Speed Sensors?

[amacal1]

What are you guys using for speed sensors on your fancy, expensive road bikes?

I know some Trek frames have little pockets for putting one of their branded speed/cadence sensors in. I also know that most power meters are delivering cadence info. But, what are you using for a speed sensor?

Surely you're not just putting those $10 ant+ sensors on the front hub of a $5k carbon aero bike like I am for my $500 road bike, right? Is there some other technology or solution that I'm not aware of?

[raisinberry777]

I would expect that most are using none given the reliability of GPS speed these days.

[ejump0]

i use Xoss for speed sensor.
reliable speed data even when in city skyscraper area n tunnel

[amacal1]

I would expect that most are using none given the reliability of GPS speed these days.

I'm surprised by this. I can't stand the way GPS speed readings surge or lag. Maybe it's also where I ride, under a lot of tree cover occasionally. But between my phone and my gos bike computer I was very unhappy until I started using wheel speed sensors.

[toxin]

i mean, I don't really care to have the most accurate speed data, personally

[CountUgolino]

I have the Magene S314 hub mounted sensor on two of my 5k carbon bikes (neither is aero though).  I like having accurate speed info while under tree cover.

[Macedingle]

I used to use a speed sensor but DCrainmaker had a great article basically proving that GPS accuracy just as good as a sensor so I took it off my bike to save a few grams.

[SirBikealot]

i have the Magene S3 speed/cadence sensors on all of my wheelsets. Works really fine for around 10$/€ each.

[KaiDeus]

I used to use a speed sensor but DCrainmaker had a great article basically proving that GPS accuracy just as good as a sensor so I took it off my bike to save a few grams.

On my Bolt V2 with it's mediocore gps this isn't my experience. A speed sensor is vastly superior for me.