Does this exist?

[Radoslaw]

They are 26.0 indeed but cola can shim will do the trick.

 

[Radoslaw]

http://www.retrobike.co.uk/forum/viewtopic.php?t=148547

 

[FluffyChicken]

Syncros did a lot of variations!

They made negative rise Cattleprod and Cattleheads as well.

Were these not for a 26.0 road bar though? Although of course they could be made to fit a 25.4 mtb bar.

The road Altura ones where, identified by the single bolt at the front, the MTB twin bolts where also available