this post was submitted on 01 Jul 2026
32 points (100.0% liked)

No Stupid Questions

48721 readers
1683 users here now

No such thing. Ask away!

!nostupidquestions is a community dedicated to being helpful and answering each others' questions on various topics.

The rules for posting and commenting, besides the rules defined here for lemmy.world, are as follows:

Rules (interactive)


Rule 1- All posts must be legitimate questions. All post titles must include a question.

All posts must be legitimate questions, and all post titles must include a question. Questions that are joke or trolling questions, memes, song lyrics as title, etc. are not allowed here. See Rule 6 for all exceptions.



Rule 2- Your question subject cannot be illegal or NSFW material.

Your question subject cannot be illegal or NSFW material. You will be warned first, banned second.



Rule 3- Do not seek mental, medical and professional help here.

Do not seek mental, medical and professional help here. Breaking this rule will not get you or your post removed, but it will put you at risk, and possibly in danger.



Rule 4- No self promotion or upvote-farming of any kind.

That's it.



Rule 5- No baiting or sealioning or promoting an agenda.

Questions which, instead of being of an innocuous nature, are specifically intended (based on reports and in the opinion of our crack moderation team) to bait users into ideological wars on charged political topics will be removed and the authors warned - or banned - depending on severity.



Rule 6- Regarding META posts and joke questions.

Provided it is about the community itself, you may post non-question posts using the [META] tag on your post title.

On fridays, you are allowed to post meme and troll questions, on the condition that it's in text format only, and conforms with our other rules. These posts MUST include the [NSQ Friday] tag in their title.

If you post a serious question on friday and are looking only for legitimate answers, then please include the [Serious] tag on your post. Irrelevant replies will then be removed by moderators.



Rule 7- You can't intentionally annoy, mock, or harass other members.

If you intentionally annoy, mock, harass, or discriminate against any individual member, you will be removed.

Likewise, if you are a member, sympathiser or a resemblant of a movement that is known to largely hate, mock, discriminate against, and/or want to take lives of a group of people, and you were provably vocal about your hate, then you will be banned on sight.



Rule 8- All comments should try to stay relevant to their parent content.



Rule 9- Reposts from other platforms are not allowed.

Let everyone have their own content.



Rule 10- Majority of bots aren't allowed to participate here. This includes using AI responses and summaries.



Credits

Our breathtaking icon was bestowed upon us by @Cevilia!

The greatest banner of all time: by @TheOneWithTheHair!

founded 3 years ago
MODERATORS
 

Why are bike tires so narrow and large diameter compared to car tires? What tradeoffs are here exactly? Motorcycle and some ebike tires are more similar to car tires than to bike tires, so i guess it has something to do with braking length at maximum expected speed, and probably also with weight of vehicle, as to not exceed some specified pressure on road. There has to be so many more reasons (weight? air resistance? some other things affecting efficiency or safety? ???)

update: apparently friction involving things that are bendy is monstrously complicated subject, and also there are material limits like maximum allowed shear stress

you are viewing a single comment's thread
view the rest of the comments
[–] OhNoMoreLemmy@lemmy.ml 1 points 5 hours ago* (last edited 5 hours ago) (1 children)

I think it only holds if it's a magic engine that always hits the same max RPM regardless of load, and the transmission is the same.

Otherwise the top land speed record would be held by a monster truck.

[–] rain_enjoyer@sopuli.xyz 2 points 5 hours ago (1 children)

yeah this sounds like "all else equal" case but all else is very much not equal

[–] AeroNaut@lemmy.world -1 points 4 hours ago (1 children)

Yes, as you've guessed I've only shared a generalisation as it seemed like you were confused and this is "no stupid questions". I'm an engineer, so I'm aware that there are assumptions: you'll have to make reasonable ones based on your specific case or you won't reach a practical solution.

Where you go from there is specific to your application and powertrain conditions, and of course there are practical limits as you've started to discover with material constraints.

If you can be more specific I think you can get some better answers, if not all the best: AI is your friend here.

[–] rain_enjoyer@sopuli.xyz 1 points 2 hours ago

AI is your friend here.

nah pass im good