Has anyone tried drilling and tapping a ½" left Mtn bike crank to
9/16" right-handed threads to make a right crank with no spider? I just twisted
my right crank, so I bought an SR crank set for $20,and now I’m going through
the pain of drilling out rivets and cutting off the spider legs to get rid of
all the stuff I don’t need. What a pain. Maybe drilling an tapping a left
would be the easier way to go.
I also wondered if heating up the cranks to about 200 degrees F before pounding
them on to the spindles (or freezing the unicycle and have the cranks at room
temp) would make the cranks last longer, since they would go on farther. Any
materials specialists out there? Is 200 degrees enough to alter the heat
treatment of the aluminum?
Chris Reeder
–Downhill is always better than uphill, except when you can’t stop.
Why not use cranks from a tandem bicycle set? The right crank on the captains
crankset has no spider. Order the right crank from captains crankset (the front
rider) and the left crank from the stokers crankset (the rear rider) and you
have a matching unicycle set. I used 170mm Sugino tandem cranks on my first muni
setup. As I recal it was about $40 (usd) for the pair.
Another route is to get the really cool Odyssey Euro cranks from http://www.unicyclesource.com The Odyssey cranks have a removable spider
and come in a variety of sizes perfect for muni. The Odyssey cranks are
also straight like unicycle cranks which means they don’t bend outward like
MTB cranks.
john_childs
>From: Chris & Jennifer Reeder <reed8990@uidaho.edu> Reply-To: Chris & Jennifer >Reeder <reed8990@uidaho.edu> To: “uni” <unicycling@winternet.com> Subject: >Right Cranks Date: Fri, 11 Feb 2000 17:13:50 GMT > >Has anyone tried drilling and tapping a ½" left Mtn bike crank to >9/16" right-handed threads to make a right crank with no spider? I just twisted > my right crank, so I bought an SR crank set for $20,and now I’m going through > the pain of drilling out rivets and cutting off the spider legs to get rid of > all the stuff I don’t need. What a pain. Maybe drilling an tapping a left > would be the easier way to go. > >I also wondered if heating up the cranks to about 200 degrees F before pounding >them on to the spindles (or freezing the unicycle and have the cranks at room >temp) would make the cranks last longer, since they would go on farther. Any >materials specialists out there? Is 200 degrees enough to alter the heat >treatment of the aluminum? > > > > >Chris Reeder > >-------------------------------------------------------------------- >–Downhill is always better than uphill, except when you can’t stop. > > >