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#1
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Average speed on really old road bike vs. new
If a rider averages 20 mph for 10 miles on a 1989 Schwinn World Sport
without aero bars or toe clips, about what average speed could he expect if he was to ride a 2003 Cervelo P3 (or some other top-of-line bike) with aero bars and toe clips? Thanks for any guesses. |
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#2
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Average speed on really old road bike vs. new
Tue, 19 Aug 2003 03:53:03 GMT,
t, "TPL" wrote: If a rider averages 20 mph for 10 miles on a 1989 Schwinn World Sport without aero bars or toe clips, about what average speed could he expect if he was to ride a 2003 Cervelo P3 (or some other top-of-line bike) with aero bars and toe clips? Thanks for any guesses. There's probably lots of things you could do that would improve your aerodynamic efficiency more than having a special TT bike. http://www.damonrinard.com/aero/aerodynamics.htm The P3 doesn't make sense unless you're riding time trials or triathlons at pro-levels and seeking every last advantage. They look cool but I wouldn't want one as a replacement for an '89 Schwinn. Guesses to three decimal places. http://www.analyticcycling.com/ -- zk |
#3
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Average speed on really old road bike vs. new
Tue, 19 Aug 2003 21:59:36 GMT,
, "TPL" wrote: Guesses to three decimal places. http://www.analyticcycling.com/ Thanks for the comments and links. I'm not looking to buy a new bike. A friend has a 2003 Cervelo P3 and I was just wondering how much difference there would be riding his bike versus my old bike. I would guess with toe clips, aero bars, and the superior quality of the bike it would result in over 5 mph higher average speed? Sound reasonable? Sounds like a lot. From the site above, if I'm reading it right, you might gain 100 seconds on a 10K TT at 20mph by using narrow aero bars in a low position instead of just riding on the drops. You can gain more by zipping up your jersey. Toe clips won't benefit your aerodynamic efficiency but they may increase your pedalling efficiency. No doubt about it, his bike will _feel_ faster but that's more to do with geometry and tires. -- zk |
#4
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Average speed on really old road bike vs. new
"TPL" wrote in message
k.net... If a rider averages 20 mph for 10 miles on a 1989 Schwinn World Sport without aero bars or toe clips, about what average speed could he expect if he was to ride a 2003 Cervelo P3 (or some other top-of-line bike) with aero bars and toe clips? Thanks for any guesses. The bike isn't going to make much difference. There is a few pounds difference in weight (which is essentially negligible), but the only real differences will be the clips and straps (more efficient) and the aerobars (more aerodynamic when being used). Both of the last two can be added to your World Sport, the former much more cheaply than the latter, and the differences between the two bikes will be even smaller. How much? For the same rider, probably not more than 1 or 2 mph without the additions. Even less with the additions. -Buck |
#5
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Average speed on really old road bike vs. new
If you can ride your frilend bike, try it. My guess is that you might gain one
to one and one half miles an hour. Let us know what happens. Ernie TPL wrote: "Zoot Katz" wrote in message ... Tue, 19 Aug 2003 03:53:03 GMT, t, "TPL" wrote: If a rider averages 20 mph for 10 miles on a 1989 Schwinn World Sport without aero bars or toe clips, about what average speed could he expect if he was to ride a 2003 Cervelo P3 (or some other top-of-line bike) with aero bars and toe clips? Thanks for any guesses. There's probably lots of things you could do that would improve your aerodynamic efficiency more than having a special TT bike. http://www.damonrinard.com/aero/aerodynamics.htm The P3 doesn't make sense unless you're riding time trials or triathlons at pro-levels and seeking every last advantage. They look cool but I wouldn't want one as a replacement for an '89 Schwinn. Guesses to three decimal places. http://www.analyticcycling.com/ -- zk Thanks for the comments and links. I'm not looking to buy a new bike. A friend has a 2003 Cervelo P3 and I was just wondering how much difference there would be riding his bike versus my old bike. I would guess with toe clips, aero bars, and the superior quality of the bike it would result in over 5 mph higher average speed? Sound reasonable? |
#6
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Average speed on really old road bike vs. new
For what it's worth, I have an older road bike (1980's Nishiki) and a newer
Gary Fisher hybrid. On the same course (a mix of flats and hills), the difference in average speed for me is about 10%-15%. I average 17-19 on the hybrid and 20-22 on the road bike. Based on that, I suspect an improvement as large as 5 mph in switching to a more modern road bike is pretty unlikely. Mark "TPL" wrote in message k.net... If a rider averages 20 mph for 10 miles on a 1989 Schwinn World Sport without aero bars or toe clips, about what average speed could he expect if he was to ride a 2003 Cervelo P3 (or some other top-of-line bike) with aero bars and toe clips? Thanks for any guesses. |
#7
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Average speed on really old road bike vs. new
TPL wrote:
I'm not looking to buy a new bike. A friend has a 2003 Cervelo P3 and I was just wondering how much difference there would be riding his bike versus my old bike. I would guess with toe clips, aero bars, and the superior quality of the bike it would result in over 5 mph higher average speed? Sound reasonable? Toe clips might make a tiny difference, but it probably depends a lot on your pedaling style. Aerobars would make a significant difference, if we're talking about the bars that place the rider's arms in front of the torso, but that alone is more like 2 mph. Other than that, tyres could make a _small_ difference, but you can always put similar high-performance tyres on your old bike. 5 mph sounds way too much in any case. Such differences generally require drastic changes in the rider's aerodynamics, so it would be only possible if the Cervélo had a _much_ more aerodynamic riding position, and that is only useful is the rider can actually adapt to it. The fact that the Cervélo is of "superior" quality doesn't necessarily make it much faster. For what it's worth, I changed from a suspensionless mountain bike to a modern road bike a year ago. The MTB had slick tyres and the handle bar a few inches below the seat, so it was a fairly fast setup for road riding. The difference in average speed was more like 1 mph. In general, there's a lot of truth to the cliché that "it's not about the bike". -as |
#8
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Average speed on really old road bike vs. new
"TPL" wrote:
If a rider averages 20 mph for 10 miles on a 1989 Schwinn World Sport without aero bars or toe clips, about what average speed could he expect if he was to ride a 2003 Cervelo P3 (or some other top-of-line bike) with aero bars and toe clips? Thanks for any guesses. Zoot Kats replied: There's probably lots of things you could do that would improve your aerodynamic efficiency more than having a special TT bike.... Toe clips would definitely help and if you don't have them, drop bars (means new brakes, new shifters, alas), also help a lot. You may try to lower the bars to increase performance, but there are limits, especially for an older folk. Aerobars will help, especially with a front wind, but again, you need flexibility. Tires are a great help. Back in 1980, "high pressure" meant 50-60 psi, whereas it now means 100 psi. If you still have the original tires and if they are relatively low pressure, it might pay to replace tires. Likewise, narrower tires increase the speed, but at the expense of comfort. Another point: make sure you use slick (aka smooth) tires, not ones with significant tread, knobs and the like. These are good in mud or snow, but they rob you of speed. Finally, make sure that your bike is well tuned. Freshly greased wheels roll much better than wheels that still run on 1989 grease... Besides, if your grease is that old, the bearings are dry and will wear off faster... Regards, Michel |
#9
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Average speed on really old road bike vs. new
If a rider averages 20 mph for 10 miles on a 1989 Schwinn World Sport
without aero bars or toe clips, about what average speed could he expect if he was to ride a 2003 Cervelo P3 (or some other top-of-line bike) with aero bars and toe clips? Thanks for any guesses. I have been riding the same course on both my "top of the line" Mongoose XR150 weighing in at about 45 pounds with everything including a kitchen sink mounted on it and my 21 lb Trek 2300 (actually riding the course lot MORE on the Trek...go figure.) In any case, I average 5 mph more on the Trek. I usually run about the same average heart rate on either bike. Of course, the 2300 doesn't handle as well on the trails ;-) -- Tom S |
#10
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Average speed on really old road bike vs. new
I found an unused Schwinn World Sport for $15. at a garage sale. The tires, with Schwinn brand markings, still had the little rubber nubbins from the molding process, sticking out from the treads. It rode very nicely, but I spent $115. for new alloy hubs and rims, spokes and better tires, and discarded the stock steel rolling gear. This made it faster and I don't think I'd get more than a tiny amount of extra speed from an expensive new bike that had wheels comparable to what I installed on this one. I liked the feel and fit of this bike and it hauled my large size for years without trouble. Steve McDonald |
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