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How to increase bicycle top speed.

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How to increase bicycle top speed.

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Old 06-23-18, 07:08 PM
  #51  
Shimagnolo
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Originally Posted by phughes View Post
This is how you increase speed.

A bit of refinement on that method:
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Old 06-23-18, 08:04 PM
  #52  
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Originally Posted by FRIEND OF GOD View Post
The article at the top of the page is perhaps more for persons less familiar with bicycles than yourself
It's good that you're trying to figure this stuff out, but to be honest you're not there yet. I remember in HS, some kid in history class asked my track coach about running. He said, "if you want to run faster, take longer steps and take them faster." He was being a smart-alec, because A, it's obvious and B, it's completely unhelpful. If you want to run faster, you have to train. More strength, better endurance, better technique, and then when you're faster you WILL be taking longer longer steps and/or taking them faster.

You're saying the exact same thing, only with bikes. "Longer steps" is equivalent to higher gearing. "Taking them faster" is equivalent to cadence. Same problem: a, it's obvious and b, it's unhelpful. You cannot push a higher gear at a faster cadence unless you've trained for more strength and endurance. Any road bike, mountain bike, hybrid bike etc that you buy at the bike shop already has gearing that is higher than you can probably push at a typical 85-95 cadence. Therefore changing the gearing won't make you faster. Trying to speed up your cadence won't make you faster. Your limiter is power, not gears or cadence.
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Old 06-23-18, 09:03 PM
  #53  
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This is bizarre.
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Old 06-23-18, 10:09 PM
  #54  
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Originally Posted by noglider View Post
This is bizarre.
man, it’s not even up to par with the bicycle drag racing guy.
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Old 06-23-18, 10:19 PM
  #55  
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Originally Posted by Kontact View Post
No one uses 58t chainrings.
One of my bikes has a 60t chain ring so I'd expect some people to use 58t ones as well (they're certainly available). Mine is on my folder with 20" tires so it's about equivalent to a 45t chain ring on a bike with 700c tires.

The OP's misconception that the way to make bikes faster is to increase their gearing is one that I've seen pop up on these forums periodically. I suspect that it's from people who are fairly new to biking and are accustomed to a low cadence. So they feel that the highest gear on their bike doesn't let them go very fast at a comfortable cadence. Usually with more experience they discover that a faster cadence actually becomes more comfortable and less fatiguing.
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Old 06-24-18, 02:41 AM
  #56  
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Oof,

What an ungodly mess.

And in the commuting subforum

I like the slow cadences and big gears perhaps more than the average BF member. But with it comes realistic expectations.

Top speed? For how long? On the level or descents? 300 lb rider smoking the 100 lb riders? Keep in mind that most 300 lb cyclists aren't all lean muscle. However, I do agree that larger riders may naturally choose lower cadences than lighter riders. Hills?

Just pushing down, or also pulling up?

Anyway , build your 11T 29er bike, push it up to 45 MPH (or a more realistic 30 MPH), and report back.

One thing you are missing is a quality lightweight bike with reasonably narrow high quality 700c tires, rigid frame , and aero body positioning.

To hit those higher speeds, and you'll need all the help that you can get.

Tight rear gearing is nice for those moments that 11T doesn't cut it, and you wish to try 12T, 13T, or 14

Note, if your bike takes a freewheel instead of a cassette, then look at the DNP Epoch freewheels
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Old 06-24-18, 11:09 AM
  #57  
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Originally Posted by Shimagnolo View Post
A bit of refinement on that method: https://www.youtube.com/watch?v=bKHz7wOjb9w
I have seen that before. I'd love to ride that.
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Old 06-27-18, 11:13 AM
  #58  
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Hmm, a misleading sign to get people in the door? Where else have I seen that?

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Originally Posted by chandltp View Post
There's no such thing as too far.. just lack of time
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Old 06-30-18, 08:51 PM
  #59  
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Journalist: "Is it better to spin a low gear or to mash a big gear?"
Eddy: "It's better to spin a big gear."
Or so they say...
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Old 07-01-18, 12:16 PM
  #60  
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I like Colin Furze Pulse Jet Engine approach ,
but the frame design needs a bit of work,
and it is full throttle, till the flame goes out from lack of fuel..

the application in the V 1 buzz-bomb was at the top of its altitude, by then ..
and then fell quietly .. until it hit.






...
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Old 07-01-18, 12:29 PM
  #61  
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Originally Posted by fietsbob View Post
Maybe a Moses will part the atmosphere eliminating air resistance...
​​​​​​
Along with your ability to breathe and hold yourself together, slightly negative side effects
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Old 07-02-18, 11:11 AM
  #62  
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Originally Posted by fietsbob View Post
I like Colin Furze Pulse Jet Engine approach ,
but the frame design needs a bit of work,
and it is full throttle, till the flame goes out from lack of fuel..

the application in the V 1 buzz-bomb was at the top of its altitude, by then ..
and then fell quietly .. until it hit.






...
Yeah, the frame design leaves a lot to be desired. At the speed it was running, which wasn't all that fast, it was incredibly unstable. I believe he simply slapped together some old parts to the frame as well, magnifying the issue.
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Old 07-02-18, 12:00 PM
  #63  
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Then he went on to do something else ..

the pulse jet power.. was also applied to a 4 wheel Go Cart..
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Old 07-02-18, 04:58 PM
  #64  
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Originally Posted by Bandera View Post
God said to Abraham "Kill me a son."
Abe said "Man, you must be puttin' me on."
God said "No."
Abe said "What?"
God said "You can do what you want Abe, but the next time you see me comin' you better Run."
Abe said "Where you want this killin' done?"
God said "Out on Hwy 61."

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i love that tune!
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