Zipp Vuka aero bars 25mm clamp?

Triathlon Forum
1

Hi

Does it seem right that a set of zipp vuka aerobars require a 25.4mm stem clamp? If so, anyone know what age this would have been from approx?

Does a “shim” work, or would that cause the bars to slip?

Thanks

2

I can’t answer your first question, I’m afraid. My Zipp Vuka bars are oversize fitting.

But as for the second question, I would never use a shim on handlebars. The potential for serious injury if it slips is just too great.

Only a few days ago, I hit a pothole on a descent on my TT bike - therefore, at speed - and my aerobars (clip on) slipped just a tiny bit. It was sufficiently terrifying to cause me to get the torque wrench out again and make sure they were tightened to the max.

3

What age are your zipp vuka aero bars from? Are they the integrated type or the bull base bar with clip ons?

Thanks

4

They are pretty new - only used about six times so far, which is why they weren’t fully tightened up (stupidly) - but they are the bul base bars.

Very nice kit, I have to say.

5

Did you actually measure the 25.4 with a set of calipers?

6

26.0. Shim to 31.8. They come with shims.

I ran the shims for years, as 26.0 stems aren’t easy to come by, and never had an issue.

7

You need to shim the Vukaaeros. The Zipp store has them, been using one for years without issue