The "ass saver" style one puts the battery right in the water spray. What could go wrong?
Might as well just hard wire the derailleur in to some solar cells, by which time you might as well just connect the shifter with a cable, which can work in the dark and doesn't need ridiculous charging gimmicks
Don’t think it’s applicable to most people. Tend to bike in the woods.
Commuter bikes on the other hand. I know axs and commuter don’t go together for most people but I’d imagine the market for that stuff is small regardless.
Don’t think it’s applicable to most people. Tend to bike in the woods.Commuter bikes on the other hand. I know axs and commuter don’t go together...
Don’t think it’s applicable to most people. Tend to bike in the woods.
Commuter bikes on the other hand. I know axs and commuter don’t go together for most people but I’d imagine the market for that stuff is small regardless.
The majority of commuter bikes are ebikes now, and only more sales will happen in the future.
So SRAM need to bloody plug the derailleur etc into the big ass battery already so you've only got one thing to charge.
I don’t know much about solar. But pretty sure it needs a lot of surface area and a lot of sunlight.
high efficiency ambient light photovoltaics are being developed with some level of reasonable promise. I suspect SRAM is jumping on the patent train nice and early on this one so once the solar tech is public they'll be set.
high efficiency ambient light photovoltaics are being developed with some level of reasonable promise. I suspect SRAM is jumping on the patent train nice and early...
high efficiency ambient light photovoltaics are being developed with some level of reasonable promise. I suspect SRAM is jumping on the patent train nice and early on this one so once the solar tech is public they'll be set.
Also protects them from having some whack company put out a crappy version. Some patents are just to block idiots
Funnily enough, I think you should have stopped way back there somewhere too! But here we are...
Anyhoo, snark aside and back to jsray's post. I can easily see a solar trickle feed being enough to run things like flight attendant or a wireless dropper. Maybe not the derailleur.... I mean the whole point of AXS was to stop having cables running thru the frame, so a cable to the electric derailleur would be kinda an odd choice yeah?
I am kind of surprised that there haven’t been any devices that use regeneration to charge axs batteries. Can anyone calculate how many watts it would take to charge a battery that small? I feel like you could just run a copper coil in the jockey wheel or cassette and get all of that back on a descent or at least enough to only have to charge your batteries every month or more.
I am kind of surprised that there haven’t been any devices that use regeneration to charge axs batteries. Can anyone calculate how many watts it would...
I am kind of surprised that there haven’t been any devices that use regeneration to charge axs batteries. Can anyone calculate how many watts it would take to charge a battery that small? I feel like you could just run a copper coil in the jockey wheel or cassette and get all of that back on a descent or at least enough to only have to charge your batteries every month or more.
It will come, but not now, as they are still milking the cow of the marginal gains, and loosing watts is a bad look. A tiny dinamo makes sense in some aplications, but it probably makes more sense in shimano's "ecosistem"
I am kind of surprised that there haven’t been any devices that use regeneration to charge axs batteries. Can anyone calculate how many watts it would...
I am kind of surprised that there haven’t been any devices that use regeneration to charge axs batteries. Can anyone calculate how many watts it would take to charge a battery that small? I feel like you could just run a copper coil in the jockey wheel or cassette and get all of that back on a descent or at least enough to only have to charge your batteries every month or more.
Not sure why you're getting downvoted... you can probably jury rig a dynamo/USB bank combo to charge your AXS batteries on the road, and I bet bikepackers are doing just that, but a SRAM native, plug and play, sleek and integrated, trail rider friendly option seems like a no brainer.... but it'd have wires, which is off brand. I think that and the limited market for range anxiety paranoid type folks is your biggest obstacle to go to market. Everyone else can just carry an extra battery. Jockey wheel charging is far fetched... you don't need a ton of watts but you need more copper/EM flux to actually generate electricity.
Charging the small clip-on AXS battery on the fly would be a little difficult while in use. This is why SRAM is proposing to mount the batteries on the small solar panels. They really don't want to deal with wires given the whole appeal of AXS is "wireless"
I've looked into making a longer battery AXS solution for a long distance XCM racer. I can use a cheap Amazon AXS battery and solder a wire to it. This would allow the rider to run a much larger battery inside their bike frame instead of the 2.2Wh battery. Similar to how Di2 is wired. This in-frame battery can then be wired to a dynamo/usb bank for constant top-up. Ideally it would be nice SRAM starts selling the wiring harness they use for their AXS equipped e-bikes but the use case is very niche and really only useful for 24hr+ racers, bike packers and ultra marathoners like tour divide.
It seems to me that the seat post would be the best place to generate electricity. Use the riders weight to generate power on the drop. It could charge the seat post battery as you use it. Then if you run out of shift battery, just switch the two.
Not sure why you're getting downvoted... you can probably jury rig a dynamo/USB bank combo to charge your AXS batteries on the road, and I bet...
Not sure why you're getting downvoted... you can probably jury rig a dynamo/USB bank combo to charge your AXS batteries on the road, and I bet bikepackers are doing just that, but a SRAM native, plug and play, sleek and integrated, trail rider friendly option seems like a no brainer.... but it'd have wires, which is off brand. I think that and the limited market for range anxiety paranoid type folks is your biggest obstacle to go to market. Everyone else can just carry an extra battery. Jockey wheel charging is far fetched... you don't need a ton of watts but you need more copper/EM flux to actually generate electricity.
Or stick to cables.
The downvotes on perfectly normal posts started back a few months ago when some idiot made some idiotic comments and got destroyed. He's been down voting everything he reads since then.
Ok here’s another crazy one, what if your Tuned Mass Damper also had a regeneration component, I think in theory this would also allow you to change the natural frequency on the fly, no?
Ok here’s another crazy one, what if your Tuned Mass Damper also had a regeneration component, I think in theory this would also allow you to...
Ok here’s another crazy one, what if your Tuned Mass Damper also had a regeneration component, I think in theory this would also allow you to change the natural frequency on the fly, no?
I don't want to REALLY derail this thread...but about 15 years ago I worked as an engineering consultant and ultimately spun off a small company to develop vibration based energy harvesters that were essentially tuned mass dampers. The damping was electromechanical, and tuned both with hardware and software. Our secret sauce and patent material was a mechanical means to decouple the frequency of the harvester from the input source...it could be very efficient with a wide range of input excitation frequencies. They never made much power, though...you could take a measurement or send a low power signal, but charging a battery was never the application. Supercap, yes, not a battery. We never made any money.
Sram AXS mudguard/bottle cage charger, looks interesting.
https://patents.google.com/patent/US20240113551A1/en?oq=US20240113551A1
The "ass saver" style one puts the battery right in the water spray. What could go wrong?
Might as well just hard wire the derailleur in to some solar cells, by which time you might as well just connect the shifter with a cable, which can work in the dark and doesn't need ridiculous charging gimmicks
Not appicable here in Wales.
New drh evo's?
Don’t think it’s applicable to most people. Tend to bike in the woods.
Commuter bikes on the other hand. I know axs and commuter don’t go together for most people but I’d imagine the market for that stuff is small regardless.
A solution to a problem, for a solution to a problem, no one ever had. Excellent.
The majority of commuter bikes are ebikes now, and only more sales will happen in the future.
So SRAM need to bloody plug the derailleur etc into the big ass battery already so you've only got one thing to charge.
Look in the pitbits articles.
I don’t know much about solar. But pretty sure it needs a lot of surface area and a lot of sunlight.
More interested in the YT brake mount being wider than standard. 6 piston or for stiffer brake mounts?
Appreciate your thoughtful, helpful, and insightful commentary.
Notice the standard pm adapter bolted to it. The big one is probably reversible to reposition the brake along with the chainstay length flip chip.
high efficiency ambient light photovoltaics are being developed with some level of reasonable promise. I suspect SRAM is jumping on the patent train nice and early on this one so once the solar tech is public they'll be set.
Also protects them from having some whack company put out a crappy version. Some patents are just to block idiots
should have stopped after much
Finallly, a wireless water bottle cage. The industry is finally listening.
Funnily enough, I think you should have stopped way back there somewhere too!
But here we are...
Anyhoo, snark aside and back to jsray's post.
I can easily see a solar trickle feed being enough to run things like flight attendant or a wireless dropper.
Maybe not the derailleur.... I mean the whole point of AXS was to stop having cables running thru the frame, so a cable to the electric derailleur would be kinda an odd choice yeah?
I am kind of surprised that there haven’t been any devices that use regeneration to charge axs batteries. Can anyone calculate how many watts it would take to charge a battery that small? I feel like you could just run a copper coil in the jockey wheel or cassette and get all of that back on a descent or at least enough to only have to charge your batteries every month or more.
It will come, but not now, as they are still milking the cow of the marginal gains, and loosing watts is a bad look. A tiny dinamo makes sense in some aplications, but it probably makes more sense in shimano's "ecosistem"
Not sure why you're getting downvoted... you can probably jury rig a dynamo/USB bank combo to charge your AXS batteries on the road, and I bet bikepackers are doing just that, but a SRAM native, plug and play, sleek and integrated, trail rider friendly option seems like a no brainer.... but it'd have wires, which is off brand. I think that and the limited market for range anxiety paranoid type folks is your biggest obstacle to go to market. Everyone else can just carry an extra battery. Jockey wheel charging is far fetched... you don't need a ton of watts but you need more copper/EM flux to actually generate electricity.
Or stick to cables.
Foes big rig is looking pretty dialed. Calling it the FXR.
Charging the small clip-on AXS battery on the fly would be a little difficult while in use. This is why SRAM is proposing to mount the batteries on the small solar panels. They really don't want to deal with wires given the whole appeal of AXS is "wireless"
I've looked into making a longer battery AXS solution for a long distance XCM racer. I can use a cheap Amazon AXS battery and solder a wire to it. This would allow the rider to run a much larger battery inside their bike frame instead of the 2.2Wh battery. Similar to how Di2 is wired. This in-frame battery can then be wired to a dynamo/usb bank for constant top-up. Ideally it would be nice SRAM starts selling the wiring harness they use for their AXS equipped e-bikes but the use case is very niche and really only useful for 24hr+ racers, bike packers and ultra marathoners like tour divide.
It seems to me that the seat post would be the best place to generate electricity. Use the riders weight to generate power on the drop. It could charge the seat post battery as you use it. Then if you run out of shift battery, just switch the two.
The downvotes on perfectly normal posts started back a few months ago when some idiot made some idiotic comments and got destroyed. He's been down voting everything he reads since then.
Ok here’s another crazy one, what if your Tuned Mass Damper also had a regeneration component, I think in theory this would also allow you to change the natural frequency on the fly, no?
I don't want to REALLY derail this thread...but about 15 years ago I worked as an engineering consultant and ultimately spun off a small company to develop vibration based energy harvesters that were essentially tuned mass dampers. The damping was electromechanical, and tuned both with hardware and software. Our secret sauce and patent material was a mechanical means to decouple the frequency of the harvester from the input source...it could be very efficient with a wide range of input excitation frequencies. They never made much power, though...you could take a measurement or send a low power signal, but charging a battery was never the application. Supercap, yes, not a battery. We never made any money.
Sorry, back to bikes.
New Hightower.
Gotta be a new Hightower.