Yes... 5 pounds is 5 lbs..It does not matter to roll them behind or to push them in the front.. Correct?.

so tru.

cardo for at least 40min before your first meal of the day will kick start your metobolism for the rest of the day.
do this for a month and you will drop pounds.

if you're already skinny, EAT SOMETHING

I agree.

Pounds is pounds...whether they are on your bike, on your back, on your body, or in your body. You still gotta push all of those pounds up the hill.

Er, this itself is a troll post, yes?

School reform is a must.

Not sure where this conversation is going or has gone, but I will attempt to explain a few things. First, the reason I wanted to start with some small items to lighten my bike is that I have a one man business that is seasonal. This is not my good season, so I can only afford small stuff at this time. Wheels are expensive and must wait for better cash flow. I did not dismiss anyone about the importance of wheels, I simply must wait for better times.

Not sure where the stuff about the rider's weight became the subject or why. If you want to discuss your weight I am sure there is a post for that somewhere. I do not mind discussing weight, but the bike was the subject. Also, I do believe 5 pounds off the bike is more important for performance than 5 pounds off the rider. Thirty pounds off the rider might be a different situation, but not the subject here.

A relevant questions concerns rotating weight, the wheels and tires, vs non rotating weight. Is there is significant difference?

I'd rather ride a heavy frame with light wheels than the other way around.

Let my try hard to understand your approach. I'm in full support of this idea to make the bike lighter, but like many mentioned alrteady the most important direction is to make lighter parts that rotate - wheels, crankset
.
Wheels first. I do not know what is your idea of light wheels and how much you need to spend for them, but to reduce weight by 1.5-2 lbs compare to what you probably have, $250 can be enough. Wabi wheels plus decent 190g tires can possibly do it for you.
To achieve the same weight loss by changing static parts like seatpost, stem, handlebar, saddle, fork can exceed the price of the whole bike with the wheels I mentioned.

Of course anything is doable with enough cash and time, but to me, it looks like you are going to start the hard way...

Yep

so true.

I checked the Wabi Wheels for weight. They are 1750 grams. For about double the price you mentioned a local shop can build a wheel set under 1400 grams. I would rather save my money for a while to get the lighter wheels than purchase the heavier Wabi wheels now. Until I can afford the lighter wheels I plan to start shopping around for super deals on very light cockpit items. If I cannot find super deals, I will not buy any. I do not plan to just go purchase light items. I did check the price of a ENVE cockpit (stem, post, bar and fork) The price was $1340.00 I just checked to see how much it could cost to compare to what I actually purchase.

A note: The Jamis Sputnik did come with a CF fork. It is not as light as an ENVE, but it is a CF fork.

I would sell that Sputnik for 400, then add 500 and would get Wabi Lightning.
15 lbs bike is a very light bike to me.
But your approach is more fun.

Rotational weight is vastly more important than non-rotational weight.

So in that regard, why not save the money you would be spending on things like bottle cages (negligible effect), so that you could buy lighter wheels even sooner?


I believe this would be cheaper.
You could also probably get away with selling for more than $400.

rotating weight is worth about twice unsprung weight. engine weight is worth exactly a jillion times rotating weight.

Is this an exact figure?

wait a second..this is where I'm puzzled. Sputniks had a CF fork between 2006 and 2009 production years. At that times the weight was between 17 and sub 19 pounds.

You mention your C-dale is 5 lbs lighter...You mean it is 13 lbs?

I'm afraid this is where I have to step aside...

give or take a sliver.

non-rotational mass affects the function linearly, while rotational mass lost affects the function non linearly. Second order if I recall correctly.

So if you drop 3units of non-rotational mass, it causes a change by a factor of 3. If you drop this same mass in regards to rotational weight, it was cause a change by a factor of 9.

One could easily call this a jillion.
Incredibly significant.

This x1000

As far as $ per gram go, tires are the most effective way to reduce weight. On one of my builds it cost about $200 for a wheel that dropped me 200 grams and $29 for a tire that shaved off almost 300 grams. With a decent amount of caution I've been flat free with much thinner tires - depending on how your roads are, some thick urban-armor type tire can be overkill and overweight.

Specifics if anyone cares: Wheelset went from Eighthinch Amelia to a Alex DA28 & All City track hub. Tires went from Thick slick urban elite to serfas seca RS

His pedals add the most weight, I would guess, and it's probably a tiny bit heavier than the listed 18.9 to begin with since it's a 59cm frame.

Question: Why do lots of people measure their bikes' weight without pedals? Is there something about pedal weight that's irrelevant or is it just a little way to increase your bragging rights?

Oh... I missed it. TY for clarifying.

It is probably because pedals "come" with the rider...not with the bike.

The Sputnik with a carbon fork is a pretty good lightweight frame to start with if it comes stock under 20 lbs. Would make more sense to me to put lighter bits on that than to sell the whole thing and get an entirely different bike when people have builds of this one that come in at 16lbs particularly if you like the bike and the fit. Also pedal wise, plastic BMX platforms are really light iand comfortable if you don't want to go clipless .

It is all about money. I heard some enormous numbers ... while there is already 15 lbs bike out there that may cost just $300 to get.
Geometry wise Sputnik and Wabi are not far apart. I do not see them to be entirely different.