My Future Bicycle

[James Aplin]

So i going to get a custom Bicycle built just a better one than that one can do 200MPH, but i thinking somewhere of 300MPH

i have worked out the gear ratio, which i have done 2 choices i go for the double gear reduction, or Triple gear reduction, also i going to build it for riding around the community

the frame i choose Chrome moly steel for the frame, the tyres Landspeed tyres, well if you look at some of the fat tyres some got on there bicycles there just as fat, also i worked out add a gear changes

 

 

[MiszS]

This has to be troll bro, how are you going to ride it anywhere without drafting behind a car with that gear ratio

[05032-Mendicant-Bias]

Drag increases with the square of velocity, doubling the speed requires quadrupling the muscle power.

 

The record is around 140 Km/h with seriouss engineering and training.

 

 

 

 

 

 

[ToboRobot]

4 hours ago, James Aplin said:

 

the frame i choose Chrome moly steel for the frame,

No dentists will respect you without carbon fibre.

[Needfuldoer]

Good luck with that.

 

One record holder pedaled a bicycle at 184 MPH, but she was towed up to that speed by a specially-designed drag car, then rode in the relatively calm air of the car's draft. Technically she was riding the bike at 184 MPH, but the car was doing the vast majority of the work (punching through the air).

 

 

10 hours ago, 05032-Mendicant-Bias said:

Drag increases with the square of velocity, doubling the speed requires quadrupling the muscle power.

 

The record is around 140 Km/h with seriouss engineering and training.

 

That's seriously underselling the engineering that went into that machine.

 

https://www.aerovelo.com/eta-speedbike

 

I'd love to see what their chassis could achieve if it was motorized.

 

Even adding the Craig Vetter Streamliner fairing made an impressive difference for a Zero motorcycle, and that was already more than 10 years ago.

 

https://craigvetter.com/pages/2013 Streamliner/2013-vetter-streamliner-Hershner-p66.html

https://craigvetter.com/pages/2015-Streamliner-pages/2015-Terry-goes-300miles-on-one-charge-p89.html

[MiszS]

8 hours ago, 05032-Mendicant-Bias said:

Drag increases with the square of velocity, doubling the speed requires quadrupling the muscle power.

 

The record is around 140 Km/h with seriouss engineering and training.

The power needed to fight air resistance actually increases to the power of 3, so 8 times more power required

[James Aplin]

23 hours ago, ToboRobot said:

No dentists will respect you without carbon fibre.

You mean this type of bike frame.

[James Aplin]

On 12/20/2025 at 7:48 PM, MiszS said:

This has to be troll bro, how are you going to ride it anywhere without drafting behind a car with that gear ratio

I wont worry about that, i think those kinds of bike brilliant, better riding that instead of going in a Tour De France that can never win, anyway there is no such

80T chainrings compatible with anything all i seen on Ebay alot of 1000 different things cannot find what i want, and no one is ever going to build a frame like that

anyway have you seen the price of Carbon fiber bikes i cannot afford that, its just a thought, so olympic veldrome what they ridding on the front 60T 12T. 4 to 1 pedal 180RPM to reach 60KMH so even that, so i know another way to get same and pedal a 3rd so double reduction so first reduction 60T 20T there is 3 To 1 now 2nd reduction 60T 12T 5 To 1 so instead of pedal 180 RPM now pedal 60 RPM to reach 60 RPM now dont pedal like a maniac

[Needfuldoer]

4 hours ago, James Aplin said:

I wont worry about that, i think those kinds of bike brilliant, better riding that instead of going in a Tour De France that can never win, anyway there is no such

80T chainrings compatible with anything all i seen on Ebay alot of 1000 different things cannot find what i want, and no one is ever going to build a frame like that

anyway have you seen the price of Carbon fiber bikes i cannot afford that, its just a thought, so olympic veldrome what they ridding on the front 60T 12T. 4 to 1 pedal 180RPM to reach 60KMH so even that, so i know another way to get same and pedal a 3rd so double reduction so first reduction 60T 20T there is 3 To 1 now 2nd reduction 60T 12T 5 To 1 so instead of pedal 180 RPM now pedal 60 RPM to reach 60 RPM now dont pedal like a maniac

That math only checks out in the world of physics textbooks, where the ground is an infinite flat plane and there's no friction or wind resistance.

 

Bicycles are marvelously efficient machines at converting human effort into motion, but there's only so much you can do with the roughly 200 watts of effort the average human can continuously put into a bicycle drivetrain.

 

There is no free lunch here; gearing always trades between speed and torque. More speed requires higher gearing. Higher gearing means slower pedaling. Slower pedaling means more pedaling effort is required. More speed means overcoming more wind resistance, which requires torque. Eventually you hit an equilibrium point where you can't pedal any harder so you can push through more air and go faster. (And that's assuming you don't run out of input power first.)

 

Get a regular 18 speed mountain bike, put it in its highest gear front and back, and try pedaling from a stop. Now try reaching and maintaining just 30 MPH. You won't, at least not for very long. That's only a small part of the energy required to propel a vehicle at the speeds you're imagining.

[James Aplin]

17 hours ago, Needfuldoer said:

That math only checks out in the world of physics textbooks, where the ground is an infinite flat plane and there's no friction or wind resistance.

 

Bicycles are marvelously efficient machines at converting human effort into motion, but there's only so much you can do with the roughly 200 watts of effort the average human can continuously put into a bicycle drivetrain.

 

There is no free lunch here; gearing always trades between speed and torque. More speed requires higher gearing. Higher gearing means slower pedaling. Slower pedaling means more pedaling effort is required. More speed means overcoming more wind resistance, which requires torque. Eventually you hit an equilibrium point where you can't pedal any harder so you can push through more air and go faster. (And that's assuming you don't run out of input power first.)

 

Get a regular 18 speed mountain bike, put it in its highest gear front and back, and try pedaling from a stop. Now try reaching and maintaining just 30 MPH. You won't, at least not for very long. That's only a small part of the energy required to propel a vehicle at the speeds you're imagining.

Yeah i not worried so rhis is what i was going to build just for myself, Well it reminds me of those BMX bike frames kids ride around on, but i wont to on better

be very hard to brake the speed limit theives will have a colossal trouble trying to get away on this, now i wish i had this bike bake in school days and when someone

say my dad has a Transam it beat your dads car then i say i got a BMX that can go 200 MPH and it doesnt drink petrol like you daddys car, they say there scared

of what that bicycle can do but by gee they can ride motocycles at 200MPH and get in high powered cars that dont scare them,ll hype, now i have to find a Frame builder can put a Build that frame

 

[Blue4130]

On 12/22/2025 at 4:02 PM, James Aplin said:

Yeah i not worried so rhis is what i was going to build just for myself, Well it reminds me of those BMX bike frames kids ride around on, but i wont to on better

be very hard to brake the speed limit theives will have a colossal trouble trying to get away on this, now i wish i had this bike bake in school days and when someone

say my dad has a Transam it beat your dads car then i say i got a BMX that can go 200 MPH and it doesnt drink petrol like you daddys car, they say there scared

of what that bicycle can do but by gee they can ride motocycles at 200MPH and get in high powered cars that dont scare them,ll hype, now i have to find a Frame builder can put a Build that frame

 

Are you drunk?