SRAM eTap
08-26-15, 11:40 AM
#51
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08-26-15, 11:47 AM
#52
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It's a proprietary protocol on the Bluetooth/wifi/ANT+ frequency band, and it has 128-bit encryption. So there is security. As for interference, it could happen, but my ANT+ power data is rock steady even in a peloton of 60 other dudes using ANT+ power meters. Obviously, this is not the exact same thing, and use at a mass production scale is pretty much certain to reveal problems that SRAM's detailed but inevitably limited pre-production testing did not find. But I would not be particularly concerned with interference. We'll see, I guess.
08-26-15, 11:49 AM
#53
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08-26-15, 11:57 AM
#55
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I wonder what just the derailleurs and levers will cost for a conversion...UK price.
08-26-15, 12:02 PM
#56
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Hopefully Campy et al will adopt it soon. Do love the Campag ergonomics...and my Seven does love new swag, although she was made for mech shifting not electronic-so wireless would be just the thing.
08-26-15, 12:10 PM
#58
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And you can buy the seatpost with the battery installed. Most complicated part of the assembly is knowing that you need a little fork tool to plug the connectors in.
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08-26-15, 12:13 PM
#59
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Allegedly last a year. Obviously depends on how much you ride and how much you shift. Based upon how often I replace 2032 batteries in my QuarQ, and Vector pedals, (which admittedly are in more constant use) I'd wager its more frequent than yearly if you ride a lot.
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You could fall off a cliff and die.
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08-26-15, 12:17 PM
#60
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the vid shows a dollar symbol but seeing as theyre a uk based channel im not sure of the currency
08-26-15, 12:46 PM
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I'm guessing that is a joke, but I wonder if they'll ever go that way.
It's one thing to go electronic on shifting, but a whole other to hope the computer stops you from running off a mountain.
Think of the lawsuits.
It's one thing to go electronic on shifting, but a whole other to hope the computer stops you from running off a mountain.
Think of the lawsuits.
Last edited by Jarrett2; 08-26-15 at 12:50 PM.
08-26-15, 02:14 PM
#64
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Originally Posted by Cycling Tips
SRAM say that electromagnetic interference has been well tested in a multitude of environments and they’re confident that AIREA is rock solid against accidental interference, jamming, and hacking. SRAM has reportedly only been able to count a handful of times a mis-shift has occurred in all of their testing.
Sure hacking is theoretically possible, but the transmit/receive radius is approximately 100 meters and each device can only be paired with one other device (if something comes unpaired, the whole system needs to be re-paired). Combined with 128-bit AES encryption, FHSS, and hopefully the lack of will by hackers, SRAM is not concerned about a lack of security in the slightest.
Sure hacking is theoretically possible, but the transmit/receive radius is approximately 100 meters and each device can only be paired with one other device (if something comes unpaired, the whole system needs to be re-paired). Combined with 128-bit AES encryption, FHSS, and hopefully the lack of will by hackers, SRAM is not concerned about a lack of security in the slightest.
From: Will wireless shifting be a game-changer? SRAM introduces eTAP | CyclingTips
08-26-15, 02:43 PM
#65
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Making it easier to swap out batteries, since they are detached in seconds. They are heavier than the derailleurs them selves, I would look into a race day battery.
08-26-15, 03:05 PM
#66
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On the type of race where a tiny bit of weight savings might be of concern, i.e. long hilly road race, you'd want a fair amount of capacity. So you're "race day battery, you'd still want to cover 100 plus miles racing, plus a warm up, and have a good safety margin built in. I don't see such a battery saving even half of the weight of the normal battery.
The entire rear battery weighs 24 grams, can't find a weight for the front battery, but assume even 50 grams, a race day version of both batteries might save 20-30 grams or an ounce give or take.
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You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
08-26-15, 03:18 PM
#67
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HA! Found this out a couple weeks ago!
Di2 essentially accomplishes the same result. If you forget to recharge it, the FD, which takes more power, is disabled, but you retain the ability to shift on the rear, until the battery's gone. It will work I this mode for at least 40 miles (don't ask me how I know this.
)
)
08-26-15, 03:29 PM
#68
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I don't really see it worth the effort. The current batteries claim 600 mile range.
On the type of race where a tiny bit of weight savings might be of concern, i.e. long hilly road race, you'd want a fair amount of capacity. So you're "race day battery, you'd still want to cover 100 plus miles racing, plus a warm up, and have a good safety margin built in. I don't see such a battery saving even half of the weight of the normal battery.
The entire rear battery weighs 24 grams, can't find a weight for the front battery, but assume even 50 grams, a race day version of both batteries might save 20-30 grams or an ounce give or take.
On the type of race where a tiny bit of weight savings might be of concern, i.e. long hilly road race, you'd want a fair amount of capacity. So you're "race day battery, you'd still want to cover 100 plus miles racing, plus a warm up, and have a good safety margin built in. I don't see such a battery saving even half of the weight of the normal battery.
The entire rear battery weighs 24 grams, can't find a weight for the front battery, but assume even 50 grams, a race day version of both batteries might save 20-30 grams or an ounce give or take.
08-26-15, 03:37 PM
#69
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I'd like to know if and how FD auto-trim has been implemented with the eTap system. Or is SRAM still relying on their "yaw" technology to deal with that.
08-26-15, 04:06 PM
#70
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These's a number of reviews around. It looks like it'll be available in 2016. I might make the move to electronic/11 speed at then. I hope they release the Force version quickly because $3000. for components is a little high.
08-26-15, 04:32 PM
#72
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I'm happy to continue with my current crank and brakes. The crank is 10 speed, but I'm pretty sure it will work fine. I just need the derailleurs and levers. I use KMC chains anyway and could save a few bucks on a Force or Ultegra cassette.
08-26-15, 05:22 PM
#73
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Originally Posted by SRAM
SRAM RED ETAP Front Derailleur
SRAM YAW™ technology changed front shifting forever, eliminating the need for trim. The SRAM RED eTap Front Derailleur makes a good thing better by executing front shifts confidently and quickly over our proprietary wireless communication protocol. While the eTap shifter optimizes Yaw™ shifts as needed throughout the gear range with no need for rider input. At 187g including battery, the SRAM RED eTap front derailleur maintains SRAM’s best-in-class weight title.
SRAM YAW™ technology changed front shifting forever, eliminating the need for trim. The SRAM RED eTap Front Derailleur makes a good thing better by executing front shifts confidently and quickly over our proprietary wireless communication protocol. While the eTap shifter optimizes Yaw™ shifts as needed throughout the gear range with no need for rider input. At 187g including battery, the SRAM RED eTap front derailleur maintains SRAM’s best-in-class weight title.
08-26-15, 08:00 PM
#74
INSERT_TITLE_HERE
I come from a remote control airplane background. FHSS is seriously good ****. Big group flys happen where thousands of people are able to share the spectrum at once with this technology. Interference is simply not going to be an issue unless someone is running a pretty dedicated jammer on you.
Also, knowing what good high torque digital servos cost... holy **** this is expensive. Apparently when you spec a servo out for a bike like this you need it made of solid gold.
Also, knowing what good high torque digital servos cost... holy **** this is expensive. Apparently when you spec a servo out for a bike like this you need it made of solid gold.
08-26-15, 08:21 PM
#75
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I come from a remote control airplane background. FHSS is seriously good ****. Big group flys happen where thousands of people are able to share the spectrum at once with this technology. Interference is simply not going to be an issue unless someone is running a pretty dedicated jammer on you.
Also, knowing what good high torque digital servos cost... holy **** this is expensive. Apparently when you spec a servo out for a bike like this you need it made of solid gold.
Also, knowing what good high torque digital servos cost... holy **** this is expensive. Apparently when you spec a servo out for a bike like this you need it made of solid gold.