I built this kayak hauler for a friend.

I spent a good bit of time thinking about the hitch.  My favorite part is using a short piece of automotive heater hose to wrap around the bike seat post.  It flexes a little, absorbs small shocks, and attaches and removes quickly with no tools.  I like it.

The trailer has a wooden frame with low-speed low-pressure wheels, slightly smaller than wheelbarrow wheels.  They roll nicely and absorb minor shocks.

It's all connected by a long piece of black iron pipe, bent to the contours of the rear bike wheel and the bow of the kayak.  And the pipe swivels in the frame so everything moves.

Main components:
- Non-swivel pneumatic casters, 10 inch diameter wheels:  http://www.harborfreight.com/10-inch-pneumatic-rigid-caster-38943.html
- Black iron gas pipe, 10 ft length, 3/4 inch diameter:  http://www.lowes.com/pd_313570-185-314+34X120_0__?Ntt=313570&UserSearch=313570&productId=3538958&rpp=32
- Automotive heater hose
- Misc timbers, metal, nuts, bolts, nails, fittings, etc.

- A hydraulic pipe bender was helpful:  http://www.harborfreight.com/12-ton-hydraulic-pipe-bender-32888.html
- Generic handyman tools:  Drills, saws, wrenches, files, etc.

Step 1: Seat Post Hitch

I designed this hitch to fit around the bike seat post.

- Yaw:  The rubber hose allows the hitch to swivel about the seat post as the bike turns left and right.
- Roll:  The big bolt and nylock nut allows the hitch to swivel as the bike leans side to side.
- Pitch:  The rubber hose and rubber bumper allows a little movement as the bike and trailer move up and down.

Installation and removal:
- Two metal pins hold the rubber hose to the hitch.
- To remove the hitch from the bike, simply remove one pin from the hose, then slide the hose off.
- To install the hitch, slide the hose over hitch, then install pin.

Details in the photos.
<p>I got my own design in the works right now. Thanks for the link on where to buy some wheels.</p>
<p>Cool! good for you.</p>
<p>Looks awesome, simple but effective! </p><p>Only thing on my mind before I try this, didn't you rip trough the hose? I mean, all of the force of pulling the kayaks is going to the hose and is distributed to the two nails that keep the hose piece in place. OK it is easy and cheap enough to replace, but it looks not so durable to me...<br></p>
Ok like the idea. Now your next challenge..... Is... Wait for it.... <br> <br>A kayak rack for your bike! Now that would be something.. <br> <br>Really I do like your little trailer.... Bill
<p>or......... a bike rack for your kayak :-)</p>
Well said, and an amphibious bike &amp; kayak rack

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