Slack Randoms: String Drive Bikes, Hydraulic Press Crank Arm Tests, Peter Sagan's Finale Crash & More

Nov 26, 2023 at 6:30
by Ed Spratt  
We use Slack as our workplace communication tool at Pinkbike and we have a #randoms channel that we use to share an assortment of videos and stories from all corners of the cycling world and beyond... We thought a couple of the moments from the past week were too good not to share with a wider audience, so here are some of the highlights.

String Drive Bikes

3D-Printed Titanium vs. Forged Aluminum: Crank Arm Test With Hydraulic Press

bigquotesWelcome back to Hydraulic Press Channel – the place where metal meets its match! In today’s high-pressure episode, we’re meshing the realms of advanced 3D printing technology with the robust world of cycling. Witness the clash of the titans as topologically optimized bicycle cranks go head-to-head with their traditional forged counterparts. ‍♂️

Using cutting-edge 3D printing and state-of-the-art topology optimization, we’ve engineered cranks that are built to withstand the ultimate test. Our 150 ton hydraulic press and 240 ton force sensor are ready to challenge the limits of materials science, and you’ll get to see if these next-gen cranks can outperform the classics in a battle of strength and endurance.

Will these optimized wonders revolutionize the way we think about bicycle crank durability? Tune in to see the power of technology push past the conventional, and discover why topology optimization could be the future of cycling components.
Hydraulic Press Channel

Peter Sagan Goes Over the Bars in Finale

bigquotesHad the chance to join Peter before his XC pro debut in Finale Ligure this was one of his first rides during this week - still a bit sturdy but just after week of riding with @okoeverywhere racing he gained NOT one, but multiple levels in just a few days! suddenly it's hard to drop this wolverine ‍ If he keeps it up, this man is gonna have some steeze @uci_mtbworldseries Simona Kuchyňková

Luckily it sounds like Peter walked away from this unharmed and has since picked up some extra skills as he attempts to gain entry into next year's Paris Olympic's XC race.

Conflicted Relationships with Social Media

bigquotesMy message is simple: Don't miss out on life. Take back control of your attention.

As I attempt to integrate short form content into the Berm Peak ecosystem, I'm more convinced than ever: The less time I spend on social media, the better I feel.

Clearly, social media is essential for my career to even exist, and I have it to thank for the rise of YouTube, and the existence of "creators" in the modern sense. But what originally started as a way to communicate with friends and a way to find interesting content, has become a battle for our attention.

AI is exceptionally good at making predictions like "what shapes and noises will cause this user to continue being engaged". It works well enough to do exactly that, and what I consistently find is that it starts with content I want to see, and then smuggles in the "potato chips" it knows I'll watch. Imagine if your refrigerator had an algorithm that did the same thing.

I must be clear that I'm not directing this at the many talented creators on YouTube Short, Reels, and TikTok who make thoughtful, funny, and inspiring content. In fact, I believe they are the solution. If I could choose to see just them, I would probably still use apps like Instagram and TikTok.

Anyway, this has been eating me alive lately, and I might even be salty about the expectation that creators post to all of these platforms to stay relevant. I've stopped trying to come up with vertical content, and so I just post it when I think of something organically now.
Berm Peak

Craig Evans - Gullystan

bigquotesCraig going hard down Gullystan. Filmed by steel city media. 50to01

A Mouthful of Petrol: coming of age in the world of banger racing

bigquotesWayne is a fixture on the banger racing circuit. Now his son Jai-Dee is nearly 13, his debut race is finally in view.

Wayne, a double amputee, is preparing him mentally for the goal ahead and Jai-Dee is feeling increasing pressure to make his father proud. This cinematic documentary poignantly reframes expectations of masculinity across the generations.
The Guardian

Drone Visuals of Fiji's Islands

bigquotesThe 330 islands that make up the nation of Fiji are home to scenic beaches, crystal clear waters, vibrant coral reefs, perfect waves, and thriving rainforests. If you need some travel inspiration, stress relief, relaxation, or just an ambient nature film, this one's for you. Enjoy 3.5 minutes of calming, tropical paradise visuals + sounds from a birds-eye view (Aka FPV drone). Captured in 4K UHD + 5.3K on GoPro HERO12 Black. GoPro

400 MPH Bowling Ball to the Head at 82,000FPS

Author Info:
edspratt avatar

Member since Mar 16, 2017
2,971 articles

  • 319 1
 From the string drive video "grit significantly affects longevity".
So will this be suitable for use on mountain bikes? I'm a frayed knot.
  • 10 0
 Well done.
  • 20 9
 You win the Internet today. Bonus points for dad joke.
  • 20 1
 There had to be a hitch somewhere.
  • 4 3
 String drive threw me for a loop, but clearly the bowling ball to the head edit was the bitter end.
  • 3 0
 I'm at the end of my rope.
  • 5 0
 If a customer ever brought me one of those to fix it, I'd be fit to be tied.
  • 96 2
 Big fan of Seth and his approach to content. He has a good compass and does a good job of staying true to his ideals and holding himself accountable
  • 2 41
flag kingbike2 (Nov 26, 2023 at 12:43) (Below Threshold)
 This convinced me to sign up for TikTok. Ngl it’s entertaining.
  • 28 2
 I see balls to the face ... I click!
  • 11 0
 My plastic surgeon doesn't want me doing any activity where balls fly at my nose.
  • 10 0
 @barp: I suspect, secretly, he probably does actually.
  • 7 0
 Some might be clueless, but I see you @barp
  • 2 0
 @barp: as if
  • 24 0
 So,I'll never need some fancy ti cranks. Some random aluminium cranks are more than good enough
  • 30 0
 Deep down we've all known that since the 90s, doesn't stop anyone regardless.
  • 15 1
 @Fix-the-Spade: sucks that even those of us that new it beat forgot... Looking at you, Shimano road crank recall. Still nothing beats a basic Shimano mountain crank for function, durability and value, but that recall on the road side is definitely a black eye on an otherwise sterling reputation.
  • 1 0
 You never know that one time your bike gets run over by a car you might be able to reuse your titanium cranks!
  • 2 1
 @Fix-the-Spade: The vast majority of riders just ride nog standard Shimano or SRAM cranks, because they feel no need to pay a shitload extra for basically just some eye candy.
Just because you see stuff like that featured on mtb websites and video's a lot doesn't mean it's representative of real world usage.
  • 2 0
 @WhateverBikes: sure would love some ee Wings though. But yes, most of my bikes have some generation of XT.
  • 2 0
 @BikesBoatsNJeeps: Those like nice, sure. But I'd much rather spend that money on some nice mtb trips that actually provide me extra joy.
  • 24 6
 TIL If a crank breaks it’s always a manufacturing defect as a rider can’t generate the force required to break a crank.
  • 33 1
 I know a LOT of BMX'ers that would question that.....
  • 50 0
 fatigue has entered the chat
  • 18 2
 @naptime: BMX riders breaking cranks are broken by gravitational force, not force generated by pedaling. They have no suspension and jump off a roof to flat.
  • 5 0
 @devinkalt: roof to flat is so crazy to me. The biggest drop I hit is 15 ft and i can’t imagine not using 150mm
  • 7 0
 @mariomtblt: definitely crazy but if you watch how a BMX rider does some thing like that they don't have posture like a mountain biker. They use every inch of their body as suspension to absorb the shock.
  • 7 0
 A 200lbs person generates about 8000lbs of force when dropped from 10ft. Sooo I doubt it’s factory defect
  • 5 0
 @taquitos: I appreciate the reference bro. In a field filled with bro-science, I'm with Mike Bloomberg: In god we trust, but everyone else brings data.
  • 5 0
 dynamic loads have entered the chat
  • 2 2
 I bent Race Face cranks on a g-out back in the day. These days, I take bigger hits etc. but I've never bent my RF cranks. I think my ankles would go first.
  • 1 1
 @devinkalt: thanks for that.... (slow hand clap)
  • 1 0
 @Ebab: so that's why I break cranks....
  • 17 0
 "ugly as hell" - guy-with-hydraulic-press's evaluation of the marketability of 3D printed titanium cranks
  • 2 0
 Loved hearing them talk
  • 17 0
 Pinkbike comment section is my social media.
  • 10 0
 1week out of Social media....I think I've done more in that week, than the last year
  • 5 0
 Surely forklift drivers see normal mtbers content as the algorithm feeding them crap
  • 2 1
 Anyone notice the fork lowers on Sagan's bike? Possibly a zeb prototype w/ red lowers? Seems like there was tape to cover the lettering.

I guess it's possible that it's a lyrik and the cover-up is for sponsor purposes... I'd still like a red zeb tho
  • 3 0
 I’d like that too, but on his instagram the forks bridge looks very marzocchi-ish
  • 2 15
flag DoubleCrownAddict (Nov 27, 2023 at 6:13) (Below Threshold)
 Nevertheless it was unable to absorb a 2" rock and clearly caused the crash. Telescopic forks suck and are not the future.
  • 1 0
 He's on the Specialized Factory Racing team and SRAM / Rockshox is one of their sponsors.
  • 1 0
 He's still contracted with Team TotalEnergies until the end of the year, and they ride Specialized / SRAM as well, so it can't be a cover-up is for sponsor purposes.
  • 6 2
 How about dem fork lift accident videos!
  • 5 5
 I can pick and choose what I watch on Pinkbike. No one is forcing me to watch anything (like Bermpeak blames AI for). But that Trout Lake video last week was the first time in a long time I felt like Pinkbike was feeding me trash.
  • 3 0
 Gullystan? More like GullyShred!
  • 1 0
 Underrated comment. Is it a pun ?, a dad joke? Or grampa just being himself
  • 4 1
 I see a Finnish guy smashing things with a machine--- I click!
  • 1 0
 I wonder if Elon Musk can keep up with the AI for news/social media attention going into 2024? ChatGPT, "what's gonna be the next trend for social and news media?"...
  • 1 0
 the Gullystan edit was fun and impressive…but I’d like to know if it was ridden clipped in or ridden with flat pedals.
  • 1 0
 My guess clipped, looked like a lot of body pick up at times… but a bit of a hidden gem vid. Trail looked awesome! I’m guessing most people are coming down a hell of a lot slower.
  • 1 0
 @JosMaple: na that's bike control not clips lol
  • 1 0
 managed to get a few good pauses, looks like flats! the man is a menace though haha
  • 5 0
 @MartyMcfly2810: A little known feature of Youtube: If you pause, you can then use the comma and period keys to go (respectively) backwards and forwards, one video frame at a time. Much more convenient than trying to pause at the perfect moment! Note that on an embedded video (such as here), you'll have to first close the "other videos" popup that appears when you pause.
  • 1 0
 I'm glad Lauri evidently figured out that those are self-extracting cranks by the end of the video.
  • 2 0
 The song in the Criag Evans video is dope! Cholo Pimp - I'll Be Surprised.
  • 1 0
  • 2 0
 Hey Peter, welcome to MTB.
  • 1 0
 Are you kidding?
  • 1 0
 Stop trying to reinvent the !
  • 1 0
  • 9 1
 @Azrocktester: I don't know about the wheel, but I'm going to start trying to reinvent the exclamation mark. I feel like that's an untapped market.
  • 3 0
 @rrolly: i reinvented the ! already
  • 7 0
 @HankHank: your i’s are upside down again fella Wink
  • 3 0
 I heard Dr Evil's father invented the question mark.
  • 2 0
 @kipvr: he reinverted it.
  • 2 0
 Digital diabetes
  • 1 0
 Can we see the bowling ball shot at the string drive concept?
  • 2 5
 I am absolutely sure the hydraulic press guy can speak perfect English without an accent and it's all just for show!
  • 10 2
 I am absolutely sure you are not absolutely sure.
  • 3 0
 I’m quite sure he is Leo Kokkonen’s uncle, expect chimeral mtb designs to hit you like a pole in your eye from this direction
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