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This graphic is not meant to be modern art. It's a bird's eye sketch of the relationship between the hips and pedals when the boom is in neutral vs angled left (red) and angled right (green). If you are ready for some seriously geeky analysis, keep reading below. I wanted to quantify the...

If you watch the video of Lance, you will see the path of the front tire is quite sinusoidal. I agree that it wouldn't seem to NEED to be so sinusoidal considering that theoretically the leaning could be accomplished while keeping the bike moving in a straight line. But in reality, every sprint...

Here's a tip for big descents. Shift into a big gear early on the descent. If you get to a speed where you no longer can or want to pedal, begin coasting. The next step is where beginners can get into trouble. Upon re-initiating pedaling, which you'll usually want to do near the bottom of the...

There has been MUCH written about the physics behind climbing on a Cruzbike vs. a fixed-boom recumbent vs. a standard DF bike. However, much of it is buried deep in long threads scattered over the blogiverse. Here is an accessible place where you can view a force vector diagram, or watch a...

My name is Jim, and I'm addicted to RAAM. The Race Across America started yesterday afternoon. This is a photo of Severin Zotter, currently crossing the desert about 20 miles ahead of his competition. Note the mask to keep the dust out of his lungs. Maria Parker, our son Will, and our daughter...

Thanks for the great pictures and write-up, Gary... also for the great crewing. I've been waiting for the official results to go online, but I still haven't found them. The numbers I list here are unofficial. I was very proud of the Cruzbike team. Ben and Larry are amazing. In their first year...

It's a very small change in the speed, but in a long race, it can add up. To use Calvin's Challenge 12-hour event as an example, cutting your Cd*A down by 0.01 would allow you to go approximately 3 miles further without any extra power output. credit to Chung's app here, for the above...

That's a good point. I noticed the same thing. It doesn't bother that much, but it would be better if the visor came down an inch further.

I've been meaning to do this for awhile. With Calvin's Challenge (a 12-hour race in Ohio) coming up in one week, I figured I better get around to it. I used R. Chung's method and his cool app as a poor man's wind tunnel. You need a power meter, a circular course where you don't have to touch...

Oh, that's an easy way to drop a photo into a post. Here's a picture of one of Tom Traylor's old racing bikes. I took some photos in his shed while visiting him a few years ago.

So we just got back from a weekend of serious climbing in the vicinity of Pickens, SC, where the US Postal Service Team used to practice. The X7 rear derailleur worked great. The only problem we encountered was on the first really big climb, it wouldn't stay in the 36t ring, but kept dropping...

Maria's V20 with a 12x36 cassette. Note the inline cable adjuster.

Spring is climbing season for our cycling friends here in North Carolina. We leave the eastern plains and head to the mountains on at least one long weekend every spring. With that in mind, I just installed a SRAM X7 type 2 rear deraileur with a wide-range cassette on Maria's V20. She just...