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#42
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Noticeable difference on steep hill 20.3 vs 25.3 gear inches?
On 2017-05-27 09:20, wrote:
On Tuesday, May 23, 2017 at 2:32:37 PM UTC-5, Sir Ridesalot wrote: My friend has two bikes. One has a 30 teeth inner ring and the other has a 24 teeth inner ring. He's wondering if a 30 front and 32 rear cog would be that much harder to pedal up a steep hill than what a 24 front chainring and 32 rear cog would be. I thought it'd be noticeable but he's not sure because it's only 6teeth difference on the front. He's read somewhere that it takes a lot more teeth on the front to make a difference than it does on the rear. I take it your friend is not mathematically inclined. Math does not care if the tooth change is on the front or rear cogs. ... I think he meant you need to subtract a larger absolute number of teeth up front that you need to add in back for the same cadence increase. Which is correct unless you are already on a really small chain ring. ... It behaves the same. The chain has a different opinion about this :-) The reason a larger tooth change is needed on the front chainrings is because you are usually starting with much larger rings. A 42 or 39 ring on front. Compared to a 23 or 24 or 25 cog on back. To get the same percent difference, you have to change the 24 cog by 6 to get 25% and you have to change the 39 ring by 10 to get about 25%. 39x24 is a common gearing. Not enough for us older farts. -- Regards, Joerg http://www.analogconsultants.com/ |
#43
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Laundry: was: Noticeable difference on steep hill 20.3 vs 25.3 gear inches?
On Fri, 26 May 2017 14:51:15 -0700 (PDT), Doug Landau
wrote: JOY BEESON You got your ears on, Darlin'? If so could you please tell us how to get grease out of a white(-ish) cap with a cardboard insert in the bill? Thank You Saturday, 27 May 2017 Thanks to this thread, I remembered that I'd dropped my white linen do-rag into a bucket of water after this morning's ride, and it's spinning out in the washing machine now. Seems like overkill to run a full-size washing machine for something no bigger than a handkerchief -- I made one of DH's do-rags out of a bandana and had scraps left over -- but hand-cranked wringers (aka "mangles") are expensive, and we haven't got house room for one anyway. Machine finished spinning while I was writing, and the do-rag is now draped over a brake cable to dry. On to the topic: If there really is cardboard in the bill, the hat is disposable. I have seen ads for gadgets that hold a baseball cap's bill in shape while it dries -- some ads say that they are firm enough to run through a wash cycle -- but cardboard is never the same again after it gets wet. But if the bill is stiffened by Timtex or a sheet of plastic -- I've seen plastic needlework canvas recommended for this purpose -- all you need to worry about is breaking it or pressing a crease into it. I'd hesitate to put a stiff-billed cap through a wring cycle. Maybe I would if I had a no-computer machine that would allow me to arrange the cap flat against the wall before spinning, and wouldn't re-arrange things just to keep its CPU busy. My principle way to deal with stains is to saturate them with undiluted liquid detergent before washing, and try to give them a few minutes to soak before I start the machine. Usually no longer than it takes to sort the rest of the load and fill the washer, but I put them on the side where the water doesn't come in to give them an extra fifteen minutes. (My "smart" (alec) washing machine takes a ridiculous length of time to fill, because it has to run the water in cute patterns, a dribble of hot, a dribble of cold, a split second of full flow just to rub in that it could fill faster if it wanted to .. . .) A stubborn stain usually yields if I wet it, then rub it vigorously with a bar of real soap. On our trip from New York to Warsaw (in the eighties, if I recall correctly) I got a pleasant surprise: I washed my white socks in the hotel sink every night by rubbing the chain- grease stains with bar soap until they were hidden in suds, then sloshed them in the sink until I could see the stains again, repeat until the stains came out, wash the socks in the now-sudsy water, rinse a whole bunch of times because one can't wring by hand very thoroughly. Socks that had gotten dingy while being washed by machine after every ride got to looking really nice by the end of the trip. I once had a stain come out completely when I gave it a preliminary scrub with plain water and a vegetable brush. It was quite fresh, however; I'd noticed that I'd spilled tomato sauce on myself and rushed right to the sink. A soapy brush would be a very good way to clean a stiff-billed cap. An old stain on the edge of the bill: saturate it with liquid detergent, drop it into a bucket, wait at least ten minutes. The next time you notice the bucket, put in enough water to cover the cap and let it sit overnight or until washday. Wash as usual. If that doesn't work, repeat using real soap. -- Joy Beeson joy beeson at comcast dot net http://wlweather.net/PAGEJOY/ |
#44
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Laundry: was: Noticeable difference on steep hill 20.3 vs 25.3 gear inches?
Joy Beeson wrote:
:On Fri, 26 May 2017 14:51:15 -0700 (PDT), Doug Landau wrote: : JOY BEESON You got your ears on, Darlin'? : If so could you please tell us how to get grease : out of a white(-ish) cap with a cardboard insert : in the bill? Thank You :Saturday, 27 May 2017 :Thanks to this thread, I remembered that I'd dropped my white linen :do-rag into a bucket of water after this morning's ride, and it's :spinning out in the washing machine now. Seems like overkill to run a :full-size washing machine for something no bigger than a handkerchief :-- I made one of DH's do-rags out of a bandana and had scraps left ver -- but hand-cranked wringers (aka "mangles") are expensive, and :we haven't got house room for one anyway. :Machine finished spinning while I was writing, and the do-rag is now :draped over a brake cable to dry. :On to the topic: If there really is cardboard in the bill, the hat :is disposable. I have seen ads for gadgets that hold a baseball cap's :bill in shape while it dries -- some ads say that they are firm enough :to run through a wash cycle -- but cardboard is never the same again :after it gets wet. My mother had such a gadget in the early 80s, which she used to run caps through the dishwasher. -- sig 15 |
#45
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Laundry: was: Noticeable difference on steep hill 20.3 vs25.3 gear inches?
On Sat, 27 May 2017 23:35:30 -0300,
Joy Beeson wrote: On Fri, 26 May 2017 14:51:15 -0700 (PDT), Doug Landau wrote: JOY BEESON You got your ears on, Darlin'? If so could you please tell us how to get grease out of a white(-ish) cap with a cardboard insert in the bill? Thank You ...(My "smart" (alec) washing machine takes a ridiculous length of time to fill, because it has to run the water in cute patterns, a dribble of hot, a dribble of cold, a split second of full flow just to rub in that it could fill faster if it wanted to . . .) Love this nice personification, brought me a smile this holiday morning. Thank you. -- Ted Heise Bloomington, IN, USA |
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