I got sick of wrestling my tires off the rims, and finally spent an hour or so knocking this thing up to help with the job. It's not graceful enough that I want to share plans with you, but the photo should be enough to get the idea.
It took about one and a half lengths of lumber (I had a 2x3 and a 2x4 handy), and I used 5/16 bolts, but anything roughly that size will work. Everything except the operating arm pivot and the pressing arm pivot is tightly bolted, as you'd expect.
The major change I need to make is to add doublers at the bottom of the vertical arm, which just slipped my mind, but it did successfully pop tires off rims this weekend, with the vertical arm just toenailed in. I'm also going to move the pressing arm's attachment point back towards the pivot, mostly to improve the pressing angle -- I ended up scooting the wheel back from the vertical member to get that angle right, and I might as well get the leverage improvement as well.
It took about one and a half lengths of lumber (I had a 2x3 and a 2x4 handy), and I used 5/16 bolts, but anything roughly that size will work. Everything except the operating arm pivot and the pressing arm pivot is tightly bolted, as you'd expect.
The major change I need to make is to add doublers at the bottom of the vertical arm, which just slipped my mind, but it did successfully pop tires off rims this weekend, with the vertical arm just toenailed in. I'm also going to move the pressing arm's attachment point back towards the pivot, mostly to improve the pressing angle -- I ended up scooting the wheel back from the vertical member to get that angle right, and I might as well get the leverage improvement as well.
