Got any snowy commute derailleur &/or bike rinsing advice?
Regarding BB noises: often simply lubing the threads of the shell takes away the creaks, particularly if you have a standard, sealed model.
It might not be your BB either. Bikes (and just about anything else mechanical) are pretty good as making things sound like they’re coming from one place when they are actually quite far away.
You can see if it’s your bb bearings by putting the bike in a stand, dropping the chain off of the front rings, placing your ear on the nose of the saddle and spinning the cranks. A good bb sounds all whooshy-whooshy, a bad one sounds crunchy.
Creaks when you pedal can be hard to diagnose, and can be coming from your bars, crank/bb interface, pedals, rear hub, derailleur hanger, saddle etc… It can also be the sign of a crack that is rubbing against itself, but I’d doubt that the case.
All washer fluid has chemicals in it, except maybe an empty bottle of washer fluid in outer space. When I find food labels that say the food contains no chemicals, I write to the company. I am that geeky (or anal?).
40% alcohol (it should specify which alcohol in your MSDS) is likely enough to craze some hard plastics and dry out/crack some rubber and other rubber-like synthetics with repeated use. It will also dissolve a good variety of adhesives, if you got anything (stickers?) stuck on your bike, and I’m sure could mess up a homemade paint job. I agree that it will not do much to your powder coated frame or drive train, or the outside of a car.
More to the point, it will do a lousy job of dissolving road salt on your bike. NaCl is only sparingly soluble in alcohols. NaCl is extremely soluble in water, and even more so in warm water. If anyone wants a really cool chemistry demo, I’d be happy to set one up.
You are definitely a geek.
I can say that with all of my experience in cars and graphics, I have never seen washer fluid damage rubber, plastic, or stickers.
Washer fluid has run through rubber, vinyl, and other rubber like synthetics for decades without problem (hoses, o-rings, pumps, nozzles). I ran washer fluid through a pump made for water for years without issue (it was a rearward facing tailgater spray).
I’m sticking with–I wouldn’t wash my bike with it, but it won’t hurt anything.
(We are going to settle this tonight with an ice skating race.)
You can ice skate, I’ll be washing the stickers off your bike with a bottle of isopropanol.
@dwillen If anyone wants a really cool chemistry demo, I’d be happy to set one up.
If you do one, I am SO there!
Geeks R Us
will this chem demo involved throwing a large chunk of sodium or lithium off one of the bridges? cuz if so, i’d like to watch.
I don’t think we can get away with such shenanigans after 2001, and while that would be super awesome, it wouldn’t really illustrate my point–chemistry-wise.
I had a chem prof for a typically little attended chem lab “lecture” hour sophmore year. First class (attendance at ~20%), he showed a hilarious safety movie that showed things blowing up. Then he blew something up. He then promised to blow something up at the beginning of every class using a different chemical reaction. Spent the rest of the class going over the lab materials as expected.
The second class, and every class thereafter was standing room only (always same format – blow something up, then cover lab materials). He got great reviews. Don’t remember his name, but he was very cool.
Chemistry is awesome.
Back when I was a freshman undergrad engineering major I had a chem lab with a TA that spoke no English whatsoever. It was a fairly useless endeavor for either side to even attempt to understand one another — he gave up, the class gave up.
On the first day of class he showed us where the emergency chem showers were, and then showed us what happened when you pulled the cord. You flood the entire floor. Nice work Kai.
About the only thing he understood from us was the names of chemicals, so in my younger, stupider days we just convinced him to give us whatever chemicals he would so we could mix them together under the fume hood and see what happened. Never got any explosions really, but made a bunch of messes. We regularly, just about every class, implored him that we needed more dry ice, like buckets full of it, which all we did was put in the sink with lots of hot water to fog up the lab. Every day. I still laugh thinking about it.
I can’t believe we all graduated.
Sometime in the middle of my first semester of chemistry ever, the prof managed to burn a hole through his instructor-edition textbook, start the carpet on fire, and evacuate the entire science building by accidently shooting out a flaming gummy bear from a test tube.
It was around Halloween and he said “I usually use a piece of candy corn for this demo, but I left it at home today. I found this gummy bear on the floor and decided this would work well enough!”
Gummy bear had waaaaaay more fuel than a piece of candy corn, apparently. It went something like this (but with much, much more flaming bear bits flying out): http://www.youtube.com/watch?v=CJ-pSfXcXtw
never mind the useful bits, that was totally worth rereading just for the flaming bear bits at the end.
Anonymous 09/24/2012 at 5:46am #
for cheap lube – 5-30, 10-40 (automobile engine oil).
Except in extreme temps it will not freeze. You can get if for free – look in any gas station trash can.
For freezing cables – find a place that sells snowmobiles, buy those cables. They are coated, the housing has as a liner designed to reduce freezing, and the housing has ‘extra’ room inside so that cables are harder to freeze.
Anonymous 09/24/2012 at 1:32pm #
@BTDT ” the housing has ‘extra’ room inside so that cables are harder to freeze”
That could be a problem for index shifting since extra room means extra “play”. And you can buy coated cables at bike store too. A little more expensive but last longer.
It’s been on a Saturday in the past. Did something change?
stef told me it was sunday. maybe shes wrong. also, wrong thread?
Gore stopped making cables. Stock up now. They are quite nice. But just because you don’t have to replace the cables as regularly doesn’t mean you should let them go that long. The tight bend necessitated by modern brifters means the cable will eventually break and will do so in the shifter which may kill the shifter.
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