roca rule wrote:
if you read the velonews article you are going to find that they state that they have a 13mm stack height wich is on par with speedplays (i don't know if it takes the adapter as a default configuration).
That's indeed what it says, although Speedplay specifies a 11.5mm
stack height for their Zero pedals, which includes a 3-bolt adapter plate, but 8.5mm
directly bolted to the shoe sole. My setupis the latter.
THE LOWEST STACK HEIGHT: The Zero cleat positions your foot closer to the top of the spindle for improved power transfer.
11.5 mm stack height for 3-hole mounting
8.5 mm stack height for 4-hole mounting
Initially, I rode with adapter plates to dial in cleat position, but subsequently drilled my soles to ditch unnecessary stack height. I find over 4mm extra stack height is unacceptable, at whatever weight reduction, and I'm certain I'm not the only one who feels this way. In fact, I wish there were solid pedals with even less cleats to the pedal axis distance.
They seem to work acceptably. What is "DU"?
It's a type of dry-lube bushing with a teflon or PTFE-impregnated bronze coating on its sliding surface. They're quite durable and an industry standard for parts that need to move but don't necessarily require the smoothness of a bearing or need to operate within limited dimensional constraints.