BicyclePower Posted March 8, 2015 Author Posted March 8, 2015 Looks like PowerTap have put out a teaser, you can view it here:
Google Posted March 8, 2015 Posted March 8, 2015 looks like a crank, a pedal based unit and one more?
GoLefty!! Posted March 9, 2015 Posted March 9, 2015 well if its not BB based then I'm not interested. Had the hub version and hated the mechanical unreliability.Don't want to change my cranksDon't want to switch from TIME pedals.
Spinnekop Posted March 9, 2015 Posted March 9, 2015 II think if someone can develop something that you "add on" to your existing setup. 4iiii comes to mind.........But then you start playing with accuracy. But how much? But that is the biggest drawback for me. Like GoLefty!! I LOVE my current SI cranks and won't want to do away with them. Same with my Look pedals. And pedals tend to last around 20 000km? year? 2 years? Then you have to chuck them......Long term I think a PM inside the pedals is not an option. To come back on topic.....those cranks in the video looks pretty nice.
Skinnyone Posted March 9, 2015 Posted March 9, 2015 That is/would be the ultimate setup, where nothing on your bike needs complete replacement, but like it has been mentioned, the "user add ons" become inaccurate and therefore useless to a certain degree. from what I can tell from that vid, those look like standard cranks and something built into the spider/chainrings as those look one piece.
GoLefty!! Posted March 9, 2015 Posted March 9, 2015 well if that gets built in DA FC 9000 bolt pattern I'll get one.Still can't see how they would build in left/right balance
Skinnyone Posted March 9, 2015 Posted March 9, 2015 Left/right balance is/would be easily added, the algorithm needs to have a crank position sensor (also known as a cadence sensor) to tell it where the crank is in relation to the power/torque being applied - ALA the older quark and SRM systems.
GoLefty!! Posted March 9, 2015 Posted March 9, 2015 so if I stop the vid at 00:16 secs the image of the cranks shows a similar system to the image LOOK695 posted.It appears though that its a chain ring and power meter assembly which means you replace the chain rings on your bike since the sender unit is also mounted to the rings. So I reckon replacement rings are going to cost a princely sum
LOOK695 Posted March 9, 2015 Posted March 9, 2015 so if I stop the vid at 00:16 secs the image of the cranks shows a similar system to the image LOOK695 posted.It appears though that its a chain ring and power meter assembly which means you replace the chain rings on your bike since the sender unit is also mounted to the rings. So I reckon replacement rings are going to cost a princely sumHoping that if the chainrings are part of the PM that they will be able to be replaced seperately if needed
GoLefty!! Posted March 9, 2015 Posted March 9, 2015 Looks like the power meter will require its own proprietary chain rings.Will chain ring replacement be user executed without need for recalibration? Interesting idea but if it only fits certain cranks sets then I'd be better off with 4iiii precision
Skinnyone Posted March 9, 2015 Posted March 9, 2015 I am sure that a menial task as replacing rings won't need re calibration (unless you change them using a hammer and chisel...) And I don't think they will be any more propriety as say Sram XX1...?
Madone69 Posted March 9, 2015 Posted March 9, 2015 the systems will all be string gauge setups. no algorithms. the pedal system is Look based. either pair both pedals or only one pedal to your head unit.( not sure why the option) the crank is more like a unit fitting onto the crank. cost : pedals + - 10kcrank +- 16k from the PT guys at the expo
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