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Jan
30
comment Riding into a headwind faster than my top speed - how is it possible?
@JamesRyan - You are exerting force on the pedals. (Riding a 40mph conveyor belt is easy, since you only have to deal with rolling friction.)
Jan
30
comment Riding into a headwind faster than my top speed - how is it possible?
The power a cyclist produces is the torque on the crank times the cadence. I don't know about you, but when I'm riding into a headwind I gear down, so that a turn of the crank is not getting me nearly as far as in still air.
Jan
29
comment Riding into a headwind faster than my top speed - how is it possible?
You are wrong with regard to a basic detail. The energy expended in this case is power multiplied by time, not force multiplied by distance. The amount of power required to barely move forward in a 30 mph wind is only slightly less than the power required to go 30 mph in still air.
Jan
29
comment Where to get replacement bolt for rod brakes
That basic style of bolt is a more-or-less (mostly less) "standard" hardware item. Similar bolts are used, eg, to fasten fender stays. And, worst case, one could get a standard bolt and drill a hole in it.
Jan
29
comment Riding into a headwind faster than my top speed - how is it possible?
In general, above about 10mph your rolling resistance is negligible compared to air resistance, so if you can't do 30mph on the flat in still air you will have difficulty moving at all in a 30mph headwind, if it's really head-on. And sometimes a crosswind is even worse. The main reason you can even stay upright in such a wind is that you're willing to exert yourself that hard, whereas you're not when it comes to doing 30mph, at least not for long.
Jan
29
comment Are all vintage bikes difficult to work on?
Every bike (that survives at all) becomes "vintage" after a period of time, And the bike manufacturers have conspired to increase the rate of "vintagification" over the years, such that a bike can effectively enter that category in ten years or less if you are unlucky in your choice of componentry.
Jan
29
comment What is a good gents' hat to wear while cycling in formalwear?
Whatever you feel is appropriate for your funeral.
Jan
28
comment How do I wrap a road bike handlebar?
Use hockey tape. Standard bar tape works so poorly I've never figured out why anyone uses it.
Jan
28
answered front wheel takes more impact than rear?
Jan
28
comment Why is a steady cadence so important? Or is it?
(That said, a 6.5 mile ride is not any sort of "challenge" to anyone who's in halfway decent shape. You're welcome to ride that distance using any style that suits you.)
Jan
28
comment Why is a steady cadence so important? Or is it?
Certainly every rider (moreso as you get older) needs occasional "breaks", but these should involve getting off the bike, walking around a bit, having something to drink and maybe eat, and taking a pee. Simply coasting for the 30 seconds you might get away with it on flat ground with no tailwind is not a "break".
Jan
28
comment front wheel takes more impact than rear?
That's known as a "snake bite", often the result of running tire pressure too low. But definitely the front wheel takes more abuse than the rear.
Jan
28
comment Why is a steady cadence so important? Or is it?
Human muscle efficiency is less if you pedal intermittently vs pedaling continuously at a reasonably constant pace. And, given that wind resistance is proportional to the square of relative velocity, riding fast then slow is less efficient in that regard as well.
Jan
27
comment Why don't we see this special progressive 3x5 gear setup being offered?
It is relatively easy for a professional biker to get any (physically possible) gear arrangement that he wants. If they aren't being made, they aren't useful. In fact, you could likely make your proposed setup yourself, aside from the problem of finding derailers capable of handling the ranges. It's easy enough to remove cogs from the rear and replace them with spacers. And a guy with an NC machine could craft your front sprockets, if you can't find them on the market. Have at it!!
Jan
26
comment Gear cables replacement - inline barrel adjusters
I prefer to have them near the top of the down tube, if geometries permit. But many modern bikes have "haywire" cable patterns and they have to go where they fit.
Jan
26
comment how to increace the friction between tyre and road
You have made the question even more nonsensical. Tire traction (within normal bounds) has virtually nothing to do with bike efficiency & necessary power.
Jan
26
comment Good cycling goals?
@OraNob - Or simply enjoying the time you spend on your bike.
Jan
25
comment Worries about a gear ratio of 1:1?
There is a slight theoretical issue, in terms of the repeated stress on the same point of the wheel. (Would also be present, to a degree, for 2:1, 3:2, etc ratios.) A bike that is designed to take mountain riding, however, should have wheels built to a level that it would not be a big concern, especially if only used intermittently.
Jan
25
answered how to increace the friction between tyre and road
Jan
25
revised Sensible shifting on a triple chainring?
Spell "allude" correctly