What are these bits on my new Vitus VEE-1?

[gmtfd]

Hi all

My new Vitus VEE-1 has some narrow bolts mounted horizontally in the dropouts, as if to stop the rear wheel from falling out. My previous single speed bike didn't have these and I can't see any purpose for them, since the axle bolts hold the wheel in perfectly well on their own. Can anyone tell me what they do?

Thanks a lot

Gareth

 

[byegad]

Keep the wheel square in the dropout. You'll use them to take up chain slack. After slackening the wheel bolts.

 

[smokeysmoo]

byegad beat me to it. Do they look something like this?

 

[biggs682]

otherwise known as chain tugs

 

[gmtfd]

Thanks for your help chaps, chain tugs is exactly what they are.