ContiTrail Attack - DL1000 - oscillation in handlebar

[mattee76]

Hi,

I had a pair of ContiTrail Attacks put onto the bike last week, I notice that the bike now has a moderate ossilating effect in the handle bars below 30mph, they also feel pretty spongy when riding. I previously had the RoadAttack and notice no issues. Have tried with recommended PSI, +2,+4 PSI front rear, no difference.

What are other people experiences with these tyres? Any ideas how to resolve the issue?

Thanks
Matthew

[73bm73]

This oscillating effect is called shimmy.
And the CTA is known for this shimmy effect. About 95% of the CTA tyres have shimmy. Also the Road Attack (CRA).
The good news are, shimmy is not dangerous, only  

[mattee76]

Hmm, interesting, how can they sell these tyres if they have this effect?

Oh well, as long as it is not dangerous, I can handle the shimmy.

[73bm73]

Hmm, interesting, how can they sell these tyres if they have this effect?

Oh well, as long as it is not dangerous, I can handle the shimmy.

It depends a little on the production plant/country. France, Corea or anywhere else. Corean are worst. They know about this effect but they won't do anything against it. I avoid to buy Conti...

[Sven]

Have them on my 650 & never had a problem. Excellent tyres
Bumhead has them on his 1000 & rates them very highly as well.
   Tyres are very personal items - what one person loves, someone else hates!!!

[FisioRob]

Have them on my 650 & never had a problem. Excellent tyres
Bumhead has them on his 1000 & rates them very highly as well.
   Tyres are very personal items - what one person loves, someone else hates!!!

Couldn't agree more! Got them on my Wee and not looked back since (except when pulling out and doing lifesavers!)  

[mattee76]

Oh god, on my bike they are absolutely terrible. I would have hoped they would become more bedded in during he first 100miles, but they have'nt.

I am going to take the bike back and see what the deal is.

Out of couriousity, what PSI do you run them on?

[Eric The Viking]

Had them fitted on my Vee a few weeks back, no problems, solo or two up at whole range of speeds & conditions.  Make sure they're balanced up properly and correctly seated on the rims.

[mattee76]

Hi,

Would you blokes mind telling me what manufacturing batch the front tyre is please.

Mine is stamped 1410 (14th week 2010).

I am getting the tyre store to fit a new front tyre from a different batch, "maybe" that will fix the issue.

Thanks
Matthew

[Sven]

Hate to tell you this , but mine is stamped 1410 as well (front).
& 3709 on the rear.
Hope you get it sorted soon.

[mattee76]

I am going to take them off and get them to fit some Bridgestone BW501/502.

Will get the CTA's sent back to Conti and they can check to see if there are any issues.

Unless anyone wants to buy some barely used CTA's.