Raising a Concept 2 Model B ergometer
I made a set of platform legs for it that raised it
13" off the ground, because getting down and back up from it so low to
the ground was unhappy-making. Initially I made this:
But I hadn't allowed for the surge of my inertial momentum...this lashup
parallelogrammed. I had to do this and then that to keep it square
as weaknesses of what I'd done surfaced.
I ended up with this ridiculous kludge upon kludge:
If I was to do it all over again, it would be
- Go to the lumber yard, have them cut a piece of 3/4" thick AC
plywood into two pieces, 68" by 24" (if you don't have a model B
adjust the dimensions for the foot print of your ergo....note
that it will need to be slightly bigger than that as will become
clear). Also get two 12" concrete blocks (they are 12x16x8
inches), a caulking gun tube of construction adhesive like
PL9000 and a caulking gun if you don't already have one.
- Test the layout: Place one sheet of plywood on the floor, put
the concrete blocks on it, and the second piece of plywood on
top of that. Put your erg on top and make sure everything is
placed well, with the blocks under the the erg's feet. and those
feet overhanging the block so a bolt can go through the feet and
the plywood. I've circled the bolt in red above
- Mark where everything goes on the plywood and remove the erg.
Separate all the pieces
- Liberally apply the construction adhesive to the bottom
plywood where the blocks will sit, put the blocks there, apply
adhesive to the blocks' tops and put the top plywood in place.
Push down and wiggle the top plywood to squish the adhesive.
Check the alignment of everything.
- Wait a few days so it sets hard
- Drill and bolt the ergometer to the plywood. Note that the
plywood and cement block placement needs to allow for the block
NOT to be under the feet of the erg...you need to put a bolt
through the plywood and you can't do that if the block is
underneath the erg's feet. You might use T-nuts, AKA Tinnerman
nuts, for this. You have to bolt the ergo to the plywood...it
will slide around otherwise.
I also got (see picture above right)
- a 1/2" floor flange
- a length of1/2" black iron pipe
- a PVC tee, glue socket run and 1/2" female pipe thread on the
I hold onto the tee when getting on and off the erg.