- TheThinkTank - lists.bikecollectives.org

Bicycle Physics Curriculum
by AndaLaLucha 16 Jan '08

16 Jan '08

Hello, Free Ride has this exciting partnership with City High School in Pittsburgh in which we teach bicycle repair in a "How Things Work" Physics class. We had some lessons with tire pneumatics and Boyle's law and also a gear ratio lesson. I was wondering if people had other science related curricula planned? If so can you e-mail me or put it on the wiki? Also, I don't know if people know already but the Youth Bicycled Education Network has some useful curricula posted-- http://www.yben.org/category/resource-guide/curricula-and-lesson-plans/ Thanks, Andalusia P.S. I'm not sure if people know what Ghost bikes are- but they are pretty powerful memorials for cyclists who have died. There was a memorial ride in NYC last week to honor the 23+ cyclists who died last year and I did a radio report about it and wrote an article for those interested Article: http://www.indypendent.org/2008/01/12/a-silent-roadside-reminder/ Shorter Radio: http://www.fsrn.org/content/new-york-city%2526%2523039%3Bs-ghost-bikes-hono… Longer Radio: https://wiki.indypgh.org/cgi-bin/twiki/viewfile/Radio/Shows/2008x01x14?rev=…

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Lights
by BovineOaks＠aol.com 16 Jan '08

16 Jan '08

I always behave like i'm invisible to cars no matter how much illumination I have. Brian UBP If I taped ten thousand lightning bugs to my body I still would not put out much light, Barely a dim glow if I was lucky. It is not the number of lights that make you seen or not seen it is the brightness of the lights that matters. If you put on Aircraft landing lights on the front of your bike and shot a beam a half mile down the road I am sure you could not say "I always behave like i'm invisible to cars no matter how much illumination I have." If you said "I have a bunch of low lumen flash lights on my bike and I can not be seen by cars that have lots of lumens coming out of their headlamps, then I would have to say DUH! Car drivers are looking for traffic to have high lumen lights out on the road, if you wish to be treated like traffic, act like traffic! What would you think if a car had two little battery powered flash lights or little bicycle blinkers where its head lamps were supposed to be? Would you see the car if other brightly lit cars were around it or would it be near invisible? Brian you should behave like you are invisible when you have low lumen lights on your bike, because you are. You can either whine about it or change your choice of lights. I am asking you to Think, We are the Bicycle education leaders of our communities. Christopher Wallace **************Start the year off right. Easy ways to stay in shape. http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489

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The Build-A-Bike Team Building Workshop
by Jonathan Morrison 16 Jan '08

16 Jan '08

www.build-a-bike.com You know we are doing good when the for-profit takes the idea mainstream. It looks like these folks have a registered trademark on the "Build-A-Bike" name. -- Sincerely, Jonathan Morrison Executive Director Salt Lake City Bicycle Collective 2312 S. West Temple Salt Lake City, UT 84115 w: 801-328-2453 c: 801-688-0183 f: 801-466-3856 www.slcbikecollective.org Get Addicted to Crank! http://www.slcbikecollective.org/crank/

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Re: [TheThinkTank] Lights
by BovineOaks＠aol.com 15 Jan '08

15 Jan '08

Brian I agree with you and never assuming you can be seen. I too have a 12 volt system and I ride I bike I know I can not be seen by cars coming on to the road way from a drive or an alleyway. I ride a low racing recumbent. I am below window level and I know that drivers can not see through sheet metal. I also know I can see their lights as they approach the roadway. I have found they can see my light also. I slow down and they stop when they see the pavement lit up by my lights. When a driver is Pavlovian trained to stop when they see the cross pavement lit by head lights. I have witnessed every driver stop, that I have approached from the side at night with my 12 volt system. In the world of dim low lumen bike lights, cars could not see you. Few people can afford 12 volt high lumen lights. Now there is a much more cost effective high lumen lamps out there. My 12 volt system cost $360 now led lights with similar Lumen output are $60 retail, $30 cost. My 12 volt system would last up to 3 hours on a huge battery, now led lights with similar Lumen output last 300 hours on 4 AA batteries. My points are simple: Great lights are affordable by the masses now. Point two: Most people do not know about the brighter lamps and choose lights that keep them invisible to traffic because of the lack of education from bike shops to their customers. I like that lights are so much less money for the amount of light they put out. I have a handle bar in the shop with 6 different lamps on it. I have a customer go to the far side of the room and I turn on each light and let them look at difference between older flash lights or blinking lights, and the new more powerful advanced LED lights. Sale made. NO BS, Compare/ contrast and sell. I also took photographs of all the lights aimed at a white wall 40 feet away. I printed the photos and use that as a sales tool also. This is what the light really looks like and how wide a beam it puts out at the brightness level compared to the other lights I sell. There will always be people that choose the $12 dollar lights, Given a choice people will choose the brighter lights also. **************Start the year off right. Easy ways to stay in shape. http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489

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spoke cards for categorizing
by Erik Stockmeier 15 Jan '08

15 Jan '08

Hi all- Erik D S from The Recyclery (Chicago/Evanston) here. We're working on making up some laminated spoke cards for our wheel room this winter... the idea being to have an easy, reusable (dry erase marker) id system for wheels that can tell any major features, defects, etc. so that people don't have to go traipsing back and forth to the wheel room to find something that both fits a fork AND spins. some ideas i've had are: diameter ideal tire width range (c/o chart by sheldon brown) hub/locknut-locknut width # of cogs (for rear wheels) other notes (things that need tightening, loosening, truing, rounding, overhauling, missing spokes, oddsized axles, rare alloys, whatever) have any other shops done this? if so, what information have you found relevant to put on the cards? i'd like to keep it simple enough to make a volunteer/work trade task without superfluous options of information--a nice volunteer/work trade task. Thats all! thanks, erik

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Lights and being broke
by BovineOaks＠aol.com 14 Jan '08

14 Jan '08

In a message dated 1/14/2008 9:52:45 P.M. Central Standard Time, BovineOaks(a)aol.com writes: In a message dated 1/14/2008 7:33:01 A.M. Central Standard Time, 1304bikes(a)gmail.com writes: I still feel that any light is better than no light. This is true any light is better than dressing in all black and riding at night. I do (easily) sell the lights for $60 to walk in customers and sell them for cost $30 students and volunteers. My customers are the same low income folks you sell to. I have sold great lights to inner city low income folks in St louis, Indianapolis, Champaign- Urbana, Chicago's south and west side. I sell education and give people a choice to make them safer at night time. Many people who own 15 dollar bikes and will balk at a $20 dollar repair have spent $60 on a lamp. If you teach safety, biology, act like traffic, you can sell good product to "newly educated" people. Broke ass folks like me still spend money wisely when we know the "WHY" a product is needed. I can not afford to drive a car around but I can afford a great light. I can not afford to spend time in a hospital because someone did not see me, but I can afford a great light. I can not afford a box to be buried in but I can afford a great light. If a homeless person wanted to work for a lamp, I would give him a job worth $30. If they do not want to work I do not have time for them. No one give me bikes for free, they make sure I am working to make the world a better place before they donate a bike to me. I work hard, and I believe you do too. I have a recumbent I built out of recycled materials for $20 and it has $50 bucks of rear and front lights. Being broke ass does not mean you can not spend money to make life better, beer, shoes, lights, and a news paper once in a while. If you know how to sell safety (helmets, act like traffic, reflectors, tires, brake pads,) you can also sell good lights. Safety is not just for rich folk, it is for all peoples of our world. if a person had no brake pads and rotted tires would you just say ride on the rims, go slower and use your foot for the brake? Or would you sell (talk and encourage them to buy) product for themselves because they need it to be safe on the road? Or are they too poor to be safe? **************Start the year off right. Easy ways to stay in shape. http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489

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Re: [TheThinkTank] Piles of freewheels?
by BovineOaks＠aol.com 14 Jan '08

14 Jan '08

In a message dated 1/14/2008 7:33:01 A.M. Central Standard Time, 1304bikes(a)gmail.com writes: I still feel that any light is better than no light. This is true any light is better than dressing in all black and riding at night. I do (easily) sell the lights for $60 to walk in customers and sell them for cost $30 students and volunteers. My customers are the same low income folks you sell to. I have sold great lights to inner city low income folks in St louis, Indianapolis, Champaign- Urbana, Chicago's south and west side. I sell education and give people a choice to make them safer at night time. Many people who own 15 dollar bikes and will balk at a $20 dollar repair have spent $60 on a lamp. If you teach safety, biology, act like traffic, you can sell good product to "newly educated" people. Broke ass folks like me still spend money wisely when we know the "WHY" a product is needed. I can not afford to drive a car around but I can afford a great light. I can not afford to spend time in a hospital because someone did not see me, but I can afford a great light. I can not afford a box to be buried in but I can afford a great light. If a homeless person wanted to work for a lamp, I would give him a job worth $30. If they do not want to work I do not have time for them. No one give me bikes for free, they make sure I am working to make the world a better place before they donate a bike to me. I work hard, and I believe you do too. I have a recumbent I built out of recycled materials for $20 and it has $50 bucks of rear and front lights. Being broke ass does not mean you can not spend money to make life better, beer, shoes, lights, and a news paper once in a while. If you know how to sell safety (helmets, act like traffic, reflectors, tires, brake pads,) you can also sell good lights. Safety is not just for rich folk, it is for all peoples of our world. if a person had no brake pads and rotted tires would you just say ride on the rims, go slower and use your foot for the brake? Or would you sell (talk and encourage them to buy) product for themselves because they need it to be safe on the road? Or are they too poor to be safe? **************Start the year off right. Easy ways to stay in shape. http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489

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Re: [TheThinkTank] Piles of freewheels?
by BovineOaks＠aol.com 14 Jan '08

14 Jan '08

-Effective (i.e., non-destructive) Cottered Crank removal (and re-usage) -ways to prevent cold weather pawl freeze up in cassette hubs -Cheap lights for bikes (I've heard tell of some creative holiday string-light setups) -ideas for rust proofing/rust prevention concerning steel frames, spokes, hub bodies, etc... the stuff that typically looks drippy and nasty. There is a physical problem with lights that are not powerful. As we humans get older our cornea become harder and do not open and close as quickly as in our youth. This leaves us blind to all but the brightest lights after we are hit in the face by car headlamps. I witnessed a cyclist disappear when he was backlit by car headlamps. He had a few $15 to $20 front flashers, a reflective vest, and reflective tape on the bike. Once he was back lit by a car all those inexpensive low wattage lamps were worthless to his safety If you do not invest in a bright light you will disappear when back lit and in other situations. The lesson I learned is simple if you are to be traffic at night time you need to act like traffic. If you can get the Cat Eye 520 at cost, it is about $30 and well worth it. 1200 candle power is close to the brightness of a car head lamp, 300 hour burn time with 4 AA batteries. When in traffic, act like traffic. If they are well lit, you should be equally lit to be seen. A flash light is not enough. I am not saying do not have fun with cheap lights too. I look like an alien space craft with all the cheap lights around my bike. I also have a serious head and tail light. I do make a spectacle of myself out on the road at night. Have fun and think about safety. Christopher Wallace **************Start the year off right. Easy ways to stay in shape. http://body.aol.com/fitness/winter-exercise?NCID=aolcmp00300000002489

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Piles of freewheels?
by plan_9＠riseup.net 13 Jan '08

13 Jan '08

Hey, I thought that having piles of old freewheels might be a problem common to bike collectives and wanted to see what folks did with them, or any other non-standard uses for bike parts. We have just "discovered" that you can pull apart a freewheel with two chain whips, one on the outer cog and the other on the third (the second is sometimes also threaded like the outermost) and apply opposite force. This usually involves two people lots of grunting and yelling, then the outer most ring will thread off (sometimes the second and third are also threaded) then the rest just slide off. The lowest three cogs are between 14-20 tooth which is perfect single speed range. So... we have built up a couple bikes using a single chainring in front and a 14t and a 18 or 20t threaded back onto the freewheel to make what I believe are called "dinglespeeds" which is basically a singlespeed setup with the option of loosening the rear axle, moving the chain over to the other cog and re-tensioning the chain in the dropouts (have to be horizontal). This allows us to build up really basic, low maintenance bikes that have both a "winter gear" and a "summer gear" (since we are in the brutal north) or I suppose if we actually had hills or trails, "on-road gear" and an "off-road gear". I know the concept of a dinglespeed has been kicked around a bit in the SS world, but usually it's done with respacing a cassette w/ two cogs, which are a rare commodity in our shop. Have other folks experimented with this setup? Good results? We have only built up a few, and thus far it has worked out pretty well on the bikes we are testing it on. Also, what kinds of other projects have folks done with either re purposing bike parts in a creative way or modifying them to breath new life into shop excess? Thanks, Andrew FM Community Bicycle Workshop

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Bike Computer Geeks of the World Unite!
by Edward France 10 Jan '08

10 Jan '08

Bike Rockstars, Following up on discussion from BikeBike 07, our shop would love to share bike collective open source-ish software for tracking volunteer and user hours (Nathan from Austin Yellow Bike), tracking inventory and interfacing with website (Rich from Boulder), and bad-ass register check-out software (joshua from LA). Our Bici Centro shop is potentially moving into a new (and bigger!) space and is ready to set up books and go paperless for tracking stuff. Who knew but we also happen to have some genius computer software peeps working in the crew and they have interest to spend time synthesizing most applicable elements of these different programs and putting that program back out to the group again. My question is, where did we end off on this discussion? Is there an ongoing small group discussion that we could join in on? Since I've lost individual emails, could Rich, Nathan, and Josua possibly try to get back to me? Many thanks folks for the amazing work you all do, and that us santa barbarians do our best to emulate. -Ed France BiciCentro.org

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