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Top Speed

Old 05-14-17, 01:16 PM
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tajar66
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Top Speed

I know a no meaning stat but what is your fastest top speed.
I have never hit the 40mph mark until yesterday 42.7mph registered on a Garmin.
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Old 05-14-17, 01:28 PM
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Strava logged my top speed at 55.9 MPH on a ride back in 2015 but I've always had my doubts about it's accuracy.
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Old 05-14-17, 01:29 PM
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Originally Posted by dksix View Post
Strava logged my top speed at 55.9 MPH on a ride back in 2015 but I've always had my doubts about it's accuracy.
Accurate or not that is fast.
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Old 05-14-17, 02:10 PM
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I cracked the 60mph mark dropping down to Monroe dam outside of Bloomington, IN:

https://www.strava.com/activities/14...S&v=1401653753
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Old 05-14-17, 02:11 PM
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Originally Posted by tajar66 View Post
Accurate or not that is fast.
It was a big increase from my normal top speed on a ride I do rather often. I regularly would log low 40's in that section but that day it was over 10 MPH than my next fastest speed and I'm not a fast rider. That was on my old aluminum bike which had a longer wheel base and more relaxed head tube angle. The Basso is short and steep, I rarely if ever break 40 MPH on it.
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Old 05-14-17, 02:31 PM
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39.2 mph, and it was scary for me to be going that fast. I'm happy puttering along at 15-20.
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Old 05-14-17, 02:33 PM
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Depends on whether the road is downhill or flat. Downhill, the fastest I have gone was 90 kph. On the flat, 70
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Old 05-14-17, 02:47 PM
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Originally Posted by chaadster View Post
I cracked the 60mph mark dropping down to Monroe dam outside of Bloomington, IN:

https://www.strava.com/activities/14...S&v=1401653753
That's an example where the max speed listed by Garmin or Strava is not accurate. It doesn't appear that you went faster than 76kph at any point. If you went 60mph you'd be able to zoom in on a section and see the speed increasing to a peak and then decreasing.
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Old 05-14-17, 02:53 PM
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How accurate is strava btw? You're saying strava was off by 24 kph. Others say it is very accurate.
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Old 05-14-17, 03:09 PM
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Originally Posted by gregf83 View Post
That's an example where the max speed listed by Garmin or Strava is not accurate. It doesn't appear that you went faster than 76kph at any point. If you went 60mph you'd be able to zoom in on a section and see the speed increasing to a peak and then decreasing.
I think I know what you're saying, but I'm pretty sure it's accurate because while the Strava file was recorded using GPS from my phone, my Garmin E500 with wheel speed sensor also recorded 59.8mph, so it was verified (more or less; it felt like 60.4mph!). I was away at training camp, and I didn't have a computer to upload from the Garmin, but I wanted the Strava report right away, which is why I was running both.
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Old 05-14-17, 03:12 PM
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Originally Posted by tajar66 View Post
I know a no meaning stat but what is your fastest top speed.
....
165, but that was in a car. On a bike, probably about 50 mph. Was on a looooong, steep downgrade, back when I was younger and less risk-concerned. I was riding my brakes at first, but though that it was better to not overheat them, and since I could see the end of the hill, I just rode it out. got a bit of shimmy, too, so I rode it by standing slightly on the pedals, and NOT gripping the frame with my knees. For about 5 seconds, I was afraid I was going to lose it, but the vibration dissipated. At the bottom of the hill, my face probably still white as a corpse, a guy who had been behind me (but slowly passed me) who had a speedometer of unknown accuracy said that he'd hit 55, and I can only assume that I was doing closer to 50-52.

FWIW, I never did that again.
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Old 05-14-17, 03:16 PM
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Originally Posted by speshelite View Post
How accurate is strava btw? You're saying strava was off by 24 kph. Others say it is very accurate.
It's not Strava which is accurate or inaccurate, but rather the data it recieves which is. If you're running and recording on a phone relying on GPS, it can be accurate or inaccurate depending on the integrity of the GPS connection. Things like heavy tree cover, tall buildings, and narrow canyons can create inaccuracies.

If you're uploading data from a cyclometer, whether you're using GPS or a wheel speed sensor matters, with wheel sensors being more reliable, but then you have to have the correct settings (i.e. wheel circumference) to have accurate reporting.
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Old 05-14-17, 03:21 PM
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55 mph heading down Snowbasin Mt one day on this. Typically get in the high 40s, low 50s according to wind conditions and such. This day was perfect but I got held up by traffic.

Oh and this speed was on my Giordana Antares. A 1989 steel framed beast sporting an old Dura Ace 6 speed groupset.

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Old 05-14-17, 03:23 PM
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Originally Posted by speshelite View Post
How accurate is strava btw? You're saying strava was off by 24 kph. Others say it is very accurate.
It depends on the precision of your device's GPS. Plus measuring average speed over longer distances gives more accurate measurement than measuring over short distances.
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Old 05-14-17, 03:28 PM
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I think mine is around 55 mph. (Bike computer + garmin GPS + garmin speed and cadence sensor. (Uses magnet on wheel) But then again we don't really have a lot of large steep hills to ride down around here. That and the gearing on my main bike tops out (comfortably) about 40 @ 120 RPM so it's hard for me to push it further than that. With that said, I have sustained 40 for a few miles downhill with a nice tailwind before. Great ride.
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Old 05-14-17, 03:28 PM
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Originally Posted by chaadster View Post
I think I know what you're saying, but I'm pretty sure it's accurate because while the Strava file was recorded using GPS from my phone, my Garmin E500 with wheel speed sensor also recorded 59.8mph, so it was verified (more or less; it felt like 60.4mph!). I was away at training camp, and I didn't have a computer to upload from the Garmin, but I wanted the Strava report right away, which is why I was running both.
Unfortunately, speed can't change instantaneously. If you were going 60mph you should see multiple seconds at a similar speed. If you don't then it's just a glitch in the GPS. I didn't see any samples even close to 60 so I'd chalk it up as a glitch.
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Old 05-14-17, 03:38 PM
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Mach 0.8 in an east bound 747-400 SFO to AMS or LHR Bike in a Carton as Checked Luggage...






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Old 05-14-17, 03:49 PM
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56, which was a bit scary because the road had some blind curves, and I was glad no cars were coming up.
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Old 05-14-17, 04:07 PM
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So strava is not accurate.
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Old 05-14-17, 04:24 PM
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Originally Posted by gregf83 View Post
Unfortunately, speed can't change instantaneously. If you were going 60mph you should see multiple seconds at a similar speed. If you don't then it's just a glitch in the GPS. I didn't see any samples even close to 60 so I'd chalk it up as a glitch.
I think your "glitch" analysis is not so good.

If you look at the speed data and elevation profile, you'll see speed increasing up until 2:36.04, then flatlining at 32mph for about 5 secs (until 2:36.09), despite elevation clearly indicating a steep decline.

Clearly the glitch was a dropout leading up to the top speed, which by the way was recorded consistently for 3 seconds as being near the 60mph peak.
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Old 05-14-17, 04:25 PM
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Originally Posted by speshelite View Post
So strava is not accurate.
Incorrect.
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Old 05-14-17, 05:29 PM
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My SA 5w has done my 5 all time best 44.63 to 45.79 mph, and also my 5 longest up to 126 miles. Hill is less than 1/3 mile and just around 10%. On a wired real speedometer. GPS ??? Pffft The few times I tried, Map-my-ride has been consistently off 8 miles on 80 mile courses, useless.
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Old 05-14-17, 05:47 PM
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Lacking fitness and having not been down any steep hills I seem to have topped out thus far at 28mph according to Strava.
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Old 05-14-17, 05:48 PM
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I think 45mph is my max, off the bike speedometer. It's a bit breezy, takes a good hill, and pedaling faster than normal (52x12, quick look says >130rpm). Sure feels good to do once in a while though.
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Old 05-14-17, 06:01 PM
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hit 42 down a scary fast hill ONCE....have not even been close again. To much for me, now 32-34 is the max I want to go.
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