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Streamliner bicycles: a deep dive in the field of

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Enrico_Mauletti View Drop Down
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    Posted: 07 February 2025 at 8:13am
Greetings from Italy (Turin)!

This is my first post on the forum, so I hope I'm putting it in the right place…

It's about a study I've just finished on "streamliners" that I wanted to share with other recumbent bike fans. You can find the document here: 


I need to say a big thanks to Marco Ruga (ITA) and Russell Bridge (UK) for all their help with information and data.

Hope you find it an interesting read. Don't be afraid to leave comments - any feedback would be really helpful for improving and exploring the subject further.

Ciao!
Enrico


Edited by Enrico_Mauletti - 07 February 2025 at 9:01am
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Yanto View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Yanto Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2025 at 2:33pm
Hi Enrico, that is quite an in-depth study, I think it deserves a wider viewing than here on this forum, so I will share it on the BHPC Facebook page.

Ian
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Post Options Post Options   Thanks (0) Thanks(0)   Quote atlas_shrugged Quote  Post ReplyReply Direct Link To This Post Posted: 08 February 2025 at 9:08pm
Enrico

This is a great study. I hope this can be submitted for publishing in our Laidback Cyclist magazine if you would like.

So the real enemy is rolling resistance - especially on our UK roads!


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Enrico_Mauletti View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Enrico_Mauletti Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2025 at 8:59am

Originally posted by atlas_shrugged atlas_shrugged wrote:

Enrico 
This is a great study. I hope this can be submitted for publishing in our Laidback Cyclist magazine if you would like.
So the real enemy is rolling resistance - especially on our UK roads!

I wanted to share this paper to show how many tools are available these days to help you design a better bike, if you're interested. But first, it's worth trying to get a better handle on the science behind what affects how well a bike performs.

I'm perfectly happy for this to be published, and I appreciate you considering my study. Just a reminder that I'm not a total expert on all this!

Generally speaking, aerodynamics become more important the faster you're trying to go, especially for bikes without fairings – they can act like a bit of a parachute. Though, recumbent bikes usually beat any traditional bike in that regard.

Rolling resistance is often underestimated, but it's something you can improve with the right tyre choices. The quality of the roads (which aren't always great for cycling in Italy!) is another factor, although one we can't really change, but still need to think about.

Ultimately, though, gradient (hills!) is the real performance killer.

So, these three main forces – aero drag, rolling resistance, and gradient – can be more or less important depending on the type of cycling you're doing (racing or just for fun), the bike and the route (gradient, road surface, and so on).

Naturally, in racing, certain choices matter much more than they would in other cycling scenarios. Plus, we have to remember that streamliners are top-of-the-line racing machines, and they have some very specific features.

The main point of my study is to highlight that, given certain conditions, and understanding how these factors affect our cycling performance, there are choices we can make to improve how we ride or reduce the effort involved.

... but always remember that having fun is what really matters!



Edited by Enrico_Mauletti - 09 February 2025 at 9:21am
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Stix View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Stix Quote  Post ReplyReply Direct Link To This Post Posted: 21 February 2025 at 9:40pm
Interesting article - thanks for posting. Does anyone else on here work on bike aerodynamics? Ive been trying to understand it for a few years now - its not easy! 
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