How fast is a Brompton?

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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

Опубликовано:

7 июн 2024

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Комментарии : 677

@Quetzacoatl85 2 месяца назад

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 RU-vid; thank you so much.

@2Bikes4Adventure 2 месяца назад

If you like this video, feel free to watch our Technical Video Playlist ru-vid.com/group/PLY2cxn6D6SpviTXWZVZiIOiDCgHwEOFgU&si=XBsBd0xS6Hben8X4 PS We are indeed a friendly elderly couple.

@esesoysho Месяц назад

super +1 on this, I was incredibly surprised by the quality of this content!

@Chris-xz2il 2 года назад

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!

@Boub65 2 года назад

Hahahaha excellent!

@handsonbrompton7875 2 года назад

I love this 3rd scenario… 😂🍻

@whazzat8015 2 года назад

True appreciation of the speed they are capable of.

@geraldshields9035 2 года назад

@クリス Yeah Chris: The thing with a Brompton is it's foldability.

@MartijnVos 2 года назад

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.

@EverydayCycling 2 года назад

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!

@2Bikes4Adventure 2 года назад

Funny, my mother was saying the same thing 😀

@tim2015 Год назад

The videos produced by Brilliantbikes are also very informative, with a slightly different but very helpful perspective.

@alb.2021 2 года назад

This is how math teachers make learning come alive and relatable to real life.

@dawnjohnson8739 6 месяцев назад

No kidding :-). I iNSTANTLY fell asleep :-)

@JBBell 2 года назад

Wow, this is a Sheldon Brown level of both very detailed physics information and a presentation that makes it very accessible. Great job!

@alxie 2 года назад

^ so much this. Sheldon Brown must be smiling from the unknown place in the universe he inhabits nowadays. Cycle heaven?

@bmp12 11 месяцев назад

Wow made me miss Sheldon Brown all of a sudden. He would have had a flourishing RU-vid channel transferring all the written articles he wrote to videos.

@jimmymacdad8194 2 года назад

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 ❤️

@whazzat8015 2 года назад

It's the sound track.

@zaharyaacob Год назад

@user-ot1dv6ri4f Год назад

me too!

@TheAnimejosh 2 года назад

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. 👍

@bisiklettin Год назад

I'm pleaseantly disappointed as well 😊

@guycharron11 2 года назад

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.

@graemehill 2 года назад

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!

@reptoJane Год назад

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!

@2Bikes4Adventure Год назад

Stay tuned, a new “physics lesson” video coming up shortly.

@Thinkrock 2 года назад

This video is absolutely incredible! Thank you so much for producing this kind of content.

@redstwok1123 10 месяцев назад

Holy cow, this is the best explanation of bikes on youtube

@jeffyen 2 года назад

My goodness, this is absolutely stunning stuff. Production value!

@pokie0622 2 года назад

This was the most detailed video on this subject i have seen. Well done

@alxie 2 года назад

This video is a gem. Very well researched and a master class on what influences speed on whichever bicycle. Very well done!

@ottorocket03 Год назад

Amazing video and explanation! More than what i expected for sure! Thanks for the effort and beautiful illustrations

@barrydonaldson 2 года назад

Fantastic graphics. Brilliantly researched and presented. Well done!

@stf0146 2 года назад

The best video on the topic I've seen so far. Thank you!

@Ozz527 2 года назад

Fantastic video packed full of great information. Thank you!

@boatman222345 2 года назад

Easily one of the best explanations of the factors affecting bicycle performance I've ever seen! Five thumbs up! And thanks!

@2Bikes4Adventure 2 года назад

Stay tuned, more to come shortly

@fender1000100 Год назад

The most informative and enjoyable bike channel I've ever found on youtube. This upload is simply amazing. Subbed...

@jonathanabelheim5932 2 года назад

This is an amazingly well structured and informative video. My mind is blown - thank you!

@stevethecat9194 2 года назад

Brilliantly explained. Both the bicycle enthusiast and physics teacher were completely engaged. Thanks.

@ABDLLHSDDQI Год назад

Exceptionally informative. One of my favorite videos on RU-vid ever, saying that as an engineer who's been watching a lot of informative engineering videos since years.

@2Bikes4Adventure Год назад

Stay tuned, more technical videos to come.

@AndrewTiedeplus 2 года назад

This is shockingly well put together

@linusloo 2 года назад

Learned so much from this video. Thanks for putting this together.

@supeinjinsan 2 года назад

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.

@pixfirewall 2 года назад

This is the best explanation and with a very good use of graphics to make understanding easy.

@fuwafuwadance 2 года назад

this is the most educational video about bicycle that i found on the internet, thanks for producing this kind of content

@grahamatsea3575 Год назад

What an excellent and very understandable explanation on the different efficiencies of both bikes. Well presented, thank you.

@lilelbee423 2 года назад

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

@2Bikes4Adventure 2 года назад

Stay tuned for more to come.

@engjoo 2 года назад

Extremely well researched and presented. thanks!

@vjs1991 2 года назад

Thank you for a very informative and well made video! Absolutely loved it!

@sven_ftw Год назад

What a delightful instruction and diagram set. Kudos!

@cmchenth 2 года назад

Even a road bike rider could be benefitted by this video,awesome job!

@s.bruyere8496 2 года назад

Stunning vid. Thanks for this accurate analysis.

@andymonis5368 Год назад

Very informative and well put together

@manueledelisio 2 года назад

Amazing video, incredibly informative! Thanks for sharing!

@make.and.believe 2 года назад

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!

@natjes6017 2 года назад

Wow, this was an unexpected pleasure. Great video!

@rogberube6422 2 года назад

Really informative. Thanks for sharing.

@rodolfobelmar4797 2 года назад

Thank you for the great video, really professionally made

@Mr89Falcon Год назад

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!

@paullevy-adophy9198 3 месяца назад

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! 🙂👍)

@2Bikes4Adventure 3 месяца назад

Thank you, the same voice narrates our complete video library, for your listening pleasure.

@craiglouw4057 2 года назад

Another insanely informative video 👌

@jonathanb3255 2 года назад

Amazingly well done video. Thank you!

@shan1luv1 2 года назад

Awesome content, so clear and informative.

@user-pi7xw3fi1d 2 года назад

wow, amazing presentation and analysis

@madiantin 2 года назад

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. =)

@2Bikes4Adventure 2 года назад

Graphs and equations: basic food group for engineers

@peterforde9513 2 года назад

Wow, love this video. Now I know why I prefer to tour on my Brompton; more time to smell the roses.

@Tony-tq4tx 2 года назад

Sounds surprisingly clear and logical. Very informative.

@mdlmina01 2 года назад

Omg. Very detailed and informative. Kudos!

@hawkenfox 2 года назад

Wow the information on this video is impressive! Well done!

@allismg5691 6 месяцев назад

Amazingly in depth video

@debruce 2 года назад

wow, this is mindblowing analysis! amazing!

@MrGabirahellim 2 года назад

Perfect explained! Thank you.

@batlin 6 месяцев назад

Excellent and unexpectedly detailed but comprehensible explanation!

@sbsb4995 2 года назад

Fantastic video. You are a great teacher.

@burakturan8236 2 года назад

Excellent work 👏

@AlexRusAlex 11 месяцев назад

Thank you for the amazing explanation!

@keaixiaomeinv Год назад

I did not expect this when clicking on the video thumbnail. Needless to say, the video completely blew me away, too!

@geekygramp 2 года назад

Very clear explanation and very informative. Thank you

@jrushen4235 2 года назад

Wow. That was very interesting and puts it all in perspective. Thanks.

@user-zg6qh1bk8y 2 года назад

Great analysis , good job

@BELLAPHONTOO 2 года назад

Oh my good god! Learn something new everyday...thank you Mme Pam!

@wilfdarr 2 года назад

You did a ton of work for this video. Good work.

@bucketofbarnacles 11 месяцев назад

This was superb, thanks.

@fitforbirdie1083 2 года назад

The animations are awesome as well 👍🏼👍🏼👍🏼

@JeanPierre-980 Месяц назад

Wouahhhh !!!! Superbe vidéo très enrichissante et impécablement présentée. un grand MERCI !!!

@2Bikes4Adventure Месяц назад

Nous vous invitons à jeter un coup d’oeil à nos autres vidéos (ex.: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-VwRR3Ubp0DU.htmlsi=8VsZYBMPUBztC4uN )

@RobWhittlestone 2 года назад

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

@2Bikes4Adventure 2 года назад

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.

@AI-xi4jk 2 года назад

Outstanding analysis! 👏

@delgaldo2 Год назад

really excellent video. Thanks!

@dronejunglistplatoon Год назад

bro this vid is stacked with info! THANK YOU!!! SUBBED!!!

@2Bikes4Adventure Год назад

Welcome to the channel. Stay tuned for more.

@paulfaulkner6299 2 года назад

What an educational video. I don't ride a Brompton or any other fold away bike but I do ride a flat handle-barred so called hy-brid. I have 3 cranks and 7 speeds at the back being 28, 38 & 48 over 34, 24, 21, 18, 15, 13 & 11. I know intuitively that I will always lose out to "racers" because of their aerodynamics - but i just wanted to say that even though I don't have either of the 2 bike types mentioned in the video, I learned something. The most important thing is to get a bike you like and enjoy riding it. My friends keep bugging me to buy a racer - but I just prefer "sit up and beg" over bending forwards for hours looking through my eyebrows! The main thing is that cycling is healthy and good for the environment. Happy safe cycling everyone. Have a great Xmas & 2022!

@2Bikes4Adventure 2 года назад

Hi Paul. The important is to enjoy the freedom it provides, what ever shape or form it has.

@infinati 2 года назад

Awesome video! great content

@grouchy88 Год назад

this was unexpectedly informative, thanks!

@2Bikes4Adventure Год назад

Stay tuned for more videos

@goku445 2 года назад

Wow, I didn't expect such scientific and detailed review, nice one!

@happyswissjoe 2 года назад

You are so amazing with your videos and physics lessons! Bravo!

@ONEly-uc4et 4 месяца назад

Nice diagrams. Keep making the great content.

@rasmus9311 Год назад

Wow this is the most detailed and well explained video I have seen on bicycle power efficiency, very impressed and unexpected. Honestly speechless.

@2Bikes4Adventure Год назад

Stay tuned for more (and/or watch some of our previous Brompton-related technical videos)

@johnwight6041 Год назад

This is the most awesome video I’ve seen on this

@andyfairchild2383 2 года назад

Fascinating video, thank you.

@maievshinoda9442 Год назад

The best tire review for 16 349 . Thanks !

@jpchiles 2 года назад

AWESOME VIDEO 👏🏻👌🏻!!

@Longshot_096 10 месяцев назад

Awesome video! Thanks a ton!

@Gregorydyesmith 2 года назад

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!

@IbraHimself 2 года назад

I stumbled upon this video after viewing GCN's Brompton vs road bike video. Thank you very much for this well montaged explanatory video.

@2Bikes4Adventure 2 года назад

Too bad GCN’s video wasn’t on a flat road (could have been used to confirm (or disprove) our calculation).

@SingaporeUntold 2 года назад

@@2Bikes4Adventure I think no challenge as the road bike will obtain a faster top speed

@dysfunctionalisme 2 года назад

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!

@Swalkervf1s 2 года назад

wow, this is a master degree essay, thanks a lot

@terryc8164 2 года назад

What a brilliant piece of work. There has long been the "Bromptons are dead slow " type comments, but your calculations stack up with what I have found in practice. My P6R and old 1980s 5 speed "racer" show differences in average speed in the 1.5 to 2.0 mph range. Pretty close to your calculations. I must add though it depends greatly on the rider, when commuting on my Brompton I used to enjoy passing the lycra clad fancy road bike riders and wishing them good morning etc 😁 Can't do that anymore sadly!!!

@2Bikes4Adventure 2 года назад

Hi Terry. Older roadies are probably slower too by now.

@DiegoCamarero Год назад

wow! stunning video. THANKS!

@Boub65 2 года назад

Very informative video, thank you so much, now I can relate to my experience using both type of bikes

@ngchiwo 2 года назад

Amazing Video. So much information

@cwartcam Год назад

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...