8

I'm considering buying one of these with a 28" front wheel, pneumatic tires and rear caliper brakes. How do they compare to actual penny-farthings? I've read on another forum with unreliable responses (non-riders giving opinions based on movies) that any high wheel bike should only be ridden on pavement to keep from taking a header. Would this be an issue with the kind of bike I'm interested in?

I wasn't actually asking about functionality as a commuter bike. For that I like a cruiser. I want something to have fun with. Oddly enough I don't like heights so penny-farthings make me a little anxious. I suppose it's from being fairly high up without much of anything beneath me. I do know that it is necessary to pedal against the bike when slowing down. Applying the back brake first is helpful in preventing a header within theory. Most people walk a penny-farthing down hills. True penny-farthings have solid rubber tires. This one has pneumatic tires. The big wheels are supposed to just roll over ruts unless they are big ruts. This front wheel is much smaller. Does that mean that it takes a header over every rut? The high wheel bikes put the rider almost over the pedals. This one technically puts the rider slightly farther back since the legs are longer in relation to the radius of the wheel. Does that help keep the bike from flipping forward? Sorry to be so techincal but that's sort of why I was hoping someone here rides one.

  • What is taking a header? – Swifty Apr 7 at 21:02
  • 2
    @Swifty a "header" is short for "head-over-heels" tumble or a head-dive, or an Over The Bars (OTB) where the rider continues forward while the bike stops quickly. – Criggie Apr 8 at 21:59
  • 1
    @Criggie arse over tit? – Swifty Apr 8 at 22:03
10

My impression is they're a toy only, not to be used for travelling, just tootling around a park or around home.

My unicycling coworker has said that they are essentially unicycles with a training wheel, and are a lot of fun for playing about. Also, I've seen video of them being used in street performances like a juggler or similar.

But no, you wouldn't commute on one, and the ergonomics would make training on one uncomfortable. The 29" wheel would suit a kid, not a grown adult.

Additionally, with no gearing, their top speed is limited to one wheel circumference per pedal revolution. So this 29" wheel will have a rolling circumference of about 29" x pi or about 91" or 2.3 metres. At 60 and 80 RPM that would be 8.2 km/h (5 mph) or 11 km/h (6.8 mph) which is a fast-walk/slow-jog to an "average runner's speed".

Said another way, they probably fixed gears so you cannot coast, you have to pedal.

The rear brake will be mostly useless - the common wisdom is that the front brake of a bike does most of the real work of braking. Trying to stop with the rear brake only simply drags it out longer. Your mini-farthing will likely stop poorly on brakes, relying more on fixie-skills like reverse pedal pressure, and that its overall speed is low.

I'm sure they're a lot of fun, but not a lot more than that. With practice and good technique, I'm sure they can be ridden all sorts of places, but perhaps not aggressive/risky offroad/downhill etc.

From https://www.flickr.com/photos/47807201@N00/4556317545
Example of a MPF with quite a lot of rake.

Brie Messenger Bike by Vanguard Bikes.
Highly vertical forks with minimal rake.

The two bikes above would have massively different handling - no conventional bike would risk having such a vertical head tube.

| improve this answer | |
  • I can't comment on handling because there's no detail about the geometry - some of the modern ones use a fork with much more rake than the traditional frames, giving some various level of trail and self-centering. – Criggie Apr 6 at 5:20
  • 1
    I don't understand why they're not built with big unicycle wheels. Both the speed and the appearance would be improved by a 36" wheel – Chris H Apr 6 at 6:21
  • @ChrisH Ross at work rides a 32" wheel, but the seat post adds another 25". He has to ride on 29" tubes overinflated because suitable 32" are very hard to find and expensive so bigger sizes will simply cost a lot more. Also, 29" to 32" is roughly 3" more, 10% which is about 10% more circumference and therefore speed at the same cadence. To get road-bike speeds of 80-100 gear inches, one needs an 80-100" diameter wheel, and then you've just invented the penny farthing. Part of the appeal of a mini-PF is small-and-cute? – Criggie Apr 6 at 6:46
  • 1
    I suppose these do carry off small/cute quite well. But a 36" would be about 50% of a penny farthing and a good 20% more than a 29". I see what you mean about tube prices. 36" tubes are ~£20 from a unicycle shop online, they don't sell 32", and 29" are (of course) about £5. – Chris H Apr 6 at 7:42
  • 2
    @ChrisH there definitely are mini-penny's based on pneumatic tire 36er unicycle wheels; and indeed, that's really the smallest that remotely makes sense. Though the "farthing" is a bit superfluous ;-) – Chris Stratton Sep 1 at 4:13

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.