Ski Bike

Step 7 Attach axle clamp block

Now you've got to attach the top block that will clamp the axle in place. This design is a little bit strange, but I decided to go with it because it allows fore/aft adjustment of the ski after you've cut and drilled and screwed everything, but mainly, it allows easily adjustable resistance to pivoting, which is great if you ever plan to depart from the ground on this thing.

You'll need one additional 2x4 block and four 5/16 x 3 lag bolts and washers per axle.

You know the drill..... Clamp the blocks in place and drill appropriately sized holes for the lag bolts. I laid out the holes to be 1" in from the cut edge and 3/4" in from the outer edge of the wood. Unclamp the blocks and re-drill the top block to a size that will allow the lag bolts to be slid easily through the hole.

If required, use a knife to carve out recesses to make room for the inner axle bolts, like I did for my front axle (shown in the pictures).

Install and tighten all of the lag bots, being careful to tighten evenly so that you don't crack the wood. Tighten one by one until the ski pivots with an acceptable level of resistance. If you like, you can over-tighten initially so that the axle gets seated nicely in the wood, and then loosen to taste.

Repeat for the rear axle!