{"id":42339,"date":"2022-10-03T14:36:10","date_gmt":"2022-10-03T12:36:10","guid":{"rendered":"https:\/\/www.bikeradar.com\/?p=699036"},"modified":"2022-10-03T14:51:16","modified_gmt":"2022-10-03T12:51:16","slug":"pinarello-unveils-filippo-gannas-3d-printed-humpback-whale-inspired-hour-record-bike","status":"publish","type":"rss_feed","link":"https:\/\/c01.purpledshub.com\/cyclingplus\/rss_feed\/pinarello-unveils-filippo-gannas-3d-printed-humpback-whale-inspired-hour-record-bike\/","title":{"rendered":"Pinarello unveils Filippo Ganna\u2019s 3D-printed, humpback whale inspired Hour Record bike"},"content":{"rendered":"

<\/p>

By Simon von Bromley\n \t\t<\/p>

Published: Monday, 03 October 2022 at 12:00 am<\/p>

\n\n

Pinarello has officially unveiled the Bolide F HR 3D, the bike which Filippo Ganna will use for his upcoming attempt at the UCI Hour Record.<\/p>\n

In a move Pinarello claims is a \u201cworld-first\u201d, the Bolide F HR 3D uses a 3D-printed<\/a> construction across much of the bike.<\/p>\n

Pinarello says this enabled it \u201cto introduce new shapes and features that are impossible to replicate\u201d using existing carbon fibre construction techniques.<\/p>\n

These features include custom geometry and sizing, and novel humpback whale-inspired aerodynamic shapes, as well as less obvious benefits such as internal reinforcement and reduced development time.<\/p>\n

The world\u2019s first 3D-printed UCI-compliant aero bike<\/h2>\n
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The Pinarello Bolide F HR 3D is 3D-printed from Scalmalloy and titanium, then bonded together using aerospace-grade epoxy.<\/span><\/figcaption> Pinarello<\/i><\/span><\/div>\n

The Pinarello Bolide F HR 3D is made in partnership with UK-based 3D-printing specialists Metron Advanced Equipment.<\/p>\n

As with the Metron\u2019s recently launched Mythos Elix 3D printed stem<\/a>, the Pinarello Bolide F HR 3D frameset and seatpost are built from Scalmalloy.<\/p>\n

This alloy of scandium, aluminium and magnesium is, according to Pinarello, \u201can aerospace material specifically designed for 3D-printing\u201d.<\/p>\n

The frame was produced in five separate parts, and then bonded together using epoxy resin.<\/p>\n

\"""\"<\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/picture><\/div>
The Pinarello Bolide F HR 3D is, according to Pinarello, the world\u2019s first 3D printed UCI-compliant aero bike.<\/span><\/figcaption><\/div>\n

The bike is built around 3D-printed titanium narrow bullhorn-style handlebars and the same kinked aero extensions as seen on Ganna\u2019s Bolide F time trial bike<\/a>.<\/p>\n

The \u201cfork head\u201d is also constructed using 3D-printed titanium. It is unclear if the fork head refers to the fork crown or the steerer.<\/p>\n

A copy of Ganna\u2019s frameset was sent to EFBE, a leading mechanical bicycle test lab in Germany, for independent testing to ISO4210 standards<\/a> (ISO4210 covers safety standards for bicycles, and includes a range of fatigue, impact and torsion tests).<\/p>\n

\"""\"<\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/picture><\/div>
The Pinarello Bolide F HR 3D has been subject to ISO4210 safety tests.<\/span><\/figcaption><\/div>\n

According to Pinarello, the Bolide F HR 3D is the first 3D-printed, UCI-compliant aerodynamic bike to pass these tests.<\/p>\n

In accordance with UCI rules, the Pinarello Bolide F HR 3D will be available to consumers via official retailers, although due to the custom, 3D-printed construction, it will only be built on demand and no pricing is given.<\/p>\n

Given the aforementioned Mythos Elix stem costs \u00a3500, however, it\u2019s probably fair to assume the Pinarello Bolide F HR 3D won\u2019t be cheap.<\/p>\n

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The Pinarello Bolide F HR 3D\u2019s handlebars are made from 3D printed titanium for added strength.<\/span><\/figcaption><\/div>\n

What can humpback whales teach us about aerodynamics?<\/h2>\n

The most visually striking aspect of the Bolide F HR 3D is arguably the bumpy seat tube and seatpost.<\/p>\n

According to Pinarello, this feature is designed to mimic the tubercles seen on the fins of humpback whales.<\/p>\n

Pinarello cites research by the University of Adelaide, which applied this concept to a bicycle frame in a patent application filed in 2016. Zipp also uses a similar idea for its Sawtooth rim profile<\/a>.<\/p>\n

\"""\"<\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/picture><\/div>
The bumpy seat tube and seatpost are inspired by the tubercles on humpback whale fins.<\/span><\/figcaption><\/div>\n

Pinarello says the seat tube and seatpost account for 39 per cent of the overall drag on a bicycle, and that it\u2019s an especially hard area to manage airflow in, due to the turbulence generated by the rider\u2019s moving legs.<\/p>\n

Adding ridges to the leading edge of these structures can, when sized correctly, \u201cminimise this separation effect and reduce the drag\u201d, according to Pinarello.<\/p>\n

This drag reduction is achieved by \u201cgenerating streamwise vortices in the troughs between the bumps, causing the flow behind the peaks to stay attached\u201d.<\/p>\n

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Pinarello tested a number of different bumpy seat tube and seatpost designs, and say finding the right sized bumps is crucial to improving performance.<\/span><\/figcaption><\/div>\n

Goodbye 3:1 rule<\/h2>\n

Beyond the bumpy tubes, Pinarello says it has also found aerodynamic gains in more traditional ways, via elongating the tube profiles beyond the constraints of the UCI\u2019s recently removed 3:1 rule (which dictated frame tubes and forks could be no more than three times longer than their width).<\/p>\n

Pinarello has not given exact ratios for the individual tubes on the Bolide F HR 3D but says \u201cit is very well known that airfoil sections that have an aspect ratio of 6:1 or even 8:1 do perform significantly better than the old 3:1 ratio.\u201d<\/p>\n

\"""\"<\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/picture><\/div>
The Bolide F HR 3D gets elongated tube shapes and a narrower form to reduce drag.<\/span><\/figcaption><\/div>\n

The wheel hubs and bottom bracket have also been narrowed significantly, for further aerodynamic gains compared to the Bolide HR used by Bradley Wiggins for his Hour Record in 2015.<\/p>\n

The front and rear hubs are 69mm and 89mm wide, respectively, down from 100mm and 120mm.<\/p>\n

The bottom bracket, meanwhile, is now just 54mm wide, down from 70mm.<\/p>\n

Pinarello says no, grazie, to wide forks<\/h2>\n

Notably, Pinarello has decided to stick with a more traditional, narrow fork and seat stays design.<\/p>\n

It notes that wide stance designs, such as that seen on the Hope HB.T<\/a>, can improve performance if it reduces the overall system drag (rider plus bike) by enough to outweigh the penalty incurred by the design.<\/p>\n

\"""\"<\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/picture><\/div>
Pinarello says the Bolide F HR 3D is a result of extensive CFD, wind tunnel and real world testing.<\/span><\/figcaption><\/div>\n

Pinarello said its testing showed the results of such designs were \u201ctoo unstable\u201d, however, and that the \u201cpotential gains were not consistent enough to adopt such a design.\u201d<\/p>\n

Interestingly, however, this concept is adopted in Ganna\u2019s previously mentioned 3D-printed aero extensions.<\/p>\n

Pinarello notes that the kinked design increases drag in isolation, but leads to a net reduction in aerodynamic drag with a rider present.<\/p>\n

\"""\"<\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/source><\/picture><\/div>
The aero extensions have kinked risers which are claimed to help reduce drag with a rider on the bike.<\/span><\/figcaption><\/div>\n

All of these design features have, Pinarello says, been validated by CFD, wind tunnel and real-world testing.<\/p>\n

As we now know, the final test for the Bolide F HR 3D was Dan Bigham\u2019s successful Hour Record<\/a> attempt earlier this year, in which he rode an unbranded prototype version of the bike.<\/p>\n

Following Bigham\u2019s led, Ganna looks set to use custom Princeton CarbonWorks disc wheels, shod with tubeless Continental GP5000 TT tyres<\/a>, a WattShop Cratus Aero Crank and carbon fibre track chainring, and a Muc-Off optimised track chain.<\/p>\n

Filippo Ganna\u2019s Pinarello Bolide F HR 3D specifications<\/h2>\n
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Filippo Ganna\u2019s Pinarello Bolide F HR 3D<\/span><\/figcaption><\/div>\n
\n
  • Frameset:<\/strong> Pinarello Bolide F HR 3D, 3D-printed Scalmalloy<\/li>\n
  • Handlebars:<\/strong> Pinarello, 3D printed titanium<\/li>\n
  • Wheels:<\/strong> Princeton CarbonWorks Track Special<\/li>\n
  • Tyres:<\/strong> Continental GP5000 TT<\/li>\n
  • Crankset:<\/strong> WattShop Cratus Aero Crank with WattShop Cratus carbon fibre chainring<\/li>\n
  • Chain:<\/strong> Muc-Off optimised Izumi Kai 1\u20442\u201d track chain<\/li>\n
  • Saddle:<\/strong> Fizik Ares TT<\/li>\n<\/ul><\/body><\/html>\n
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    By Simon von Bromley Published: Monday, 03 October 2022 at 12:00 am Pinarello has officially unveiled the Bolide F HR 3D, the bike which Filippo Ganna will use for his upcoming attempt at the UCI Hour Record. In a move Pinarello claims is a \u201cworld-first\u201d, the Bolide F HR 3D uses a 3D-printed construction across […]<\/p>\n","protected":false},"author":24,"featured_media":42340,"template":"","categories":[1,36],"acf":{"readingTimeMinutes":"6"},"uagb_featured_image_src":{"full":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/10\/pinarello-unveils-filippo-gannas-3d-printed-humpback-whale-inspired-hour-record-bike-scaled.jpg",2560,1707,false],"thumbnail":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/10\/pinarello-unveils-filippo-gannas-3d-printed-humpback-whale-inspired-hour-record-bike-150x150.jpg",150,150,true],"medium":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/10\/pinarello-unveils-filippo-gannas-3d-printed-humpback-whale-inspired-hour-record-bike-300x200.jpg",300,200,true],"medium_large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/10\/pinarello-unveils-filippo-gannas-3d-printed-humpback-whale-inspired-hour-record-bike-768x512.jpg",768,512,true],"large":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/10\/pinarello-unveils-filippo-gannas-3d-printed-humpback-whale-inspired-hour-record-bike-1024x683.jpg",800,534,true],"1536x1536":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/10\/pinarello-unveils-filippo-gannas-3d-printed-humpback-whale-inspired-hour-record-bike-1536x1024.jpg",1536,1024,true],"2048x2048":["https:\/\/c01.purpledshub.com\/uploads\/sites\/43\/2022\/10\/pinarello-unveils-filippo-gannas-3d-printed-humpback-whale-inspired-hour-record-bike-2048x1365.jpg",2048,1365,true]},"uagb_author_info":{"display_name":"importmanagerhub@sprylab.com","author_link":"https:\/\/c01.purpledshub.com\/cyclingplus\/author\/importmanagerhubsprylab-com\/"},"uagb_comment_info":0,"uagb_excerpt":"By Simon von Bromley Published: Monday, 03 October 2022 at 12:00 am Pinarello has officially unveiled the Bolide F HR 3D, the bike which Filippo Ganna will use for his upcoming attempt at the UCI Hour Record. In a move Pinarello claims is a \u201cworld-first\u201d, the Bolide F HR 3D uses a 3D-printed construction across…","_links":{"self":[{"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/rss_feed\/42339"}],"collection":[{"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/rss_feed"}],"about":[{"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/types\/rss_feed"}],"author":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/users\/24"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/media\/42340"}],"wp:attachment":[{"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/media?parent=42339"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/c01.purpledshub.com\/cyclingplus\/wp-json\/wp\/v2\/categories?post=42339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}