Gear Table
Bike stores used to give away gear tables as promotional or advertising material, it seems I hardly ever see them anymore. If I talk to a newbie bike rider about gears in inches they have no idea what I am talking about.
So in writing this I am not sure if I am dealing with a subject that most of my readership will already be aware of, or do those who don’t know even care? I’ll assume you do care and there may be some little snippet of information you will find interesting or useful.
Why do we talk of gears in “Inches?” For that you have to go all the way back to the Penny Farthing, or High Wheeler.
It was the diameter of the big wheel. A 60 inch or in other words 5 feet diameter wheel was a 60 inch gear.
This only became widely used when the chain driven bicycle came on the scene.
It became necessary to advertise these as having a similar 60 inch gearing, or higher or lower. A new buyer could compare that with what he was already used to.
The formula for calculating any gear is simple. Divide the diameter of the rear wheel by number of teeth on the rear sprocket.
Then multiply this by the number of teeth on your chainwheel. Assume the rear wheel is 27 inch for a road bike, this is not a precise measurement, but rather a comparison.
For example if you are using 50 chainring, with 18 tooth sprocket, you are in a 75.0 inch gear. (27 divide by 18, times 50 equals 75.) If you drop down to your 36 ring using a 13 tooth sprocket you are in a 74.8 inch gear. Close enough to be the same gear.
Back in the day we used to train on gears in the 60s or 70s, and race on gears in the 80s and 90s. Today on level terrain I ride around 69 or 70 inch. It allows me to pedal at around 72 to 75 rpm.
We used to spend hours studying gear tables, trying to find the ideal gear range. Possibly today’s bikes with 10, 11, and now even 12 sprockets on the rear hub, you are pretty much covered in any situation. Whereas, we only had 5 or 6 cogs on a freewheel, and it was necessary to choose each sprocket carefully depending on the terrain you planned to ride.
For a leisure rider today he has the luxury of more gears than he needs at the top or bottom of the range, and a rev counter to tell his cadence, so it really doesn’t matter what gear he is using. I think I have just answered my own question as to why the gear table is obsolete.
Hope you enjoyed the history aspect. May I take this opportunity to wish you all a Happy New Year? Be safe and stay healthy. A special thanks to my regular readers who have sent donations. These have helped tremendously to offset the cost of maintaining this blog and my Registry. Your kind help is much appreciated.
Dying for Freedom
We are told that Freedom is not Free, that people die in order that we have freedom. When a soldier goes to war he volunteers and he accepts that he could possibly die, after all a war consists of people on both sides trying to kill each other.
When a person climbs into their car to go shopping, or on a business trip, or another gets on their bicycle, they do not accept that they could possibly die. They are not volunteering to sacrifice their life in the cause of freedom.
Back in 2011 the National Transportation Safety Board (NTSB) recommended that all electronic devices be banned from use while driving. One would think he NTSB has some clout, this is the organization that looks into airplane and train crashes.
Read any article reporting the NTSB’s recommendation and look at the comments that follow. People are talking about “Big Brother Government,” etc. etc. There followed a huge outcry against a cell phone ban while driving. People were concerned that a freedom was being taken away from them.
People are in denial, they think they can dial, talk, and even text safely while driving. The NTSB’s recommendation came about because a report showed that 3,092 people died the previous year because of distracted driving.
Compare the 3,092 who died in one year because of distracted driving, with the 4500 who died in nine years fighting a war in Iraq. You could say the 3,092 also gave their lives for freedom. The freedom to use a cell phone while driving, but ask the family members of those who died if their loved ones are viewed as heroes, Many of those who died were the ones using the cell phone.
My main concern is the number of young people in their teens and early twenties texting and driving. These are the ones with the least amount of driving skills, engaging in the most dangerous form of cell phone use.
The annoying part I find is that most calls and text messages sent and received are not essential. These are not important business calls that drive commerce, these are idle, stupid chit-chat between friends and family. I saw one TV clip where a 19 year old boy stated, “I sent an insignificant text, ‘LOL’ and I killed a man.”
So how did the NYB getting involved play out? Were there any widespread new laws be passed, and are the police enforcing them? Do the courts hold people accountable for their actions, and hand down the appropriate penalties?
When a local cyclist was run down from behind and killed by a distracted driver, the driver paid a $113 ticket. The same week a friend of mine got a $1,000 ticket for playing loud music in his apartment. The law is totally cockeyed.
There used to be another freedom that was never really legal but was tolerated for many years. The freedom to get totally shit faced and then get behind the wheel of a car. Although some people still drink and drive it is no longer socially accepted.
Had the driver who hit this cyclist been drunk he would have almost certainly gone to prison, but the outcome makes little difference to this unfortunate bike rider. Either way, he is still dead, and the only freedom he died for was the one to ride his bike on the road.
However, he did not voluntarily give his life in the cause of freedom, and will not necessarily be viewed as a hero. Society does not grant that luxury to his friends and family, but society wants, and even expects the freedom to continue using cell phones while driving,
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