Quote from TonyWard on Aug 7th, 2013, 6:23pm:You would probably be better off asking that question on BROL
You can find as much BS and disagreement on BROL as anywhere else. So much of the arguing there is done by engineering types who don't ride enough miles to really have a clue.
My own experience is that the high racer platform is the best combination of speed and comfort. Of course, YMMV. Mark L does pretty well on his Baron, and Paul gets around smartly on his Xstream, too. What kind of bike a rider likes best makes a big difference. But, if I had believed what I was reading on BROL at the time, I would have thought that a P-38 was faster than my Corsa. That was disproved, riding with Greg. He was faster than me on any other bike he rode, other than a V-Rex, but he was slower than me on his P-38. Any bike that puts you sitting very upright without a fairing will be slower than something more aerodynamic.
But you have to be fast enough to take advantage of the aerodynamics. Every year at HHH, I see riders on velomobiles and fully faired and socked bikes creeping along. If you average 11 mph on your bike, a very aerodynamic bike won't help much.
If you run small wheels, run wider tires. Small wheels with narrow tires don't handle rough roads well at all. And don't underestimate the comfort factor, especially on longer rides. It's a big player in my calling my Corsa the best combination of speed and comfort around. The big wheels do help, especially on rough roads. But, I've seen people saying that 700C wheels make a bike a lot faster (even Greg is guilty of that claim).
I call BS on that. My own experience is that once you get up to 559 (26"), the gains from bigger wheels are very small. When he rode RAAM solo, John Schlitter chose Corsas with 650C wheels. I'll put his ultra distance racing knowledge up against that of any recumbent rider. If you are a heavier rider like me (185 lbs) and you do end up on rough roads quite a bit, then a 700C bike is probably worth considering. But don't expect the 700C's to be a magic bullet.
There are those who think the LWB bikes are as good or better than high racers, but I don't share that view. The Xstream is probably the fastest of the non-faired LWB's, but if you recline the seat enough to be as aerodynamic as on a Corsa, the handling suffers. I can balance my Corsa perfectly at 3.5 mph on a steep climb. I couldn't do that with the seat really reclined on my Xstream.
I've liked my Xstream better since I put a more upright Sling Mesh seat and a fairing on it. But with most of my weight on the rear wheel, rough roads really jar me. I love that fairing in the winter, and the Xstream is a blast to ride, but I'll never use it for the long rides where I love the Corsa.
There are also people who prefer the low racer platform over everything else, but I never liked my view of the road well enough on something really low to want to do lots of miles on it.
The other thing that people argue about is what material a bike should be built from. Steel tends to make a bike heavy, but gives a great ride. Carbon fiber makes for a lighter, but very stiff, bike. Aluminum is a good compromise, but has a reputation of not lasting as long as steel. I now have well over 20,000 miles on my Corsa, so I'm saying a well built aluminum bike can last pretty well, and I'll likely be shopping for another aluminum bike when the Corsa frame finally does give it up. My thoughts are that for light weight riders, the light, stiff carbon fiber bikes may be best, but for those of us my size or bigger, the speed gain from a bike lighter than 24 lbs is virtually zero, and we're better off with either aluminum or steel.
So there are my thoughts. Take them for what they're worth, which may not be much, but still more than most of what you'll read on BROL.