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#22
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On Mon, 25 Oct 2004 14:58:34 +0000, neil0502 wrote:
IIRC, the man in question has already snapped a couple of pairs of cranks. How is that possible? Wouldn't LA -- or any other top TdF rider put dramatically more force on the cranks than this gentleman likely could? Why would you believe that? This guy, just standing on one pedal, is putting a full 500lbs of force on that one crank arm. No one exerts that much force from a 165lb body riding a bike. Is it safe to assume that--if this /is/ true--that we must be talking about some really poor, totally low-end cranks?? IOW: how much force can your average Ultegra/105/DA crankset take before it gives. I was assuming it was about 10x anything I'd ever give..... I would imagine any road crank would snap right off if this guy tried at all to make that happen. -- David L. Johnson __o | Enron's slogan: Respect, Communication, Integrity, and _`\(,_ | Excellence. (_)/ (_) | |
#23
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"neil0502" wrote:
IIRC, the man in question has already snapped a couple of pairs of cranks. How is that possible? Wouldn't LA -- or any other top TdF rider put dramatically more force on the cranks than this gentleman likely could? Not even close. How much pedal force you can generate is limited to your entire weight, plus some amount added by pulling on the handlebars. At 375 lbs, I can put close to twice as much force on a pedal than Lance Armstrong can, and a 500-pound person could push much harder. Remember, he is as strong as you would be if you wore 300+ lbs of weights strapped onto your body at all times. Is it safe to assume that--if this /is/ true--that we must be talking about some really poor, totally low-end cranks?? IOW: how much force can your average Ultegra/105/DA crankset take before it gives. I was assuming it was about 10x anything I'd ever give..... You assume wrong. Those cranks are cheese. Even kid-sized riders who jump their BMX bikes require something much stronger. Chalo Colina |
#24
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Dave Stallard wrote:
I'd recommend a stationary bike in a gym. At 500 lbs, riding a regular bike is not safe for him or for others sharing the road with him. Don't be a prick. He's far less of a hazard to other road users than anyone in a car. Bikes can be made to serve people of different sizes, fortunately. Be thankful that this is an electronic forum; any 500-pound person who is strong enough to pretzel his cranks could also wrench your puny limbs until you squealed like a little piggy. Chalo Colina |
#25
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David L. Johnson Wrote: On Mon, 25 Oct 2004 14:58:34 +0000, neil0502 wrote: IIRC, the man in question has already snapped a couple of pairs of cranks. How is that possible? Wouldn't LA -- or any other top TdF rider put dramatically more force on the cranks than this gentleman likely could? Why would you believe that? This guy, just standing on one pedal, is putting a full 500lbs of force on that one crank arm. No one exerts that much force from a 165lb body riding a bike. Is it safe to assume that--if this /is/ true--that we must be talking about some really poor, totally low-end cranks?? IOW: how much force can your average Ultegra/105/DA crankset take before it gives. I was assuming it was about 10x anything I'd ever give..... I would imagine any road crank would snap right off if this guy tried at all to make that happen. -- David L. Johnson __o | Enron's slogan: Respect, Communication, Integrity, and _`\(,_ | Excellence. (_)/ (_) | 1st of all, why are some of you using lance armstrong as an example of a strong rider? He is an ENDURANCE cyclist. His body strength is close to nothing compared to this 500 lb man. When you weigh that much, you are automatically really really strong, because you have to carry all that weight around. If you are going talk about strong cyclists, at least use a track sprinter in your statement. Lance does not have superior strength. Exceptional endurance and fitness is NOT strength. Why do so many people not see the difference? -- velomanct |
#26
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On Tue, 26 Oct 2004 12:59:38 +1000, velomanct
wrote: David L. Johnson Wrote: On Mon, 25 Oct 2004 14:58:34 +0000, neil0502 wrote: IIRC, the man in question has already snapped a couple of pairs of cranks. Does this really ring true? I do a cowboy mount on my Trek7500FX, and that means 225-230lbs, with a bounce...this is highly -not- recommended (lol) in some cycling uh, 'bibles'. If I put down a bathroom scale and cowboy mounted it... Anyway, though we know higher end cranks are lighter, hollow, carbon components, titanium, what have you - I'm not up on crank lore, but I'd say more likely to break? Anyone who sold this gentleman a bike with cranks that were not 'sturdy' - shouldn't he get free replacement? Would bike shop sell him the same cranks - (thus the couple "Pairs", seems odd sounding). -B I've never performed a lewd act with a bathroom scale! Except, this one time in Peoria, ... [Now, I'm not doubting the OP. ('Stories' can get confused over telling and retelling...) There are 6'10 250lb guys here. Anyone ever snap any cranks? My feel for the recounting is that the cranks snapped when? While riding and pushing up a hill? Well we've heard what happens to a person who snapped a crank that way last spring. Major ouchie, major hospital bills... Maybe one would just stand on it to start pedalling and push and --snap-- the crank disintegrates like the Incredible Hulk just stomped it....or, maybe when cowboy mounting? How, then do you break 'pairs' of cranks...] Badger in 'CSI' mode. ;- |
#27
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On Sun, 24 Oct 2004 17:48:58 -0700, xmp333 wrote:
Hi, What bike(s) would you recommend for a 500lb rider, who's about 6'2 in height? He's been able to ride the Electra Rally Sport, although he bent a crank on it, and he broke a crank 3 times and warped a wheel on the Electra Townie. He was considering an adult trike, but he'd prefer the better speed a two wheeled bike would offer. Any recommendations would be greatly appreciated. Thanks! Perhaps recycle the Electra frame if it seems sturdy enough and add some mucho strong wheels. I'd have some custom 40 spoke wheels built with a Sturmey- Archer rear hub with the internal 3 speed transmission. Using internal gearing allows you to use a very strong single speed chain and the mightiest bmx/single speed crankset you can find. You'll have to find such a hub on ebay or the like, here's one example: http://cgi.ebay.com/ws/eBayISAPI.dll...9015 573&rd=1 and building the wheel around it would cost probably an extra 100 dollars in parts and labour. That should be a step on your way to a bomb proof ride. Best bet is to find a really cool local bike shop and give them the challenge of assembling the beast for your buddy--a shop that's worth its salt would be thrilled to do something different like this, I know I would. I sincerely hope to see both of you out there on the road! Bestest of wishes and don't give up!! Two words from me to your buddy: RIGHT ON!!! |
#28
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How about exploring http://www.waltscycle.com/trikes.htm for something
he likes? One item listed is the Sun EZ-3, I weigh 270 lbs and ride an EZ-1. Since March I have ridden 1800 miles on it, I hit a pothole and bent the front rim slightly, after 1400 miles the rear rim split and I had to get a new rim (have seen this defect on a bike friday with a 170 lbs rider with 7000 miles). One item i the industrial trike, he might consider that. At least the prices are reasonable. wrote: snip 500 pounds is certainly a large individual. I'm giving the benefit of the doubt that the OP was genuine and serious. I am genuine and serious. This person is a very good friend of mine, and he loves cycling. He used to ride an Electra Rally Sport. Apart from a bent crank (yes, the cranks again), it held up well -- it even survived a nasty crash -- but it's a single speed and the rear brake has almost 0 stopping power. Despite his weight, he can ride for long periods, and he was riding almost every day. I've been on ~20 mile rides with him. Since riding, he lost 10 - 12 lbs and he's trying to adopt a healthier lifestyle. But cycling is still his love, so naturally it's his choice of exercise. snip |
#29
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How about a Harley Davidson softail?
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#30
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Badger_South wrote:
On 25 Oct 2004 12:07:05 -0700, wrote: Just curious. I was thinking about this OP as I was pedaling along on a night ride last night. 500 pounds is certainly a large individual. I'm giving the benefit of the doubt that the OP was genuine and serious. I am genuine and serious. This person is a very good friend of mine, and he loves cycling. He used to ride an Electra Rally Sport. Apart from a bent crank (yes, the cranks again), it held up well -- it even survived a nasty crash -- but it's a single speed and the rear brake has almost 0 stopping power. Despite his weight, he can ride for long periods, and he was riding almost every day. I've been on ~20 mile rides with him. Since riding, he lost 10 - 12 lbs and he's trying to adopt a healthier lifestyle. But cycling is still his love, so naturally it's his choice of exercise. I sorry about any caualness in your reception on this. This is a very supportive group. Some times there's a lot of wise-cracking and banter. Lot of clydesdales riding here. Ahem. Badger, Since the above--despite lack of attribution--is quoting me, I wanted to be clear: I was not trying to be insulting in any way, shape, or form. My comments were sincere. I just know how often trolls lurk and wasn't interested in participating in sadistic dialogue at the expense of any sort of person. If your apology was made on my behalf, then I failed to make myself clear and offer an apology to xmp333. I applaud the efforts of any person engaged in healthy activities, especially when the potential benefits are as profound as they could be in the case of the OP's friend. Neil |
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