|Weight weanie question.||paulw|
Oct 20, 2001 7:40 PM
|I know it really doesn't matter that much but I'm curious.
My bike is the following: Seven Alaris (~60cm) with a Reynolds Ouzo Pro fork, Ultegra groupo, Open Pro/Ultegra wheelset, Speedplay X/2 pedals and other stuff. I weighed the thing the other day and it came out to 19.5lbs.
It's a great bike. I love riding it and have zero complaints. However, based on what I've read here I'm surprised it's not lighter. What would be the best weight reduction path if I were so inclined?
|Cut back your calories by 300 a day.||cory|
Oct 20, 2001 7:52 PM
|Seriously--what matters is the weight of the bike/rider package. Your bike is already within a pound or two of pretty darn light. You'll notice more improvement (and save money) by cutting out a bagel and coffee a day than by pruning the last few grams from the bike.|
|I figured someone would say that.||paulw|
Oct 21, 2001 6:24 AM
|It's a valid point. I'm 6'1" and weight 175lbs. So, I'm not overweight but dropping 5 lbs probably wouldn't be a bad thing. Ironically, a heavier bike is probably better for that purpose.
Mostly I was curious.
|re: Weight weanie question.||CrazyMan|
Oct 20, 2001 10:33 PM
|It is actually quite light for the size, so not to worry.
To lose weight, though...
saddle, seatpost stem and bar...can probably save you a pound, depending on what you've got. (flite tt, use post, magnesium stem)
wheelset...those ultegra hubs are heavy...going to an amclassic wheelset (around $400) or other lightweight set will probably save at least 1/2 pound.
It does cost money, though.
Oh, and going for lighter chain (sram), shifters and rear derailler (record) would also save weight.
|Start with lighter wheels and you may stop right there||jacques|
Oct 21, 2001 1:52 AM
|Reducing wheel weight will do the most good in terms of acceleration and climbing ease. Plus, the first time you'll put lighter wheels on your Seven and then pick it up off the ground, you'll be amazed at the difference. Chances are you'll stop worrying about weight from then on.|
Oct 21, 2001 4:44 AM
|2 lbs would save you ~8 seconds off 3mi 6% climb get a grip|
|If you can save him two pounds have at it||matt|
Oct 21, 2001 5:22 PM
|Maybe he should leave his water bottles off while he is at it...not! Outside of lighter wheels and lighter tires he will get into big bucks to shed the extra weight and not feel it like he would in rotating weight. That is where the golden cookie is. The less rotating weight the faster the acceleration. He will probably lose the rest in sweat by the time he gets to the top of the 3 mile climb.|
|hogwash, I agree. And funny.||jacques|
Oct 22, 2001 5:02 AM
|LOL, that old 8-second saw used to be passed from cheap cycling book to cheap cycling book in the 70's. Now it's passed around on internet bike forums. Pretty funny for bad math to live so long :-)|
|re: in the 70s||cyclopathic|
Oct 22, 2001 5:32 AM
|actually I've used www.analyticcycling.com
6% grade, 4800m, 200lbs rider/bike/gear 300wt output.
350w output it's 6.75s
400w output 5.72s
450w output 4.93s
to match 2lbs diff rider needs to increase his power output by 1%, 3-4.5watt. Aero wheels helmet or faster tires would have much more impact.
I agree any math is bad for weight weenie why? because he knows he is faster he needs no stinking math
|re: in the 70s||jacques|
Oct 22, 2001 6:21 AM
The math is bad not because of the arithmetic, but because it bypasses the real world. In a 3-mile climb, a rider slightly, but constantly accelerates and decelerates. There's more of this if the rider punches a large gear, less of it if the rider turns smooth circles. Add to that some weaving, speed changes induced by the behavior of other riders and a final attack just before the summit and the math just turns to numbers without meaning.
Believe me, light wheels are wonderful to go uphill on. And as to those 8 seconds: I'd absolutely love to be 8 full seconds ahead of everyone else on my next hill climb! That's a huge amount of time to take out of anybody over only 3 miles.
|I never disagreed||cyclopathic|
Oct 22, 2001 6:59 AM
|for someone 8sec would mean being dropped off peloton.
yes taking rotational weigh has double effect on acceleration so taking 1/2lbs off tires/rims would be like taking 1lb off bike. Great for crits no doubt. For climbing? nah
Look the impact of extra weight being vastly over estimated. there're other things of equal or higher impotence. Aerodynamics, tires, hub adjustment etc.
the most importang part the engine. You get much better return if you put $1500 in good training
|Problem with analyticcyciling.com||Stew|
Oct 22, 2001 12:39 PM
|My problem with analyticcyciling.com is that all their data is based on "lab" experiments. Nothing is conducted or validated in the real world. Experimentation is great, but a lot of their findings don't seem to be directly projectable to the real world.
Example, I went from a 35 pound hybrid to a 22 pound road bike. I'm going faster now, but not to the degree that you would expect based on information from analyticycling.com. So I don't look at that site anymore.
Oct 22, 2001 6:11 AM
|Now that the season is over I'm going to work on losing 10 lbs this winter. I'm 5'11" and 165 lbs. Why lose the weight?
When I'm climbing with good, local climbers that 8 seconds is about the difference between when they crest a hill and when I crest it.
I want to be the first one up next spring. Help me! I'm obsessive!
Oct 22, 2001 7:08 AM
|loosing 10lbs while maintaining strength would save you ~32 seconds off 6%/3mi climb but can you maintain 155lbs?
I'd bet lifting weights and running could be as beneficial good luck
|Yes, I can||McAndrus|
Oct 22, 2001 12:58 PM
|Actually 155 is my fighting weight. Every couple of years it gets over 165, then I diet it back down. To borrow from VeloNews, I belong to the Old Men Who Get Fat in Winter cycling club.
I usually do lift weights in winter but I've also found that I can't really lose weight in the summer because of cycling. It seems odd, I know.
I did a four-day four-centuries ride in September. Before the ride I was 165 and after the ride I was 169 but my pants were loose. Dang those thigh muscles build up fast ;-)
As to running, I subscribe to Sean Connery's philosophy expressed in The Untouchables after he'd just chased down a bad guy, "That's enough of that running s--t!"
|re: Old Men Who Get Fat in Winter||cyclopathic|
Oct 22, 2001 3:25 PM
|welcome to the club! I crashed on Labor day was off bike for 4 weeks and gained 8lbs (and I was only 137!) I guess I am due for 5-6 centuries, I should take a week off ;)
long multi-day events play strange tricks on you sometimes
I had similar experience rode 740mi over 4 days and by the end I was 143lbs (starting weight was 139) then over week it dropped down to 135. I've heard similar things happened to RAAM racers /my guess sodium misbalance or kidney overload, anyone?/
Had "enough of that running s--t"? I hear you. If man was meant to run he wouldn't get bicycle
|re: Weight weanie question.||Turtleherder|
Oct 22, 2001 1:01 PM
|To get back to your original question as to what would get the bike lighter I have to ask, what seat post do you have? Do you have the ultegra seat post? If so get a new one, the Ultegra weighs 300 grams. You could save a 1/3 of a pound with a run of the mill american classic post which weighs around 200 grams.|| |