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From: John B. <slocombjb@gmail.com>
Newsgroups: rec.bicycles.tech
Subject: Re: Urban cycling update
Date: Sun, 29 Sep 2024 08:52:06 +0700
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On Sat, 28 Sep 2024 15:53:30 -0500, AMuzi <am@yellowjersey.org> wrote:

>On 9/28/2024 2:52 PM, Shadow wrote:
>> On Sat, 28 Sep 2024 14:09:33 -0500, Mark J cleary
>> <mcleary08@comcast.net> wrote:
>> 
>>> On 9/28/2024 1:44 PM, AMuzi wrote:
>>>> On 9/28/2024 1:09 PM, Shadow wrote:
>>>>> On Sat, 28 Sep 2024 09:34:28 -0500, AMuzi <am@yellowjersey.org> wrote:
>>>>>
>>>>>> https://nypost.com/2024/09/27/lifestyle/nyc-bike-messengers-reveal-their-surprisingly-busiest-time-of-year/
>>>>>
>>>>>      All bikes shown have thick chains, ***no gears(maybe hub gears on
>>>>> one) and no apparent brakes. Hub brakes by back pedaling?
>>>>>
>>>>> <https://nypost.com/wp-content/uploads/sites/2/2024/09/victor-ramirez-credit-sammpicnyc-instagram-90397651.jpg>
>>>>>      []'s
>>>>
>>>> Right, primarily fixed gear.
>>>>
>>>
>>> I crazy dangerous job that I expect some people have no trouble taking.
>>> Not me that would be crazy. Also, having road a bike for most of my life
>>> and many miles I have never road a fixed great bike. Does this mean you
>>> are either pedaling for not? The hub must not be a freehub or cassette.
>>> In my world I have no idea how anyone could ride a bike like that, seems
>>> incredibly dangerous. Do they use cleats and what is basic speed your
>>> are going?
>> 
>> 	The way I see it, if the chain breaks you lose both the
>> ability to accelerate out of trouble (as with most bikes) but also the
>> ability to brake.
>> 	Imagine spinning those pedals down a steep slope then some
>> debris strikes your chain and "derails" it.
>> 	[]'s
>> 
>> 	*** by "no gears" I meant no gear changing. Obviously there
>> must be at least one gear.
>
>In practice fixed gear chain is not only wider and stronger 
>but since it only runs in one path (like a cam chain in an 
>engine) derailment is unheard of.
>
>That said, most urban fixed riders use a front brake, as do 
>I. The younger crowd will comment, "I can stop in three 
>meters!" which is fine until you have two meters between you 
>and the bus.

In Bangkok you aren't allowed to market a brake-less bicycle so any
"Fixi" you see in a shop will have a front brake installed.

And the only Fixi I ever saw on Bangkok roads ran into me while
stopping as he had no brakes at all :-)
-- 
Cheers,

John B.