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comment Wheel building - ever encountered nipples that are screwdriver-only?
There are some aero rims that are deep enough so that spoke nipples aren't accessible.
comment Why can't I drive my city type (folding) bike uphill?
Just as any FYI, for most cyclists "really steep" is around a 10% grade (about 6 degrees), and "super steep" is 20% (about 11.5 degrees).
comment Crank threads stripped - both pedals fell off
What Daniel said. They definitely mixed up the pedals and then forced them on, ruining the threads.
comment Bike computer wheel size setup
One of the pro tips for this is to use toothpaste. Put a line across the pavement, ride over it, and then measure between the first line and where the tire touches down again.
comment Is it realistic to fuel a long ride with NO sugar?
@keymaster - I base my guess on a couple of thoughts. First, when the duration of a ride gets up to 6 hours, most cyclists will not be riding that hard because they cannot maintain a high energy output for that long. If you aren't riding that hard, you are likely in the meat of your aerobic zone, and 75/25 is a reasonable guess there. If you can talk comfortably during most of your ride, this is probably accurate. If, on the other hand, you spend a lot of time on hard rides and are riding really hard for the whole time, you will burn more carbs than I estimate.
comment Is it realistic to fuel a long ride with NO sugar?
@Keymaster - most of the charts for calories burnt/hour are overly optimistic. In the ride I listed in my last comment, I averaged 17.3 mph, which the charts suggests is over 900 cal/hour, but my actual burn was only 2/3 of that.
comment Is it realistic to fuel a long ride with NO sugar?
@Stephen - I ride with a powertap, so I have an accurate measure of the amount of energy I put out (actually, it's probably 3-5% low). My last ride I put out 1093 kJ in 1:40, which puts me at about 650 kJ/hour. Because of a coincidence of conversion factors and human efficiency, that's roughly equal to the number of calories burned.
comment Are there any scientific studies proving the benefits of clipless pedal systems?
There are a number of pro teams out there who are looking for every little bit of power for their cyclists. They all use clipless systems. That's some pretty good evidence in my book
comment Suggestions for winter cycling glasses?
+1 on safety glasses. I ordered a few pairs from an online safety glass store; they are a lot cheaper than clear glasses in the cycling store.
comment What are the 'easiest' ways to determine functional threshold power?
They did change from 2x3 miles to 2x9 minutes. Carmichael talks about in the time crunched cyclist
comment Can too many electolyte supplements be dangerous?
If you are working hard, it is hot, and you are a salty sweater, you can lose a gram/liter of sweat. Do that for 5 hours, and you have lost 5 grams. If you eat lots of processed food, you might be able to make that up, but if you eat better than that (ie mostly fresh food without a lot of salt), you can easily become hyponatremic. Dealing with hyponatremia through salt supplements is pretty common approach if you read the information on sites like ultracycling.