Why would computer mount affect elevation readings?
06-22-25 | 11:59 AM
#26
aka Tom Reingold
Joined: Jan 2009
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From: New York, NY, and High Falls, NY, USA
Bikes: 1962 Rudge Sports, 1971 Raleigh Super Course, 1971 Raleigh Pro Track, 1974 Raleigh International, 1975 Viscount Fixie, 1982 McLean, 1996 Lemond (Ti), 2002 Burley Zydeco tandem
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Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
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Tom Reingold, tom@noglider.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
“When man invented the bicycle he reached the peak of his attainments.” — Elizabeth West, US author
Please email me rather than PM'ing me. Thanks.
06-22-25 | 06:44 PM
#27
Senior Member
Joined: May 2021
Posts: 3,135
Likes: 2,342
From: San Francisco
Bikes: addict, aethos, creo, vanmoof, sirrus, public ...
despite all the variables, i do find the relationship between power and speed and grade very, very consistent and reliable. more reliable than the altitude or map elevation readout on a device... 200w and 5mph = 9%, 200w and 10mph = 4%.
06-24-25 | 01:08 AM
#28
Highly Enriched Driftium
Joined: Apr 2017
Posts: 6,715
Likes: 2,174
I don't have a computer, but grade would be useful to me when on a long ride in unfamilar terrain, bonking on a long upgrade, where I say to myself, "Dang, I thought my granny gear was good enough for X% grade... what is this grade? Really? Jeez, feels steeper than that."
06-24-25 | 03:15 AM
#29
Newbie
Joined: Sep 2019
Posts: 66
Likes: 239
From: Greyton South Africa
Bikes: Epic Evo expert and Topstone Lefty 1
it is not the mount but the vibrations which affects a certain batch of Karoo 2s...I have had 2 with the same problem and they are due to some faulty hardware which they rectified in later models...
Do the same ride with the Karoo in your back pocket and see how much more accurate the total elevation becomes..
A mount which is more prone to vibrations will give a far worse reading than one mounted directly above the steerer...
It has nothing to do with blocked barometric sensor holes, wind, temp, etc....simply vibrations...
Hammerhead admitted a batch of these Karoo 2s had this problem and will replace them under warranty...unfortunately the 2nd unit I got had the same issue
Do the same ride with the Karoo in your back pocket and see how much more accurate the total elevation becomes..
A mount which is more prone to vibrations will give a far worse reading than one mounted directly above the steerer...
It has nothing to do with blocked barometric sensor holes, wind, temp, etc....simply vibrations...
Hammerhead admitted a batch of these Karoo 2s had this problem and will replace them under warranty...unfortunately the 2nd unit I got had the same issue
Last edited by guidodg; 06-24-25 at 03:18 AM.
06-24-25 | 07:36 AM
#30
Thread Starter
Full Member
Joined: Jun 2013
Posts: 461
Likes: 92
From: Mississauga ON
Bikes: #1 Colnago #2 Factor #3 Yoeleo
it is not the mount but the vibrations which affects a certain batch of Karoo 2s...I have had 2 with the same problem and they are due to some faulty hardware which they rectified in later models...
Do the same ride with the Karoo in your back pocket and see how much more accurate the total elevation becomes..
A mount which is more prone to vibrations will give a far worse reading than one mounted directly above the steerer...
It has nothing to do with blocked barometric sensor holes, wind, temp, etc....simply vibrations...
Hammerhead admitted a batch of these Karoo 2s had this problem and will replace them under warranty...unfortunately the 2nd unit I got had the same issue
Do the same ride with the Karoo in your back pocket and see how much more accurate the total elevation becomes..
A mount which is more prone to vibrations will give a far worse reading than one mounted directly above the steerer...
It has nothing to do with blocked barometric sensor holes, wind, temp, etc....simply vibrations...
Hammerhead admitted a batch of these Karoo 2s had this problem and will replace them under warranty...unfortunately the 2nd unit I got had the same issue
Also, this unit being few years old is definitely NOT covered by the warranty any longer.
06-24-25 | 11:41 PM
#32
Newbie
Joined: Sep 2019
Posts: 66
Likes: 239
From: Greyton South Africa
Bikes: Epic Evo expert and Topstone Lefty 1
