Whilst riding the TT bike the past few weeks I'd noticed a 'thump-thump' from one of my tires. Felt like I had a piece of gum stuck to one of the tires so on every rotation I would get a steady 'thump-thump-thump' on each revolution. I couldn't figure it out. And I had been too busy to hit the bike shop to have them look. It was really bad during the event this past Sunday.
I'm running tubulars, ZIPPS with a rear-disc. I had to put an end to the mystery so I hobbled to the bike shop Monday. Soon as we hoisted it up on the rack it was plain as day. It was a defective tire. One area was sort of flattened out. So, the bike is in the shop as they swap out the tire.
And that will be that.