How fast is a Brompton?
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- čas přidán 25. 06. 2024
- Find out the speed difference between a Brompton and a similarly price Road Bike.
We will assume both riders have the same weight, use the same tire type and apply the same power input. We evaluate the speed differential for casual riders as well as performance riders.
00:00 Introduction
00:22 CHPT3 speed
01:25 Drivetrain / Chain
02:12 Drivetrain / Derailleur
03:02 Drivetrain / Internal Hub
04:28 Rolling Resistance
07:01 Speed Difference (Casual Riders)
07:58 Aerodynamics
09:02 Speed Difference (Performance Riders)
09:42 Take Away
References:
www.bicyclerollingresistance....
www.gribble.org/cycling/power... [Cycling Power]
www.ihpva.org/HParchive/PDF/hp...
www.ihpva.org/HParchive/PDF/hp...
Bicycling Science, Fourth Edition, D.G Wilson, MIT Press, 2020
#Brompton #2bikes4adventure
Copyrights
- Music: The Day is Close - The 126ers
- Derailleur Bicycle Drivetrain CC BY-SA 3.0 Wikipedia, Keithonearth
Wow, what have I stumbled upon here? Expecting a cozy Brompton bike channel made by a friendly elderly couple, proceeds to be an absolutely STELLAR explanation of advanced bicycle riding physics. The friendly and clear narration, the positive yet calm music, the consistent and considerate use of standard units (and their translation), the absolutely mindblowing animation (so clear, so detailed!), all of that in one great package. Rarely have I been this impressed by content on CZcams; thank you so much.
If you like this video, feel free to watch our Technical Video Playlist
czcams.com/play/PLY2cxn6D6SpviTXWZVZiIOiDCgHwEOFgU.html&si=XBsBd0xS6Hben8X4
PS We are indeed a friendly elderly couple.
super +1 on this, I was incredibly surprised by the quality of this content!
As a rider of both, I found this very informative. Thanks! You forgot scenario 3 where the Brompton rider decides they don't feel up to the 60km ride, spends a very efficient 30 seconds folding up their bike and hopping on a train to the destination, and having several celebratory beers and a full course meal before the road cyclist reaches the destination. This is one reason why, although loving my road bike, I'll never get tired of my Brompton!
Hahahaha excellent!
I love this 3rd scenario… 😂🍻
True appreciation of the speed they are capable of.
@クリス Yeah Chris: The thing with a Brompton is it's foldability.
Yeah, comparing a folding bike to any road or even racing bike, is never going to make the folding bike look good. The big advantage of a folding bike is that you can fold it and take it with you on a train. Bike to the station, hop on a train, and then bike the last mile to your destination. I bet that's going to be a lot faster than any road bike.
How can anyone condense so much information in such a pleasant and engaging video, with a perfectly written script and beautiful animations... I am stunned! There's no one else on the face of this planet even attempting to make such informative videos on YT, I'm glad we have the two of you!
Funny, my mother was saying the same thing 😀
The videos produced by Brilliantbikes are also very informative, with a slightly different but very helpful perspective.
Wow, this is a Sheldon Brown level of both very detailed physics information and a presentation that makes it very accessible. Great job!
^ so much this. Sheldon Brown must be smiling from the unknown place in the universe he inhabits nowadays. Cycle heaven?
Wow made me miss Sheldon Brown all of a sudden. He would have had a flourishing CZcams channel transferring all the written articles he wrote to videos.
This is how math teachers make learning come alive and relatable to real life.
No kidding :-). I iNSTANTLY fell asleep :-)
I am so absolutely stunned at how amazingly marvelous, informative and just absolutely brilliant your videos are... Someone should be nominating you for an award 🏆🏆 Many many thanks ❤️
It's the sound track.
.
me too!
This was totally not what I expected when I clicked on this video.
This was a very well made and very informative video.
Hope to see more these kind of videos fro his channel. 👍
I'm pleaseantly disappointed as well 😊
Holy cow, this is the best explanation of bikes on youtube
I am so going to use this in my Physics class this year! I teach about rolling resistance and aerodynamics, but always in relation to cars. The info graphics and info here are absolutely fantastic. Thank you!
Stay tuned, a new “physics lesson” video coming up shortly.
I've seen dozens of videos explaining all of this in one form or another, but this was the best and clearest explanation I have ever seen. Thank you for putting this together. Your teaching and illustrating skills are amazing.
This video is absolutely incredible! Thank you so much for producing this kind of content.
Holy moly! I'm really into this stuff inside the competitive cycling world and I watch all the youtube channels that are for "serious" or more racing oriented people and this content is 1000 times better presented, more useful, and more scientific than what I normally come across. I also learned a few new things. Amazing video!
My goodness, this is absolutely stunning stuff. Production value!
This was the most detailed video on this subject i have seen. Well done
This video is a gem. Very well researched and a master class on what influences speed on whichever bicycle. Very well done!
So much effort behind this video, thank you for your hard work!!
Still the comfort and the convenience of the Brompton seems like a fair trade-off.
Brilliantly explained. Both the bicycle enthusiast and physics teacher were completely engaged. Thanks.
This is shockingly well put together
Fantastic video packed full of great information. Thank you!
The best video on the topic I've seen so far. Thank you!
Learned so much from this video. Thanks for putting this together.
Amazing video and explanation! More than what i expected for sure! Thanks for the effort and beautiful illustrations
Oh my good god! Learn something new everyday...thank you Mme Pam!
Fantastic graphics. Brilliantly researched and presented. Well done!
This is an amazingly well structured and informative video. My mind is blown - thank you!
Easily one of the best explanations of the factors affecting bicycle performance I've ever seen! Five thumbs up! And thanks!
Stay tuned, more to come shortly
Extremely well researched and presented. thanks!
What an excellent and very understandable explanation on the different efficiencies of both bikes. Well presented, thank you.
This is just fantastic! Love how you break it down into straight physics. Thanks for this amazing analysis...has applications to a lot of types of riding!
this is the most educational video about bicycle that i found on the internet, thanks for producing this kind of content
This is the best explanation and with a very good use of graphics to make understanding easy.
Wow I clicked this video out of curiosity and came away genuinely surprised and pleased by how informative it is! Thank you! Learned a good deal about bicycle mechanics
Stay tuned for more to come.
Exceptionally informative. One of my favorite videos on CZcams ever, saying that as an engineer who's been watching a lot of informative engineering videos since years.
Stay tuned, more technical videos to come.
Stunning vid. Thanks for this accurate analysis.
Thank you for a very informative and well made video! Absolutely loved it!
Very clear explanation and very informative. Thank you
Wow, love this video. Now I know why I prefer to tour on my Brompton; more time to smell the roses.
The most informative and enjoyable bike channel I've ever found on youtube. This upload is simply amazing. Subbed...
What a delightful instruction and diagram set. Kudos!
Really informative. Thanks for sharing.
Even a road bike rider could be benefitted by this video,awesome job!
Sounds surprisingly clear and logical. Very informative.
Amazing video, incredibly informative! Thanks for sharing!
I'm always so happy to see your videos! They're so detailed, well researched, and your graphics are excellent. I was watching your video and my husband overheard and was immediately fascinated. He's an engineer so it totally appealed to him. =)
Graphs and equations: basic food group for engineers
Thank you for the great video, really professionally made
I did not expect this when clicking on the video thumbnail. Needless to say, the video completely blew me away, too!
Very informative video, thank you so much, now I can relate to my experience using both type of bikes
Perfect explained! Thank you.
Wow, this was an unexpected pleasure. Great video!
Amazingly well done video. Thank you!
wow, this is a master degree essay, thanks a lot
Wow this was wonderfully informative. Way beyond what I expected when clicking on the vid. I ride a Mountain Bike primarily for cardio calorie burn, it's better for my purposes than a road bike because about 1/4 of my daily circuit is off of the paved roads. I have a salvaged BMX that I use for my backup bike (when the primary bike is down with a flat, etc. and I don't have time to fix it before my riding window) - and I'm planning to replace my BMX with a Brompton style folding ebike, so was doing some research on how they ride. This was a great vid, thanks for diving deep in your analysis. Have an awesome weekend!
Excellent and unexpectedly detailed but comprehensible explanation!
Amazingly in depth video
Very informative and well put together
Awesome content, so clear and informative.
Wow. That was very interesting and puts it all in perspective. Thanks.
Another insanely informative video 👌
The best tire review for 16 349 . Thanks !
This was superb, thanks.
Fantastic video. You are a great teacher.
I clicked on this video hoping to learn something yes...but I wasn't expecting was a whole ass maths lecture lol. In all honesty, thank you for this insightful video. Safe ride everyone!
Thank you for the amazing explanation!
wow, this is mindblowing analysis! amazing!
Excellent work 👏
this was unexpectedly informative, thanks!
Stay tuned for more videos
Fascinating video, thank you.
wow, amazing presentation and analysis
really excellent video. Thanks!
Omg. Very detailed and informative. Kudos!
Wow the information on this video is impressive! Well done!
You are so amazing with your videos and physics lessons! Bravo!
Wiw! 😮 I think I have just arrived at "explanation heaven"! ❤️
That has got to be the most wonderfully presented explaination on this topic that I have ever seen (and I have seen LOTS!).
The slow pace of transition from one frame to the next, and the moderate pace and the very clear diction of the narrator meant that I understood everything without having rewind or replay numerous time.
Added to that was the calming backing track and the dulcet tones of the narrator.
A joy! ❤️
I really do think the narrator would make a great living doing voice-overs or making instructional videos for a variety of clients.
Awesome.
Thanks.
This video was so good that I have now subscribed to this channel just so I can watch more videos (no matter what the topic is! 🙂👍)
Thank you, the same voice narrates our complete video library, for your listening pleasure.
You did a ton of work for this video. Good work.
Great analysis , good job
Awesome video! Thanks a ton!
Thanks. Very informative. The difference is less than I anticipated. There are other high performance folders such as the Canadian made Helix. It has 24" tires but folds remarkably compact and is much closer to a full sized bike in performance.
Wow, I didn't expect such scientific and detailed review, nice one!
What an EXCELLENT video! EXCELLENT graphics, EXCELLENT physics, beautifully illustrated and narrated. And about 500% better than I was expecting! Thank you so much!
And a special bonus someone who can actually pronounce derailleur in French! Now that Brompton has a 4-speed derailleur we lose the friendly Sturmey-Archer 2nd gear, I think. All the best, Rob in Switzerland
Hi Rob. The 4speed derailleur (insert french pronunciation here) will be more efficient and lighter than the Sturmey-Archer (for a similar gear range), but at a substantial increase in cost. We will keep our 6 speed for now.
Wow this is the most detailed and well explained video I have seen on bicycle power efficiency, very impressed and unexpected. Honestly speechless.
Stay tuned for more (and/or watch some of our previous Brompton-related technical videos)
wow! stunning video. THANKS!
bro this vid is stacked with info! THANK YOU!!! SUBBED!!!
Welcome to the channel. Stay tuned for more.
This is a ridiculously good video. Thank you. Very very impressive
Wouahhhh !!!! Superbe vidéo très enrichissante et impécablement présentée. un grand MERCI !!!
Nous vous invitons à jeter un coup d’oeil à nos autres vidéos (ex.: czcams.com/video/VwRR3Ubp0DU/video.htmlsi=8VsZYBMPUBztC4uN )
Awesome video! great content
Outstanding analysis! 👏
What an excellent video, thank you!
Marvellous work, thank you! In practice I find my Brompton pretty similar to my road bike in terms of speed, maybe because I normally have the aerodynamic load of panniers on the latter, as opposed to a rucksack in my slipstream on the Brompton. I proudly remember one occasion when riding my Brompton, I found myself with a couple of club road bike riders slipstreaming me :-). I was fortunate enough to compete in the Brompton World Championship once, too -- and that felt like pretty scary full-on bike racing, with welcome straw bales on the corner obstacles. Thank goodness the tarmac was dry at least, as cornering traction is not a Brompton forte...
This is the most awesome video I’ve seen on this
Nice diagrams. Keep making the great content.
Excellent work. Thanks for a great explanation of why I prefer my road bike with panniers over my Brompton in even short commutes to work- except for the cool factor in riding the Brompton, which is worth several km per hour!
Amazing Video. So much information
The animations are awesome as well 👍🏼👍🏼👍🏼
crazy effort on the graphics!!!
People like you are why we have come so far as humanity, thanks
I love how informative and yet accessible you make your videos with the visuals and the thorough explanations. Are you an engineer?
Thank you Pam, you're amazing!
Pam is a technical writer and Gilbert is an engineer, a great team since 1993.
@@2Bikes4Adventure amazing, phenomenal, Immaculate team! Thank you both very much for your efforts in making this information accessible to others.
Amazing video.
Thank you.
wow your tech videos are incredible
What an interesting video. Thank you!
This got surprisingly technical. Refreshing. I learned.
@LydellAaron, this one on Brompton Acceleration does contain some technical content as well.