Park Tool DS-1 Digital scale discrepancies...

Discuss light weight issues concerning road bikes & parts.
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octave
Posts: 89
Joined: Sun Jan 15, 2017 8:47 pm

by octave

so i have a park tool digital scale (the DS-1), and i always used to just hold it stead in my two hands to weight my bikes. but, i just recently got a park tool repair stand (the PCS-10), so of course i decided to no longer weigh by holding it, but to clamp the scale in the stand and weigh like that. this has resulted in a 200 grams difference between holding it by hand and having it clamped in the stand ( it is 200 lighter in the stand).

what is going with that? which measurement is correct?

thanks!

o

Delorre
Posts: 938
Joined: Sat May 24, 2014 12:09 pm

by Delorre

I would trust the measure from the stand more, a lot more steady!!

octave
Posts: 89
Joined: Sun Jan 15, 2017 8:47 pm

by octave

Delorre wrote:I would trust the measure from the stand more, a lot more steady!!


yeah that is what i was thinking, but i just wanted to make sure there wasn't some sort of calibration or something i had to do depending on how it was mounted/held.

gurk700
Posts: 58
Joined: Fri Jan 20, 2017 7:40 pm

by gurk700

How you reset is very important. If you hold it from the handle and weight lifting from the cord, it may show a very skewed result. If you reset properly, clamped via handle on stand, lift from cord by hand or hang from cord from a stationary object should all yield same result.

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oldnslow2
Posts: 220
Joined: Wed Feb 03, 2016 1:50 pm

by oldnslow2

The shape is designed to mount on a steady stand.

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Rick
Posts: 2032
Joined: Sat Aug 29, 2009 4:30 pm

by Rick

Your hand just isn't really steady enough for a precise measurement.
A 20 oz fish...maybe OK
A 15 lb bike: no way.

octave
Posts: 89
Joined: Sun Jan 15, 2017 8:47 pm

by octave

Rick wrote:Your hand just isn't really steady enough for a precise measurement.
A 20 oz fish...maybe OK
A 15 lb bike: no way.



thank you all for the replies-- i am glad it is just the stability factor and not something weird with my scale. i will stop trying to be a tough guy from now on. ;)

glad i got the stand, though, as now all my bikes are 200 grams lighter...!!


o

kode54
Posts: 1186
Joined: Tue May 23, 2006 9:39 pm

by kode54

Rick wrote:Your hand just isn't really steady enough for a precise measurement.
A 20 oz fish...maybe OK
A 15 lb bike: no way.


there's no 15 lb bikes here...this is weight weenies.
- AX Lightness Vial EVO D + DA9150 + Enve SES 3.4 carbon hubs
- Parlee Altum + DA9150 + Enve SES 4.5 carbon hubs
- Parlee ESX + DA9150 + THM SRM PM + Enve SES 6.7 CK hubs
- Independent Fabrication Ti FLW + DA9100 + Enve 3.4 CK hubs

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oldnslow2
Posts: 220
Joined: Wed Feb 03, 2016 1:50 pm

by oldnslow2

octave wrote:as now all my bikes are 200 grams lighter...!!


o

Let us know how much faster yo now are ;)

2old4this
Posts: 327
Joined: Mon Jan 13, 2014 7:26 am

by 2old4this

I had a similar experience with PCS-10. Depending on where I hooked the bike from (middle of the top tube vs the saddle) the measured weight had 2-3 oz difference (BTW, I got a replacement and had the same experience.) I am guessing the issue is caused by having a wide two hooked design. When the center of gravity shifts, the hooks can easily touch the inner side of the handle, affecting the measurement.
Ended up returning it back...

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