebars and can hear it too. Doesn't happen when sitting down and I can't get it to happen when out of the saddle on the trainer, so just a road thing.

Front tyre was a little low - hoped it was that, but pumped it up and was exactly the same around the block.

Gave her a good clean a few days ago but can't see how that would have caused it.

Any thoughts on what it could be? Headset seems very secure and tight, brakes aren't rubbing...


I'm stumped!

Comments

  • dgunthor
    dgunthor Posts: 644
    first thought would be loose headset, second would be loose front wheel bearings - any movement side to side in the front wheel when you grab it at the tyre and wiggle?
  • chatlow
    chatlow Posts: 850
    thanks, yeah i was thinking that after worrying that it was BB related. I have since arranged the cabling a little better at the front and removed and re-tightened the front wheel. Went out and it seemed good, but will try again later. Vibration/rubbing was in both big and small rings.

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