nice shop bike

nice shop bike
Boulder Bicycle Lugged

Thursday, October 15, 2009

Decaleur for Ahead Style Stem

For awhile, we've been wanting some solution for a decaleur to use with ahead style stems. This is especially important for us since our Boulder Bicycles are usually supplied with ahead style stems.

There are ahead style decaleurs out there, and while they seem to be generally satisfactory, there are reports of occasional failures. Plus, those that attach with "a big washer" around the steerer can move if the decaleur is not sandwiched tightly. And finally, most of the decaleurs out there, even the highly regarded Alex Singer and our own Rene herse decaleurs still depend on an interference fit and you always wonder when going over speed bumps.

Well with the modified Berthoud decaleur shown above, we think most of the issues are dealt with. It takes some work, and probably not everyone can do this at home (most houses don't have a milling machine on hand, although we bet some do!), but we will probably wait for some feedback on the above example we just sent out the door, and then supply them on our Boulder bicycles. We might even offer a kit with hardware that you can by with a Berthoud decaleur if you want to do it at home.

Boulder CO


  1. Nice, but looks like it might interfere with closing the main flap all the way. Maybe more pics would help?

  2. I'm not really sure why people worry about the bag popping off. I just buckle the rear strap of the Berthoud around the rear stop on the rack.