Users should know that Deda specs their bars and stems at 31.7mm , NOT 31.8mm - and the ZERO product is already at thinnest possible to reduce weight. So, what they did is actually beef up the clamp to prevent fracturing especially when used with 31.8mm bars (as is the most common available). As always - follow the mfg's specified torque and usage and you'll probably be fine. Bear in mind, METI also recalled about 10,000 mama-chari's because a handlebar steering tube snapped and the rider was injured. The cause? It was so rusted that the tube failed from fatigue and nothing more. Now if they'd only recall the thousands or so Taxis, then cyclists would be in a much safer position.
Recall procedure is pretty simple --
1) Return the endcap to the dealer you purchased from - or a dealer that sells DEDA. (Not the whole stem)
2) We (dealer side) collect them and send back to distributor (we use Kawashima or Takizawa, BTW)
3) Distributor sends us back a corresponding number of new endcaps.
4) There is some form to fill out to claim the recall.
Currently they seem to be out of stock - I'll check when they are back in stock again. And probably even talk to the Takizawa folks at Kusatsu directly - so I can bring this up.
This applies ONLY to the ZERO 100 series, by the way. NOT the Z-1 or other stems.
Owen, just to remind you, the one I gave you before to build a bike for a smaller rider was also Zero100.
If you're not comfortable to keep it in use, please claim for the recall and/or replace the stem.
Yep, remember it well and still owe you one for that! I will deal with that stem too, cheers.
Update; if you bought one of these stems from Wiggle, get in contact with firstname.lastname@example.org and they will help you send it back. Postage will be refunded. When they reply to you, you will get full instructions on how to get your money back / exchange it for something else, etc.