Vienna Acoustics Mahler, carpet piercing cones?


I am the proud new owner of a pair of Mahlers, but what's with those tiny cones. Can anyone recommend after market cones that do a better job piercing the carpet?

Thanks
bokfudo
I use Polycrystal spikes on my speakers, that's what they came with. I've been very happy with every Polycrystal product that I have used.
Thanks to all, very usefull information, I'm off to do the research based on the recommendations.
Thanks
Bruno
Ended up with Speakerdude's recommendation and ordered spikes from member esoler, can't be happier.

Thanks