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I replaced both front and rear tires at a cost of about $400.I assume you replaced both wheels for that $400, not just the tires.
Interesting that Bicycle routes can't exceed 200km on that site but auto routes can be thousands of miles. What is up with that?I don't know why the limitation. Maybe the Europeans (The site is by Michelin, a French company) never go more than 200km at one time on a bike.
I would be willing to pay a bit extra, and do with some negligible decrease in pedaling efficiency if it meant far fewer or no more broken spokes on the freewheel side. I am going to have to tie in to those web sites and do more reading on the subject, which I definitely will do.Do you have a problem with broken spokes or are just concerned about the possibility? Decades ago, in the days of plated or galvanized steel spokes, broken spokes were fairly common. Now with stainless steel spokes and a proper wheel build, broken spokes are very rare, even with 32 spoke wheels and fairly heavy riders.
There is much conventional "wisdom" and old wives' tales about the inefficiency of internal hub gears. The best science on the subject (the Kyle/Berto tests) actually found that the efficiency of derailleur and hub gears overlap in the same range (84~98%).The range of 84% to 98% is huge. It is not a trivial difference.
. One novelty someone is selling is a geared hub with an enclosed shaft drive so there's no chain at all. It would have an advantage if you ride in rain all the time, but the shaft with its bevel gears at each end wastes more than the chain too; so altogether you lose close to 10% of your power.Dynamic Bicycles (http://www.dynamicbicycles.com/) makes shaft drive bikes with 7 and 8-speed internally geared hubs. I got the chance to ride one a few months ago and the feeling of "drag" compared to a derailleur bike was very obvious. For low maintenance these are unequaled but the efficiency loss is dramatic.
I would advise against looking for your bike in any department store like Target, Wal Mart, or K Mart. While they have bikes with the same features as good touring bikes, they are less efficient machines.I would phrase this a lot more strongly. DO NOT, under any circumstances even consider buying ANY bike from K-Mart, Wal-Mart, Target, etc. They are a lot worse than just "less efficient".
I was drinking two to three gallons of liquids each day, maybe more, one summer while cycling the S-tier in the eastern regions, and hilly Texas farm roads. I must have lost quite a lot of calcium. I am not sure of any significant loss of bone density. I take supplements. The thing about calcium pills, they say, is that calcium from such sources may not be all that absorbable, ..........I definitely carry supplements with me on bicycling tours. My system may absorb only a percentage of the calcium in the tablet, but some is better than nothing at all.What greatly improves Calcium absorbtion from any source is Vitamin D and many, if not most of us, are deficient in it. We work indoors most of the time, and when we are outside we cover ourselves completely in high-SPF sunscreen. So, even being in sunlight doesn't develop the Vitamine D we need. A 2000 IU Vitamin D supliment taken daily is good insurance and really cheap if you buy house-brand or generics.