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Yeah this is common, often these rings have a little diagram engraved in them. When placed incorrectly the risk of chain drops is allegedly higher by some unknowable amount. Depending on the design, the chain may not really fit well the other way, so yours may always be correct. The praxis...

only if the app is stupid. iPhone location services use a combination of barometric pressure and GPS, which is selectable by the app, as with this cycling app :

nice little native clik mini pump https://www.wolftoothcomponents.com/collections/pumps/products/encase-pump-for-schwalbe-clik-valve

facts

definitely targeted at MTBs, not sure i’ve ever seen a road bike with 4 piston brakes but i imagine it’s possible. probably easier than inventing a new motor and adapting a rear hub motor to a carbon frame with a regular through axle. ;) anyway, i agree wholeheartedly that continuing innovation...

of course it could be smaller, but unless your friend is proposing starting a motor company to design and have manufactured a motor (which would surely cost hundreds of thousands of dollars for the first unit) it really is irrelevant what he thinks. if it was so easy, such a product would exist...

Thinking about the rear hub motor a bit more, i wonder how much the design of a frame for disk brakes takes into account similar forces, applied rather suddenly? The seat stays on a lot of super light modern carbon road bikes are seriously thin, which make sense if they go into tension in...

We have three bikes with presta - my aethos, addict e-ride, and daughter’s sirrus. The first two tubeless, the latter tubed. Have a front hub commuter with schrader, and my younger daughter has a little cleary with schrader also. And an electric scooter with schrader. however, 95% of my tire...

that’s all very interesting, i hadn’t observed that correlation before. i’m not really a spinner and tend to bounce a bit in the saddle at those higher speeds, but it goes away out of the saddle, under heavy load, or at my more comfortable cadences. i did a ride yesterday that accidentally was...

that’s interesting, are you talking about resonance in the bike frame itself … or bouncing/oscillation of the rider on the seat which transfers into the frame? the latter is usually from the seat being not quite at the right height, or the bike is helping you out too much and there isn’t isn’t...

a good phone mount will have some small amount of damping (typically in the design of the arm or, for direct mount, rubber interface) which probably helps with the most damaging high frequency vibrations, compared to something much beefier and rigid attached to the also much beefier and rigid...

silca ”Terra.” I like the wood handle, and the guage is rock solid, super smooth. When you stop pumping it snaps to the pressure super fast and stays right there. the only other floor pump I’ve had was a cheapie (that lasted 13 years), no comparison. the head snaps on really straight and...

I got a new pump recently, and while it’s way nicer than my old one, the lever to lock the head on is so hard to fold down I worry I’m going to break the tubeless valve off! it locks on very securely even without the lever, and has me wondering about clik again 😄

also.… the addict e-ride is a very nice bike, maybe pick up a used one? it’s essentially the bike you are trying to build yourself. notice that 1) you can’t even see the motor and 2) the chain stays are substantially reinforced relative to the regular addict. the additional dimension also...

they’re serving a very different market, with nothing even remotely as light as the X20 that @Katrina92 is trying to improve on. The X20 weighs 1.39kg. a typical hub might weigh 200g, so the delta is more like 1200g. I am not aware of anything else that light, and while it’s bigger than a...

electricity, on the other hand, is already up to 40% renewable, 35-40% depending on the source. solar has been doubling every few years. electrification is occurring almost everywhere, and while yes, it’ll take a while, yes, it’s also inevitable. current growth rates suggest 50% carbon-free...

this is a very strange result - among the billions of words spent by cyclists debating wax and lube i have never heard of using both - it's widely acknowledged that wax and lube don't mix. they literally don't mix. the idea here that the wax would stay on the outside of the lube and keep the...

same, many quality lithium ion batteries go way more cycles than promised.

sounds like your LBS and specialized will have it sorted! the input that the motor is most efficient at higher cadence is absolutely true - but it should reliable and smoothly deliver power all the way down to the lowest cadence you can keep rolling at. efficiency does drop as your cadence gets...

your post seems a little contradictory - do you want exercise while commuting, or do you just want a fast easy commute on a bike?