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Weighing your bike

Old 07-11-20, 07:24 PM
  #1  
gios
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Weighing your bike

Did a search and did not get a hit.

How do you weigh you bike? I guess I could weigh myself and then weigh myself carrying the bike and subtract the difference.
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Old 07-11-20, 08:12 PM
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Go to a WalMart with $13


https://www.walmart.com/ip/Pocket-Di...erId=101001360
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Old 07-11-20, 08:14 PM
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Or go to a Tractor Supply with around $23 for the analog, old-school version;


https://www.tractorsupply.com/tsc/pr...duct-_-1020593
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Old 07-12-20, 12:13 PM
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Originally Posted by gios View Post

How do you weigh you bike? I guess I could weigh myself and then weigh myself carrying the bike and subtract the difference.
Yep, that's what many veterinarians do when weighing pets.

Or, use a bathroom scale with some wood (or book, or magazines, or . . . ) the same height of the scale, and set it all on level ground. Then put one bike wheel on the scale and one bike wheel on the wood. Then reverse the bike with the opposite wheel on the scale and the other tire on the wood.

Add up both weights and that ought to be close enough. Unless you have a flyweight bike that is too light for the range you're weighing on a bathroom scale. In that case, might need to use a kitchen scale.

Electronic is best in either case than the analog dial type, IMO.
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Old 07-12-20, 12:17 PM
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Add it up, component by component. duh.
https://weightweenies.starbike.com/listings.php

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Old 07-12-20, 01:01 PM
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Get a pair of cheap kitchen scales off of Amazon, then your weight will even have F/R distribution. Weigh the bike, then take one of the scales into the house and keep it in the kitchen, leave the other in the workshop.You can weigh food on one and bike parts on the other.

A luggage scale, on the other hand, will usually sit in a drawer until the batteries die.
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Old 07-12-20, 05:33 PM
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The bike is not the over-weight component, btw...
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Old 07-12-20, 09:43 PM
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I just add up the different component weights in my head.

My gravel bike weights 3 pounds 10 ounces.
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Old 07-12-20, 11:51 PM
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I don’t worry about bike weight. If I gain a few pounds I know exactly why it is beer and Tex-Mex food I have used a fish scale to weigh bikes not the scales on the fish..
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Old 07-13-20, 03:12 PM
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I stand my bike up on its rear wheel on my old, non-digital bathroom scale, and try to near-balance it while reading the number.
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Old 07-13-20, 05:47 PM
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Originally Posted by RubeRad View Post
I stand my bike up on its rear wheel on my old, non-digital bathroom scale, and try to near-balance it while reading the number.
Why not weigh yourself while holding the bike, then just yourself. The difference is your bike. I do this on occasion when weighing my dogs. My bike doesn't wiggle as much.
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Old 07-13-20, 05:53 PM
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Fish or luggage scale.
I'd use my bathroom scale, but it's upstairs and my bikes are in the basement.

It puts the lotion on its chain, else it gets the hose again!
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Old 07-13-20, 05:56 PM
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Why not weigh yourself while holding the bike, then just yourself. The difference is your bike. I do this on occasion when weighing my dogs. My bike doesn't wiggle as much.

Yeah there's that too. I'm kind of put off by the fact that when I get on the scale even naked, it cries.
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Old 07-14-20, 05:08 AM
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Are you afraid the bike gained any weight?
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Old 07-14-20, 09:58 AM
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Originally Posted by DrIsotope View Post
Get a pair of cheap kitchen scales off of Amazon, then your weight will even have F/R distribution. Weigh the bike, then take one of the scales into the house and keep it in the kitchen, leave the other in the workshop.You can weigh food on one and bike parts on the other.

A luggage scale, on the other hand, will usually sit in a drawer until the batteries die.
These won't work for most people, since typical kitchen scales have a max load of around 20 - 30 lbs.

Unless you plan on weight just your bike. But front/rear weight distribution is meaningless without the rider on the bike.
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Old 07-14-20, 10:36 AM
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Yeah I measured F/R distribution once, brought the bike into a hallway and sat on it with the scale under the rear wheel and then under the front wheel. I was very rear heavy, like 70/30. Which is not surprising, because my rear is very heavy
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Old 07-14-20, 11:00 AM
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I thought you could determine your bike's weight using a rope, but it looks like I was wrong.

I was thinking you'd make a pendulum from your bike and a tree, and then be able to derive the weight from the period. I was close but no dice. This will let you measure gravity, but not the mass of the bike.
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Old 07-14-20, 11:09 AM
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Originally Posted by Notso_fastLane View Post
These won't work for most people, since typical kitchen scales have a max load of around 20 - 30 lbs.

Unless you plan on weight just your bike. But front/rear weight distribution is meaningless without the rider on the bike.
The weight of the bike is meaningless regardless of how you weigh it. May as well waste your time in such a way as to leave you with useful scales afterward.

There's absolutely no such thing as static F/R distribution with a rider on a bike, so you could never measure that anyway. Tipping your head forward or flaring your elbows would change the distribution.
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Old 07-14-20, 11:28 AM
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At any one moment ..

You can weigh it, or you can ride it , but you have to choose.
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Old 07-14-20, 11:33 AM
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Once the bikes are boxed for shipping I weigh them with a bathroom scale & write the number on the box

Rounding UP, on weight and measurements, because they penalize you - $ - if you try to lower cost by understating the data.
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Old 07-15-20, 07:09 AM
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Originally Posted by DrIsotope View Post
The weight of the bike is meaningless regardless of how you weigh it. May as well waste your time in such a way as to leave you with useful scales afterward.

There's absolutely no such thing as static F/R distribution with a rider on a bike, so you could never measure that anyway. Tipping your head forward or flaring your elbows would change the distribution.
I ride recumbents, where the F/R weight distribution is almost fixed. For me it can matter, especially in my velomobile.

There are some threads around here where riders in their 'default' riding position like to optimize their tire pressures based on the F/R distribution. I think that's way overthinking things, but there it is.
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Old 07-15-20, 09:13 PM
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Originally Posted by ahsposo View Post
I've had one of these for donkey's years, very accurate too.
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Old 07-16-20, 04:48 AM
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Originally Posted by Seattle Forrest View Post
I thought you could determine your bike's weight using a rope, but it looks like I was wrong.

I was thinking you'd make a pendulum from your bike and a tree, and then be able to derive the weight from the period. I was close but no dice. This will let you measure gravity, but not the mass of the bike.
I applaud your quest for knowledge via science and experimentation. What's next?
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Old 07-16-20, 09:05 AM
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Originally Posted by gios View Post
weigh myself carrying the bike
That is all you need. No fancy math, no fancy scales.
Check in every week or so at the same time of day to monitor change.
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Old 07-16-20, 09:29 AM
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Originally Posted by Seattle Forrest View Post
I thought you could determine your bike's weight using a rope, but it looks like I was wrong.

I was thinking you'd make a pendulum from your bike and a tree, and then be able to derive the weight from the period. I was close but no dice. This will let you measure gravity, but not the mass of the bike.
Don't know how I missed the opportunity to pounce on this physics error. Pendulum period is all about length, not mass. SF why are you such a science-denier?
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