Urban Velo

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.

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  1. TerryMarch 4, 2012 at 7:50 am

    I don’t know about their cranks, but I have seen some of the Groovy Cycleworks bikes (they are only 30 miles from me), and the paint on those bikes is incredible.

  2. BenMarch 4, 2012 at 10:27 am


  3. twistMarch 4, 2012 at 11:56 am

    Not that unique though The Hive cranks(belonging to e13) feature this spindle design for while. Don’t really know ho came up with the idea first….

  4. GabeMarch 4, 2012 at 9:38 pm

    Seems that square taper also allows almost 100% contact. When are we going to stop trying to reinvent the mistakes that Shimano makes?

  5. ZacMarch 5, 2012 at 10:26 am

    Square taper cranks have 100% contact until they wear, which happens with every removal and re-torque. I will likely never put another square taper crank onto any of my bikes if I have a choice.

    Another advantage of this over a square taper (or spline) is manufacturing. It is pretty tough to machine a blind square into anything without using either an EDM or just casting the part to begin with. Easier manufacturing allows for less expensive custom cranks (even allowing groovy to offer custom lengths or different spider setups if he wants to).

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