Wahoo RPM ???

rickypj

Hi everyone, I have been looking at buying a cadence/speed sensor and a bike computer to display the numbers and have decided to go for the Wahoo RFLKT display and Bluetooth speed cadence sensor and maybe HRM but have just found some info on a new Wahoo Bluetooth cadence only sensor that works using accelerometers inside a small device you stick on the crank arm. There is no speed pickup but the head unit gets this from your phones gps. Is anybody here using this already or has any idea where to buy one? I've found reviews by dcrainmaker and it's featured on other blogs but can't find it for sale even on the wahoo website.

http://www.dcrainmaker.com/2013/09/fitn ... ntrol.html

DiscoBoy

Is there a reason why you want to use Bluetooth stuff instead of the more usual ant+?

rickypj

I presumed it was newer technology? Maybe I'm wrong. Also the Bluetooth would connect straight to my iPhone for other uses such as running without having to buy a ant+ bridge. Also I think I read that the batteries last longer.

Initialised

ANT+ is designed for Military, Industrial and Medical Telemetery, BlueTooth is designed for consumer use and uses a less robust protocol and is much less susceptible to interference.

Shame you got an iPhone, loads of Sony Android phones already support ANT+
http://www.thisisant.com/directory/filter/~/60/~/

DiscoBoy

rickypj wrote:

I presumed it was newer technology? Maybe I'm wrong. Also the Bluetooth would connect straight to my iPhone for other uses such as running without having to buy a ant+ bridge. Also I think I read that the batteries last longer.

The battery thing is irrelevant, the battery in my garmin speed and cadence sensor lasts ages.

What do you want your computer to do? Do you just want instantaneous display? Or do you want logging?

If you want logging, then the way to go is with something GPS enabled like a garmin 200 or 500. Get a 500 if you want (or will want) cadence and heart rate data.

If you don't want logging, then loads of computers have a cadence sensor.

rickypj

DiscoBoy wrote:

rickypj wrote:

I presumed it was newer technology? Maybe I'm wrong. Also the Bluetooth would connect straight to my iPhone for other uses such as running without having to buy a ant+ bridge. Also I think I read that the batteries last longer.

The battery thing is irrelevant, the battery in my garmin speed and cadence sensor lasts ages.

What do you want your computer to do? Do you just want instantaneous display? Or do you want logging?

If you want logging, then the way to go is with something GPS enabled like a garmin 200 or 500. Get a 500 if you want (or will want) cadence and heart rate data.

If you don't want logging, then loads of computers have a cadence sensor.

I more after knowing if anybody else has got the wahoo RPM and if so where from? I know about the garmin and think that as I will always have my iPhone with me whilst out then it seems daft to spend extra money on a computer/head unit with gps and the brains and not use the iPhones capabilities. I only want to log on strava.

Markjaspi

Hi, I use a Wahoo RFLKT with the Bluetooth and cadence, I've had no issues with interference etc.

You can use the head set to reflect the app without the blue sensor, but it does not allow the auto stop feature and I found this is necessary to show accurate / similar average speed once the TCX file has synced with strava.

You can now get an ant+ version if you prefer to get a different cadence sensor, however you are right that the Bluetooth connection uses less of your phone's battery (I used mine for the Manchester 100 for approx. 4 hours with no issue).

I bought mine directly off their website, but had to pay import tax and wait a while, there's some pretty good deals on ebay at the moment.

Hope this helps, if you need to ask anything further, please ask.

rickypj

Markjaspi wrote:

Hi, I use a Wahoo RFLKT with the Bluetooth and cadence, I've had no issues with interference etc.

You can use the head set to reflect the app without the blue sensor, but it does not allow the auto stop feature and I found this is necessary to show accurate / similar average speed once the TCX file has synced with strava.

You can now get an ant+ version if you prefer to get a different cadence sensor, however you are right that the Bluetooth connection uses less of your phone's battery (I used mine for the Manchester 100 for approx. 4 hours with no issue).

I bought mine directly off their website, but had to pay import tax and wait a while, there's some pretty good deals on ebay at the moment.

Hope this helps, if you need to ask anything further, please ask.

Thanks for your reply. And thanks for answering my question. I have seen the rflkt+ it has a thermometer and altitude plus a ant bridge so it seems a better bit of kit than the rflkt but you can still use Bluetooth devices with it.
I still can't find the wahoo RPM for sale anywhere. Having one of these would make it a tidy setup as you wouldn't need to strap a sensor to your chain stay. Speed would be worked out via the phones gps position.

Markjaspi

Don't think they do one just for RPM, it's the blue SC that attaches to the chain stay and with out that ( if you use the wahoo app) you will have to manually pause when you stop or buy something like the "cyclemeter" app which can auto pause with just GPS, but either way without an ant+ or blue SC you won't get cadence .

Markjaspi

Also once you install the blue SC it takes that data for the speed reading and only uses GPS as a back up for speed. You would need to set up the wheel dia I.e 700 x 23 to get the correct speed, dependant on your tyre size.

I found that the wahoo app is the best to use ( I tried it, strava and cyclemeter) as you can customise your pages and buttons better, although you do need to Import to strava so you can read your data more in depth.

rickypj

Markjaspi wrote:

Also once you install the blue SC it takes that data for the speed reading and only uses GPS as a back up for speed. You would need to set up the wheel dia I.e 700 x 23 to get the correct speed, dependant on your tyre size.

I found that the wahoo app is the best to use ( I tried it, strava and cyclemeter) as you can customise your pages and buttons better, although you do need to Import to strava so you can read your data more in depth.

Have a look at the link in my original post. You will see the cadence only sensor there.
It's new to market saving having to have 2 magnets attached you ur bike. One sensor on crank arm only

Markjaspi

Just when I thought I don't need to spend any more cash!

There's nothing listed In the support app shop, I might send them an email to see if this has been launched yet, maybe it's still in full development?

rickypj

I had a play around today on google and managed to find a page that I couldn't find through the normal menus on there web page that had all the details on it and also a purchase option but lists as out of stock. It will be sold as unit on its own or as a bundle with the rflkt+. I've attached part of it but can't find the full page
https://www.wahoofitness.com/instructions/rpm

rickypj

Markjaspi wrote:

Just when I thought I don't need to spend any more cash!

There's nothing listed In the support app shop, I might send them an email to see if this has been launched yet, maybe it's still in full development?

Also I emailed them but haven't a reply yet. I will keep you informed

markhewitt1978

Been looking at the RPM as I coudn't persuade the SC sensors to stay attached to my chainstay in any reliable way (Scott CR1 has funny flattened stays). But it looks like it's not available to buy in any of the usual suspects such as Wiggle or Amazon. You can get it shipped directly from the USA.