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Touchy front brakes
Some people are crashing bikeshare e-bikes because the front brakes are
too touchy. https://www.autoblog.com/2019/04/15/...recall-brakes/ Some discussions on the topic claim the brakes in question are probably Shimano Rollerbrakes; that is, drum brakes filled with lots of grease. https://www.sheldonbrown.com/rollerbrakes.html One person theorized that the grease is washing out while the bikes are parked outside, turning them into "binary" units - on or off. But I don't know if that's been proven yet. If any front brake is to be capable of stopping a bike in the shortest feasible distance, it's capable of dumping a novice who doesn't know to brace oneself against the handlebars. (Jobst claimed most "over the bar" crashes were really caused by insufficient bracing; that the cyclist inadvertently knocked the handlebars sideways as he slid forward on the bike.) So, given that bike share bikes will be used by lots of novices, should they purposely be given weak front brakes? I've long thought that it's a bad idea to have bike brakes with large mechanical advantage - IOW, that can be locked up with very little finger pressure. I've seen a novice go OTB the first time she tried to stop quickly using Shimano Dual Pivot calipers, vs. single pivot caliper brakes. I suspect OTB happens a lot more these days. -- - Frank Krygowski |
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#2
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Touchy front brakes
On Wednesday, April 17, 2019 at 9:34:19 AM UTC-5, Frank Krygowski wrote:
So, given that bike share bikes will be used by lots of novices, should they purposely be given weak front brakes? -- - Frank Krygowski I'll argue about this assumption since I have nothing else to do. Do people who do not ride bikes ever, rent these communal bikes and ride them? I find that hard to believe. I can believe that young, fit, athletic people who work out, jog, but don't ride much, do rent these bikes. But I would still suspect they are familiar with bicycling and have ridden some. Bicycling, even these rental bikes, require effort and muscle and strength and sweat. Something a person who does not bicycle already, will NOT do. |
#3
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Touchy front brakes
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#4
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Touchy front brakes
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#5
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Touchy front brakes
A few years ago I commuted by electric bicycle to work. One time I was riding home and at the first stop the slightest touch of the brakes it locked up and I went over and scraped both palms, beyond other injuries. Tried it afterward and it was ok and never had the problem again. So squeeze the brakes before starting out to hopefully avoid this problem.
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#7
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Touchy front brakes
On 17/04/2019 4:37 p.m., David Scheidt wrote:
AMuzi wrote: :On 4/17/2019 1:50 PM, wrote: : On Wednesday, April 17, 2019 at 9:34:19 AM UTC-5, Frank Krygowski wrote: : So, given that bike share bikes will be used by lots of novices, : should they purposely be given weak front brakes? : -- : - Frank Krygowski : : I'll argue about this assumption since I have nothing else to do. Do people who do not ride bikes ever, rent these communal bikes and ride them? I find that hard to believe. I can believe that young, fit, athletic people who work out, jog, but don't ride much, do rent these bikes. But I would still suspect they are familiar with bicycling and have ridden some. Bicycling, even these rental bikes, require effort and muscle and strength and sweat. Something a person who does not bicycle already, will NOT do. : :The Citi are motorized, with an electric motor & battery. :For regular rental bikes you'd have a stronger argument but :I don't know, haven't seen any local/tourist rental numbers. Judging by what I see in Chicago, most people riding a Divvy bike are not regular bike riders. Lots of tourists, particularly along the lake. There is a base of users that use them for the first and last miles of commutes. I don't know the actual numbers, though. I have friends that live in downtown Montreal that use the Bixies. Mostly they don't have safe places to secure their road bikes so they opt for the bike share option. But there are also a lot of tourists, students and local residents that just use them. Anyone using one more than a block or so would likely figure out the brakes though. Especially around the Plateau or Mont Royal with the hills and traffic. I have not heard of anyone going OTB on a Bixie. I don't think I'm seeing the issue here. |
#8
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Touchy front brakes
On 4/18/2019 12:01 AM, wrote:
On Wednesday, April 17, 2019 at 2:33:39 PM UTC-5, AMuzi wrote: On 4/17/2019 1:50 PM, wrote: On Wednesday, April 17, 2019 at 9:34:19 AM UTC-5, Frank Krygowski wrote: So, given that bike share bikes will be used by lots of novices, should they purposely be given weak front brakes? -- - Frank Krygowski I'll argue about this assumption since I have nothing else to do. Do people who do not ride bikes ever, rent these communal bikes and ride them? I find that hard to believe. I can believe that young, fit, athletic people who work out, jog, but don't ride much, do rent these bikes. But I would still suspect they are familiar with bicycling and have ridden some. Bicycling, even these rental bikes, require effort and muscle and strength and sweat. Something a person who does not bicycle already, will NOT do. The Citi are motorized, with an electric motor & battery. For regular rental bikes you'd have a stronger argument but I don't know, haven't seen any local/tourist rental numbers. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Pretty positive the rental bikes in downtown Des Moines are regular pedal powered bikes. Not electric. I have not observed who rides them. We used the bike share in Paris a few years ago, in the pre-electric days. On one hand, I can confirm that the French people using the bikes seemed to be much fitter looking than the average American. But then, almost all the French people were much fitter looking than the average American. -- - Frank Krygowski |
#9
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Touchy front brakes
On Thursday, April 18, 2019 at 9:41:51 AM UTC-7, Frank Krygowski wrote:
On 4/18/2019 12:01 AM, wrote: On Wednesday, April 17, 2019 at 2:33:39 PM UTC-5, AMuzi wrote: On 4/17/2019 1:50 PM, wrote: On Wednesday, April 17, 2019 at 9:34:19 AM UTC-5, Frank Krygowski wrote: So, given that bike share bikes will be used by lots of novices, should they purposely be given weak front brakes? -- - Frank Krygowski I'll argue about this assumption since I have nothing else to do. Do people who do not ride bikes ever, rent these communal bikes and ride them? I find that hard to believe. I can believe that young, fit, athletic people who work out, jog, but don't ride much, do rent these bikes. But I would still suspect they are familiar with bicycling and have ridden some. Bicycling, even these rental bikes, require effort and muscle and strength and sweat. Something a person who does not bicycle already, will NOT do. The Citi are motorized, with an electric motor & battery. For regular rental bikes you'd have a stronger argument but I don't know, haven't seen any local/tourist rental numbers. -- Andrew Muzi www.yellowjersey.org/ Open every day since 1 April, 1971 Pretty positive the rental bikes in downtown Des Moines are regular pedal powered bikes. Not electric. I have not observed who rides them. We used the bike share in Paris a few years ago, in the pre-electric days. On one hand, I can confirm that the French people using the bikes seemed to be much fitter looking than the average American. But then, almost all the French people were much fitter looking than the average American. -- - Frank Krygowski I did a 51 mile ride with over a thousand feet of climbing yesterday. I felt fine when I got home and it was take out the garbage night so I mowed the lawns and pulled a lot of weeds though you couldn't tell anything has changed. That REALLY broke the camel's spine though and I am still exhausted today. |
#10
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Touchy front brakes
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