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-   -   How to weigh a bike? (https://www.bikeforums.net/general-cycling-discussion/1202676-how-weigh-bike.html)

Road Fan 05-28-20 08:16 AM


Originally Posted by ivangohome (Post 21497999)
I can't disagree! But I have these odds and ends here that I'd rather put to work for the money.

I use a digital bathroom scale. First I get on it and weigh myself, writing down the result (on disposable paper so I don't have to look at the number when done!!!.

Reset the scale if it needs it, then grab the bike. Holding it, step on the scale again.get off and write down that number.

Subtract the two numbers. The bike weight is the difference between the two. Most modern scales are good to 1/10 lb or to show lb and ounces, so for me that's enough resolution. I don't expect to get grams accurately when I'm putting nearly 100 kg on the scale.

Write down the bike weight and throw away the scraps of paper, to destroy the evidence.

Road Fan 05-28-20 08:28 AM


Originally Posted by hillyman (Post 21498531)
Just make up your own weight. I suspect cyclist are as big of liars as fishermen

Certainly cycle makers are!

DrIsotope 05-28-20 08:29 AM

Here's a thought project for you: what do you learn by knowing how much the bike weighs? In what magical ways does your life change?

I can honestly say I have no accurate idea what any of my bikes weigh. Some are over 20lbs. One is probably under 20lbs. I don't think any of them crack 30lbs.

If I had the precise numbers written down, nothing would change. Bike weights and miles ridden do seem to come out as inversely proportionate on BF, though.

GlennR 05-28-20 08:46 AM


Originally Posted by DrIsotope (Post 21501860)
Bike weights and miles ridden do seem to come out as inversely proportionate on BF, though.

OUCH ;)

It's like know horsepower of your car, it's something to talk about. But you are correct that it doesn't change anything. If you like the bike will you like it more?

phughes 05-28-20 08:51 AM


Originally Posted by GlennR (Post 21501535)
Is there really much difference between 30 and 31 pounds? ;)

Uhm, no, that was my original point with my first post saying to use the bathroom scale. I was just answering a post regarding using Google to figure out how how many ounces in a pound. Which is totally unnecessary considering 1. No need, and 2. It's not rocket science so I could do that calculation in my head or at the most use a calculator.

So I agree, there is no difference in my opinion between 30 and 31 pounds.

DrIsotope 05-28-20 08:52 AM

I like a bike for how it rides. Unless the weight is so high that it's noticeable (which for me seems to be in the low-30s-- I had a sluggo C-Dale hybrid that was like 34lbs dry) I don't care. Whatever one of my bikes weighs, add at least 5lbs for water (sometimes more in the summer,) then 215lbs of meat to make it move. The weight of the bike? Two categories: too much, and just fine. Luckily, everything in the stable is just fine.

phughes 05-28-20 10:15 AM

I think I would cry if I knew how much my Surly LHT weighed. :lol:

Kapusta 05-28-20 11:10 AM


Originally Posted by phughes (Post 21502098)
I think I would cry if I knew how much my Surly LHT weighed. :lol:

Never weigh a Surly.

phughes 05-28-20 11:14 AM


Originally Posted by Kapusta (Post 21502224)
Never weigh a Surly.

:thumb: :lol:

Freerojo 05-29-20 05:28 PM

You could buy a luggage scale which even has a hook to hang from and a big hook to hang a wheel on. They’re cheap.

Night Treker 05-30-20 07:39 AM

How about the scale at your local truck stop ?

Last ride 76 05-30-20 10:49 AM


Originally Posted by indyfabz (Post 21499826)
Makes it easier to wash in the shower.

Heck no, that's where I store my wheels.:o

fietsbob 05-30-20 10:58 AM


Originally Posted by ivangohome (Post 21497962)
What's the best makeshift scale for weighing a bike? Kg or lbs, doesn't matter.

I ask as I have recently acquired a good-condition Supercycle Hooligan Downhill MTB, and I suspect it's in good-condition because no one can ride it due to the weight.

hold it in your hands, step on a bathroom scale, step back on the scale without the bike in your hands , before or after ..

subtract the without from the with.. simple Math,

ivangohome 05-30-20 12:25 PM


Originally Posted by msu2001la (Post 21498471)
...wheel it into an LBS and ask them to weigh it.

I like that idea, will do next time I go there!

GeneO 05-30-20 07:15 PM


Originally Posted by phughes (Post 21498036)
Is it really difficult to stand on a scale and lift the bike? I never found it to be a problem.

It actually has an advantage. If you use a hanging scale that is not calibrated absolutely, say it weighs a couple pounds too heavy, then your result will be off by that much. if your bathroom scale is similarly off, when you weigh yourself+bike and subtract yourself, the inaccuracy cancels out. Bathroom scales do not have precise resolution though (maybe 1/2 lb at best?). But to that precision, it is an accurate measurement,

glennwegner 06-01-20 11:24 AM


Originally Posted by ivangohome (Post 21497962)
What's the best makeshift scale for weighing a bike? Kg or lbs, doesn't matter.

I ask as I have recently acquired a good-condition Supercycle Hooligan Downhill MTB, and I suspect it's in good-condition because no one can ride it due to the weight.

Use your bathroom scale. Weigh yourself then weigh yourself holding your bike. The difference is the weight of your bike.

livedarklions 06-01-20 01:01 PM


Originally Posted by Road Fan (Post 21501826)
I use a digital bathroom scale. First I get on it and weigh myself, writing down the result (on disposable paper so I don't have to look at the number when done!!!.

Reset the scale if it needs it, then grab the bike. Holding it, step on the scale again.get off and write down that number.

Subtract the two numbers. The bike weight is the difference between the two. Most modern scales are good to 1/10 lb or to show lb and ounces, so for me that's enough resolution. I don't expect to get grams accurately when I'm putting nearly 100 kg on the scale.

Write down the bike weight and throw away the scraps of paper, to destroy the evidence.


My bike is so light, I weigh less holding it.

livedarklions 06-01-20 01:04 PM


Originally Posted by ivangohome (Post 21506013)
I like that idea, will do next time I go there!


Another thing you can do is drop it from a known height and measure how high it bounces. Probably won't tell you anything, but sounds like a fun afternoon.

clongwill 06-01-20 07:32 PM

Me thinks, THE WINNER ! ! !

vane171 06-01-20 09:00 PM

Did someone suggest Archimedes method? You measure how much water is displaced when you submerge the bike. Then you need to estimate material densities of the various components on the bike, subtract empty volume inside the frame and wheel tubes. I think it would be an interesting project for an engineering class.

greggh 06-02-20 04:09 PM

My bathroom scale has a display that reads out to one tenth of a pound. This would imply a level of precision that it really doesn't have. I can get on and off repeatedly and the numbers are all over the place, varying by almost a pound. I have no idea as to the accuracy. Regarding the fish scale, I've never caught a fish that weighs as much as my bike, so needless to say, my fish scale doesn't go high enough. Maybe if you live on saltwater....


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