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[-] Heresy_generator@kbin.social 75 points 1 year ago

20-mile-per-hour speed limit permitted for riders under 16

So, unmodified, slower than a bicycle where your average cyclist can sprint to over 30 mph without much trouble.

This is just media fear mongering about [new thing]. When I was a kid there were plenty of bicycle wrecks where kids got hurt, sometimes severely, and the media wasn't pearl-clutching about the "danger" of pedal bikes.

[-] Hunter2@discuss.tchncs.de 28 points 1 year ago* (last edited 1 year ago)

your average cyclist can sprint to over 30 mph without much trouble.

I don't believe that. That's 50kph!! Your average cyclist will be pedaling 12 to 15 mph (20 to 25 kph) and at that point you'll be sweating, it's not "leisure" speed. That would be up to 9mph/15kph.

You are not reaching 30mph unless you are fully sprinting on a descent with a gravel bike (maybe a mountain bike if it's a long, long, stretch) or have a road bicycle on a flat/slight slope and you are full sending it (even on a flat road I'm assuming, I've never ridden one). Not to mention these people will be using protective gear.

I have a gravel bicycle and on a flat road I can get up to 23mph (37 kph) with me going full beans (occasionally fighting the wind). For reference, I've only reached 30mph a couple times in 1,100km and it's been only on a 3km long downward stretch of road. Also because there's no point to waste that energy when you are transversing double digits distances, and it gets really scary to be at those speeds anyways.

You certainly cannot get those speeds on a city bike or mountain bike on flat asphalt since they are not as aerodynamic, and often more heavier.

[-] OrgunDonor@kbin.social 11 points 1 year ago

I do agree with most of your post, and the whole your average cyclist doing "30 mph without much trouble" is ridiculous. I do think you are underestimating how fast road bikes can be though.

You are not reaching 30mph unless you are fully sprinting on a descent with a gravel bike (maybe a mountain bike if it’s a long, long, stretch) or have a road bicycle on a flat/slight slope and you are full sending it (even on a flat road I’m assuming, I’ve never ridden one). Not to mention these people will be using protective gear

So, on a road bike, it is pretty easy on the flat to keep 20mph/32kmh. 30mph/48kmh is definitely an effort and not one that is sustainable for most people. To give you an idea, I did a charity bike ride in June which was just shy of 100 miles, it was 158.3km with 1667m of climbing as well, so not completely flat. I averaged 31.2kmh. I am in no way fast, I am alright on the flat but gravity is a cruel mistress on an uphill.

Downhill is a different thing as well, I have hit speeds of around 62mph/100kmh, and a hill near me will almost always spit me out doing 55mph/89kmh with 0 effort(roll down the hill and sit on the drops), and that is on both my road and gravel bikes. But that is probably steeper than you are thinking. However, there is also a pretty steady -1% average "downhill", it is a false flat, but it is really easy to cruise along at 25mph/40kph+.

[-] Hunter2@discuss.tchncs.de 2 points 1 year ago

Yeah, I don't doubt it, I was just trying to be (overly) conservative to show how pedaling up to and keeping 50kph is far from being reachable by the average cyclist.

Not only because of the bike, but you also need a well maintained strech of asphalt to reach and maintain that speed.

In my head I thought I can easily get to 60kph with the sprint output I do with my gravel bike if I had a carbon road bike, but I didn't want to say something silly. Especially because I'd still be dealig with the same terrible infrastructure and wind around here.

The other point was that once you get in the 40kphs it starts to get scary, but that's down to where you are and the conditions. So it's not like the average bro with flipflops and front basket does it on the daily.

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this post was submitted on 29 Aug 2023
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