introduction to biking. bicycles : *renewable source of energy *clean (no fumes) *relatively...
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Introduction to Biking
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Bicycles:*Renewable source of energy
*Clean (no fumes)*Relatively inexpensive
*Easy to maintain*Lasting if maintained*Healthy (low impact, good cardiovascular)
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Types of Bikes:What kind of biking will you do?
Price is a good indicator
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BMX: Off Road and Tricks
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Road Bikes. Reduced Friction:
Narrow tires. lightweight . Speed
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Touring bike (Hybrid/Trekking): Long trips: Durable. Comfort.
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Mountain Bikes: Big tires. Better traction for off road.
Body position more upright. Comfort.
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Recumbent: Comfort: Easy on
body
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Aerodynamics: Reduce wind friction
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History of Bikes:
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Hobby Horse: 1816Better than a horse:
Don’t need to feed, not clean up!!!
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Velocipede: 1825Push pedals to turned shaft.
Hard work!!!
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Pedal Bike. 1835Pedal on front tire.
Better energy transfer
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Penny- Farthing: aka
Big WheelLarger tire for
more speed!!!
1872
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Safety bike: 1885 Chain Driven, pedals
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1896 Bike Craze: *Threatened economy. Only the rich could afford them.*Watch and jewellery business fell to almost zero.*Piano sales cut in half.*Theatre attendance dropped*Farmers and general public resented cyclists.*Restaurants refused to serve cyclists especially females in outlandish costumes.*Cyclists clubs organized for protection*Song “Daisy” was written*Wired spoke tires
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Bicycle Structure:
Bike frame:Diamond shape: Standard type of bike frame, very strong.Women’s frame: Dropped top tube, weaker frame. Good for dresses!!! Old School, but still in our society.
Know all parts of the bicycle!!
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PHYSICS OF BICYCLE:
* Sprocket combos for gear ratios:10, 15, 21, 24, 27 speeds (multiply # of front sprockets times
# of rear sprockets) Cogs also important!!
Need to shift gears often to maintain the proper cadence!!
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Wheels: Spokes: More spokes, greater strength. Most bikes have 36.
Tire width
Narrow – Faster, less friction, high pressure - BumpyWide - Better cushion, better traction, less punctures
Valves: Schrader - common / low air pressure
Presta – higher air pressure
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GENERAL SAFETY TIPS:
* Night riding - lights required. Reflectors recommended.* Always ride with traffic to reduce the relative speed differential * Don’t assume drivers will see you. * Use caution at intersections. Don’t assume right of way.* Cycle in a straight line, even while looking back.* Head radios are illegal
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WATCH FOR:*Cars doors opening in front of you.*People and animals darting in front of you.*“Sunday drivers”*Cars next to you that want to turn right*Storm sewer grates (tires could drop through)*Rail road tracks (if not perpendicular to road)Other things to look out for...
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• How Riding a Bike Reduces Global Warming
• Ride for Climate
• EU Research Findings
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*Most trips Americans make are short: 50% are less than 3 miles, 40% are less than 2 miles, and 28% are less than 1
mile. (US Department of Transportation, 2009)
*The average American household spends $7,179 per year on owning and driving their cars. (
Bureau of Transportation Statistics, 2010)
*On a round-trip commute of 10 miles, bicyclists save around $10 daily. (Commute Solutions, 2011)
*Traffic congestion wastes nearly 3.9 billion gallons of gas per year in the U.S. (Texas Transportation Institute, 2010)
*For every 1 mile pedaled rather than driven, nearly 1 pound of CO² (0.88 lbs) is saved. (
US Environmental Protection Agency, 2009)
Other Statistics
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Bicycling Equipment• Shoes: Stiff soles for power transfer. Some models actually attach into the pedals.
• Pedals: Clips and straps hold your foot on the pedal to allow 360 degrees of energy.
• Cycling Gloves: Padded palms to cushion hands help prevent wrist problems.
• Shorts: Padded shorts for comfort. Prevents PNN (Perineum Nerve Numbness).
• Shirts: Bright colored shirts for safety.
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Bicycle Racing• TOUR DE FRANCE: Super bowl of bike racing.
* Broken down into different stags.* Some steep mountain climbs can be gruelling. “Pyrenees”.*Average overall speed: 25.9 mph. 55+ down hill!!!!* Down hill descents can be fast and dangerous.* Some stage events are timed trials, short sprints.* Team work important. (Drafting) (Peloton )
Greg Lamond. Native Minnesotan three time winner. Gunshot
wound.
Lance Armstrong, (Texan), 2nd American ever to win the Tour de France. Seven time Winner (1999 – 2005), testicular cancer.
Yellow jersey is worn by overall leader
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Tour De France• TOUR DE FRANCE: Super bowl of bike racing.
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Techniques• Drafting: When one racer rides immediately
behind another to avoid blocking the wind with your body. It provides better aerodynamics and saves energy. Good for long distance rides.