Groovy Hot Rod Cranks at NAHBS
The Groovy Cycleworks Hot Rod cranks evolved from the original Grove Innovations mountain bike cranks. The spindle is unique in that it features a a tri-coidal polygon profile at the end. The shape allows for almost 100% contact without the use of splines.
Expect to pay about $400 for steel and more than $700 for titanium. Check out www.groovycycleworks.com.