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


Go Back   > >

Electronics, Lighting, & Gadgets HRM, GPS, MP3, HID. Whether it's got an acronym or not, here's where you'll find discussions on all sorts of tools, toys and gadgets.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 01-06-14, 09:52 PM   #1
Baki17
Newbie
Thread Starter
 
Join Date: Oct 2013
Bikes:
Posts: 3
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Spin Bike Cadence Sensor and Monitor

Hey guys,

I'm wanting to train indoors for sprint cycling on a spin bike at my local gym. Could someone recommend a good cadence computer and sensor for me on here?

Excuse my noobieness. So from what I understand, you hook the sensor magnet next to the front spinner wheel and the computer detects your RPMs, Watts, etc. Is this how it works?
Baki17 is offline   Reply With Quote
Old 01-07-14, 08:11 AM   #2
Looigi
Senior Member
 
Looigi's Avatar
 
Join Date: Dec 2010
Bikes:
Posts: 8,942
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Not exactly. You put a magnet on the part that moves, wheel for speed/distance, and crank for cadence. Sensors mount on a fixed part of the bike within a cm or so of where the magnet passes and detect it each time it comes around counting revolutions. Give the circumference of wheel/tire, revolutions can be used to calculate distance. Circumference and revolutions per minute (RPM) can be used to calculate speed. Neither give power. Power is the product of torque and RPM and some additional means must be provided to measure torque.
Looigi is offline   Reply With Quote
Old 01-07-14, 08:49 AM   #3
bruin11 
Senior Member
 
Join Date: Jun 2004
Bikes: Lynskey Helix, Serotta Fierta IT, Torelli, Raleigh Carbon Revenio 3.0
Posts: 356
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Doubt if you are going to be able to attach a cadence/speed sensor to a gym spin bike.
__________________
bruin11 is offline   Reply With Quote
Old 01-07-14, 08:51 AM   #4
CharlyAlfaRomeo
Senior Member
 
Join Date: Sep 2013
Bikes:
Posts: 619
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
What Looigi said plus you can't put a speed sensor on the flywheel to determine speed without knowing the gearing of the model. Even then the speed reading is completely false as you're not moving your mass through air.

However most spin bikes I've seen already have a computer on them with cadence and approximated speed (not that speed matters when you're stationary, it's a completely useless metric). Many even have a power meter built in.

On another note a spin bike isn't really suited to sprint training as there isn't enough resistance to simulate standing starts etc. Check the bikes where you plan on working out before over thinking this.
CharlyAlfaRomeo is offline   Reply With Quote
Old 01-07-14, 01:27 PM   #5
blacknbluebikes
Senior Member
 
blacknbluebikes's Avatar
 
Join Date: Jul 2013
Location: NJ, USA
Bikes: two blacks, a blue and a white.
Posts: 199
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Actually, I see a lot of electronics on stationary bikes at the gym, such as the Lifecycles and the Expresso bikes, but never any on the spin bikes.
Most people consider them different. Lotta discussion out there, here's a quick summary: What is the practical difference between a spinning and 'regular' stationary exercise bike? | Ask MetaFilter

As Bruin11 said, it's not likely you'll be able to do any kinda mount on the spin bikes. Our gym doesn't even let you use them unless you're in a class. But what I do think might serve you well is to utilize a Heart Rate Monitor - log your time, avg HR and max HR. After a short while, you'll have a very good feel for how much workout you're getting and what kind of aerobic progress you're making.
blacknbluebikes is offline   Reply With Quote
Old 01-07-14, 01:45 PM   #6
Looigi
Senior Member
 
Looigi's Avatar
 
Join Date: Dec 2010
Bikes:
Posts: 8,942
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Yes. Exercise and training is a function of duration and effort. Even when doing structured training on a bike outside, you use effort and duration, not speed or distance. You can used RPE or a HRM for quantifying level of effort, though a power meter is best. A watch or stop watch is good for time. How many time the flywheel of the spin bike rotates is irrelevant and indicative of nothing.
Looigi 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 02:54 PM.