Go Back  Bike Forums > Bike Forums > General Cycling Discussion
Reload this Page >

How to weigh a bike?

Notices
General Cycling Discussion Have a cycling related question or comment that doesn't fit in one of the other specialty forums? Drop on in and post in here! When possible, please select the forum above that most fits your post!

How to weigh a bike?

Old 05-28-20, 08:16 AM
  #51  
Road Fan
Senior Member
 
Road Fan's Avatar
 
Join Date: Apr 2005
Location: Ann Arbor, MI
Posts: 16,368

Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8

Mentioned: 46 Post(s)
Tagged: 0 Thread(s)
Quoted: 1651 Post(s)
Liked 537 Times in 403 Posts
Originally Posted by ivangohome View Post
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 is offline  
Old 05-28-20, 08:28 AM
  #52  
Road Fan
Senior Member
 
Road Fan's Avatar
 
Join Date: Apr 2005
Location: Ann Arbor, MI
Posts: 16,368

Bikes: 1980 Masi, 1984 Mondonico, 1984 Trek 610, 1980 Woodrup Giro, 2005 Mondonico Futura Leggera ELOS, 1967 PX10E, 1971 Peugeot UO-8

Mentioned: 46 Post(s)
Tagged: 0 Thread(s)
Quoted: 1651 Post(s)
Liked 537 Times in 403 Posts
Originally Posted by hillyman View Post
Just make up your own weight. I suspect cyclist are as big of liars as fishermen
Certainly cycle makers are!
Road Fan is offline  
Old 05-28-20, 08:29 AM
  #53  
DrIsotope
Non omnino gravis
 
DrIsotope's Avatar
 
Join Date: Feb 2015
Location: SoCal, USA!
Posts: 8,553

Bikes: Nekobasu, Pandicorn, Lakitu

Mentioned: 119 Post(s)
Tagged: 0 Thread(s)
Quoted: 4904 Post(s)
Liked 1,728 Times in 956 Posts
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.
__________________
DrIsotope is offline  
Likes For DrIsotope:
Old 05-28-20, 08:46 AM
  #54  
GlennR
On Your Left
 
GlennR's Avatar
 
Join Date: Nov 2011
Location: Long Island, New York, USA
Posts: 8,373

Bikes: Trek Emonda SLR, Sram eTap, Zipp 303

Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 3004 Post(s)
Liked 2,429 Times in 1,184 Posts
Originally Posted by DrIsotope View Post
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?
GlennR is offline  
Old 05-28-20, 08:51 AM
  #55  
phughes
Senior Member
 
phughes's Avatar
 
Join Date: Mar 2011
Posts: 2,690
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 859 Post(s)
Liked 975 Times in 569 Posts
Originally Posted by GlennR View Post
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.
phughes is offline  
Old 05-28-20, 08:52 AM
  #56  
DrIsotope
Non omnino gravis
 
DrIsotope's Avatar
 
Join Date: Feb 2015
Location: SoCal, USA!
Posts: 8,553

Bikes: Nekobasu, Pandicorn, Lakitu

Mentioned: 119 Post(s)
Tagged: 0 Thread(s)
Quoted: 4904 Post(s)
Liked 1,728 Times in 956 Posts
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.
__________________
DrIsotope is offline  
Old 05-28-20, 10:15 AM
  #57  
phughes
Senior Member
 
phughes's Avatar
 
Join Date: Mar 2011
Posts: 2,690
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 859 Post(s)
Liked 975 Times in 569 Posts
I think I would cry if I knew how much my Surly LHT weighed.
phughes is offline  
Old 05-28-20, 11:10 AM
  #58  
Kapusta
Advanced Slacker
 
Kapusta's Avatar
 
Join Date: Feb 2017
Posts: 5,830

Bikes: Soma Fog Cutter, Surly Wednesday, Canfielld Tilt

Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 2595 Post(s)
Liked 2,299 Times in 1,299 Posts
Originally Posted by phughes View Post
I think I would cry if I knew how much my Surly LHT weighed.
Never weigh a Surly.
Kapusta is online now  
Old 05-28-20, 11:14 AM
  #59  
phughes
Senior Member
 
phughes's Avatar
 
Join Date: Mar 2011
Posts: 2,690
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quoted: 859 Post(s)
Liked 975 Times in 569 Posts
Originally Posted by Kapusta View Post
Never weigh a Surly.
phughes is offline  
Old 05-29-20, 05:28 PM
  #60  
Freerojo
Junior Member
 
Join Date: May 2008
Posts: 171

Bikes: 1997 Specialized Hardrock GX, 2008 Specialized Roubaix Triple 105, 1996 Cannondale RT2000 tandem

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 43 Post(s)
Liked 17 Times in 12 Posts
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.
Freerojo is offline  
Old 05-30-20, 07:39 AM
  #61  
Night Treker
Senior Member
 
Join Date: May 2020
Location: Detroit area Michigan
Posts: 75

Bikes: Trek 1200 Specialized HardRock Hybrid GT Tempest MTB

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 14 Times in 13 Posts
How about the scale at your local truck stop ?
Night Treker is offline  
Old 05-30-20, 10:49 AM
  #62  
Last ride 76 
1/2 as far in 2x the time
 
Last ride 76's Avatar
 
Join Date: Nov 2013
Location: Northern Bergen County, NJ
Posts: 1,935

Bikes: Yes, Please.

Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 499 Post(s)
Liked 283 Times in 220 Posts
Originally Posted by indyfabz View Post
Makes it easier to wash in the shower.
Heck no, that's where I store my wheels.
__________________
I seem to have lost what little mind I had left before this all started.
Last ride 76 is offline  
Old 05-30-20, 10:58 AM
  #63  
fietsbob
Banned
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Posts: 43,599

Bikes: 8

Mentioned: 197 Post(s)
Tagged: 0 Thread(s)
Quoted: 7607 Post(s)
Liked 1,343 Times in 850 Posts
Originally Posted by ivangohome View Post
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,
fietsbob is offline  
Old 05-30-20, 12:25 PM
  #64  
ivangohome
Junior Member
Thread Starter
 
Join Date: May 2020
Location: ****tsford, B.C., Canada
Posts: 17

Bikes: A 26" custom folding dual-susp. MTB, and an upgraded Cannondale Adventurer 4

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Liked 3 Times in 3 Posts
Originally Posted by msu2001la View Post
...wheel it into an LBS and ask them to weigh it.
I like that idea, will do next time I go there!
ivangohome is offline  
Old 05-30-20, 07:15 PM
  #65  
GeneO 
Senior Member
 
GeneO's Avatar
 
Join Date: May 2010
Location: midwest
Posts: 2,520

Bikes: 2018 Roubaix Expert Di2, 2016 Diverge Expert X1

Mentioned: 14 Post(s)
Tagged: 0 Thread(s)
Quoted: 479 Post(s)
Liked 143 Times in 98 Posts
Originally Posted by phughes View Post
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,
GeneO is offline  
Old 06-01-20, 11:24 AM
  #66  
glennwegner
Newbie
 
Join Date: Sep 2010
Posts: 12
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Liked 0 Times in 0 Posts
Originally Posted by ivangohome View Post
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.
glennwegner is offline  
Old 06-01-20, 01:01 PM
  #67  
livedarklions
High Performance Noodler
 
livedarklions's Avatar
 
Join Date: Jun 2018
Location: New England
Posts: 14,439

Bikes: Serotta Atlanta; 1994 Specialized Allez Pro; Giant OCR A1; SOMA Double Cross Disc; 2022 Allez Elite mit der SRAM

Mentioned: 62 Post(s)
Tagged: 0 Thread(s)
Quoted: 7604 Post(s)
Liked 7,972 Times in 4,474 Posts
Originally Posted by Road Fan View Post
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 is offline  
Old 06-01-20, 01:04 PM
  #68  
livedarklions
High Performance Noodler
 
livedarklions's Avatar
 
Join Date: Jun 2018
Location: New England
Posts: 14,439

Bikes: Serotta Atlanta; 1994 Specialized Allez Pro; Giant OCR A1; SOMA Double Cross Disc; 2022 Allez Elite mit der SRAM

Mentioned: 62 Post(s)
Tagged: 0 Thread(s)
Quoted: 7604 Post(s)
Liked 7,972 Times in 4,474 Posts
Originally Posted by ivangohome View Post
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.
livedarklions is offline  
Old 06-01-20, 07:32 PM
  #69  
clongwill
ChristopherL
 
Join Date: Jan 2014
Location: Pittsburgh, PA
Posts: 35

Bikes: '62 Peugeot PA 10, '73 Peugeot UO8, '74 Peugeot UE8 (converted to UO8 look alike), '75 Peugeot UO8, Peugeot Ventoux PH501, '7? Sekine SHS 271, '89 Centurion Ironman Master, '86 Centurion Elite RS, '87 Centurion Ironman Master

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 12 Post(s)
Liked 7 Times in 5 Posts
Me thinks, THE WINNER ! ! !
clongwill is offline  
Old 06-01-20, 09:00 PM
  #70  
vane171
Senior Member
 
Join Date: May 2020
Posts: 490
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 252 Post(s)
Liked 66 Times in 48 Posts
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.

Last edited by vane171; 06-01-20 at 09:04 PM.
vane171 is offline  
Old 06-02-20, 04:09 PM
  #71  
greggh
Junior Member
 
Join Date: May 2020
Posts: 13
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 3 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
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....
greggh is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.