Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Masters Racing (All Disciplines) Race on the track or road or on your mountainbike in the Masters Category? Want to talk tactics, strategy and training with your peers?

User Tag List

Reply
 
Thread Tools Search this Thread
Old 09-04-13, 02:33 PM   #1
mkadam68
Senior Member
Thread Starter
 
mkadam68's Avatar
 
Join Date: Oct 2006
Location: 30 minutes North-West of Los Angeles.
Bikes: 2012 MotorHouse road bike. No. You can't get one.
Posts: 3,678
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quarq SRAM s975 Stopped Functioning

About 6mos ago, picked up a used power meter. Works awesome, ride any wheels I like, etc...

I replaced the large chainring with a SRAM 55t ring for training purposes. Then, about 1mo. ago, it stopped working. Garmin 500 apparently receives no signal whatsoever. I've tried my son's Edge 500 that picks up the signal from his PowerTap, and it doesn't work either.

I'm wondering if the magnet for the s975 has fallen off my frame (appears that way as I cannot see one). Either I knocked it off accidentally or maybe during a crash. Would that prevent the power meter from sending a signal? I thought they were only for calculating cadence and not directly measuring power output. Anyone confirm?
mkadam68 is offline   Reply With Quote
Old 09-04-13, 03:22 PM   #2
Cleave
Old Road Racer
 
Cleave's Avatar
 
Join Date: Jan 2006
Location: SoCal
Bikes: Bicycle Transportation: 2013 Ford Focus Electric, 2010 Toyota Prius
Posts: 5,250
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Hi, I know that my SRM will not send a signal without a "cadence" magnet. The SRM turns off after some period of time if it does not sense the magnet. I am hypothesizing that the Quarq works the same way.
__________________
Thanks.
Cleave
"Real men wear pink."
See my cycling photos at http://www.pbase.com/cleavel/bicycling
See my bikes at http://www.pbase.com/cleavel/mybicycles
Visit my blog at http://cleavesblant.wordpress.com/
Lightning Velo Cycling Club: http://www.lightningvelo.org/
Cleave is offline   Reply With Quote
Old 09-04-13, 04:24 PM   #3
AzTallRider 
I need speed
 
AzTallRider's Avatar
 
Join Date: Sep 2009
Location: Phoenix, AZ
Bikes: Giant Propel, Cervelo P2
Posts: 5,550
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes, the Quarq will give you nothing without the cadence magnet - it won't even turn on. With that Quarq, the magnets are either glued to the frame, typically right behind the BB, or for an external BB, it's attached to a flat ring that goes under the BB cup. If you see nothing, it was probably glued on and fell off. Use good epoxy paste and glue one on. You can download the manual to get instructions.
AzTallRider is offline   Reply With Quote
Old 09-04-13, 04:47 PM   #4
mkadam68
Senior Member
Thread Starter
 
mkadam68's Avatar
 
Join Date: Oct 2006
Location: 30 minutes North-West of Los Angeles.
Bikes: 2012 MotorHouse road bike. No. You can't get one.
Posts: 3,678
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Thanx. Will look into it.
mkadam68 is offline   Reply With Quote
Old 09-06-13, 06:10 PM   #5
shovelhd
Senior Member
 
shovelhd's Avatar
 
Join Date: Jun 2010
Location: Western MA
Bikes: Yes
Posts: 15,527
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 9 Post(s)
Power = torque times rpm. The power meter measures torque. Without cadence, it cannot calculate power.

That said, I had two S975 power meters go bad on me. The last one was replaced under warranty with a Riken. It is a much better unit and has proven to be consistent.
shovelhd is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -6. The time now is 11:13 PM.