Admit your ignorance - things you've only just realised/learned

[N0bodyOfTheGoat]

To me it looked like his standard setup has his knees coming up above the bars. Personal opinion but I'd have said that was too low in the first place. Happy to be shot down, especially as I now have evidence to back me up. 😉

In the name of inprecise science, I've just sat on my road bike barefoot using the electric meter cupboard to hold on to for balance and with my right pedal roughly parrellel to the ground and forward, the top of my right knee is floating hand on the same horizontal plane as 15mm of spacers above the conical spacer.

Lower back has been a bit dodgy recently, so there's an additional 15mm spacers under the adjustable Deda stem (when good all 30mm spacers under stem, luckily steerer is alloy, so internal steerer support not critical), that's at -30 degrees. BB to saddle top is ~72cm, saddle tip to bar tops is ~54cm, saddle top to bar tops drop is ~3.5cm. Bar tops ~94cm off the floor. Head angle 72.5 degrees, 210mm headtube (610mm stack).

All good to flip the stem to +40 degrees for the aero gains?

 

[Pblakeney]

In the name of inprecise science, I've just sat on my road bike barefoot using the electric meter cupboard to hold on to for balance and with my right pedal roughly parrellel to the ground and forward, the top of my right knee is floating hand on the same horizontal plane as 15mm of spacers above the conical spacer.

Lower back has been a bit dodgy recently, so there's an additional 15mm spacers under the adjustable Deda stem (when good all 30mm spacers under stem, luckily steerer is alloy, so internal steerer support not critical), that's at -30 degrees. BB to saddle top is ~72cm, saddle tip to bar tops is ~54cm, saddle top to bar tops drop is ~3.5cm. Bar tops ~94cm off the floor. Head angle 72.5 degrees, 210mm headtube (610mm stack).

All good to flip the stem to +40 degrees for the aero gains?

Do whatever suits you to alleviate your back pain but raising your bars sounds like a sensible option.

 

[Chris S]

My Sturmey Archer clone 3-speed trigger shifter has 4 detents. It could also be used with a 4-speed hub.

 

[Chris S]

Mexicans really do refer to Americans as 'Gringos'.

 

[ColinJ]

I thought that the unit of pressure 'bar' was defined as the notional 'average' atmospheric pressure at sea level. Wrong! It is a (deprecated) unit equal to 100,000 pascals. It is coincidental that atmospheric pressure at sea level is approximately 1 bar, currently typically around 1.013 bar.

 

[DaveReading]

I thought that the unit of pressure 'bar' was defined as the notional 'average' atmospheric pressure at sea level. Wrong! It is a (deprecated) unit equal to 100,000 pascals. It is coincidental that atmospheric pressure at sea level is approximately 1 bar, currently typically around 1.013 bar.

In aviation, atmospheric pressure until recently used to be quoted in millibars, with "standard" pressure (designed to ensure that all aircraft use the same datum) defined as 1013.25 mb, except for countries like the USA where they use inches of mercury instead (29.92 in being "standard").

Nowadays, while most countries still use millibars, they are normally labelled as the equivalent SI unit, the hectopascal (hPa).

 

[matticus]

I thought that the unit of pressure 'bar' was defined as the notional 'average' atmospheric pressure at sea level. Wrong! It is a (deprecated) unit equal to 100,000 pascals. It is coincidental that atmospheric pressure at sea level is approximately 1 bar, currently typically around 1.013 bar.

I've always thought this was a truly amazing coincidence, and that I must have missed some other part of the history that explains it!

(more so than our sun/moon/earth geometry being just perfect for gorgeous solar eclipses. )

 

[Dogtrousers]

I thought that the unit of pressure 'bar' was defined as the notional 'average' atmospheric pressure at sea level. Wrong! It is a (deprecated) unit equal to 100,000 pascals. It is coincidental that atmospheric pressure at sea level is approximately 1 bar, currently typically around 1.013 bar.

Well one Pascal is one Newton/square metre. And one metre was originally defined as 1/10,000,000 of the distance from the pole to the equator (via Paris, calling in at the home of the kilogram)

Which just goes to show. . something. Probably.

 

[ColinJ]

Well one Pascal is one Newton/square metre. And one metre was originally defined as 1/10,000,000 of the distance from the pole to the equator (via Paris, calling in at the home of the kilogram)

Which just goes to show. . something. Probably.

You saved me the bother of reminding myself how the metric (SANE!) units were originally defined.

Hectopascals (or millibars) seem so much more sensible than inches of mercury!!!

 

[rikki]

I've always thought this was a truly amazing coincidence, and that I must have missed some other part of the history that explains it!

(more so than our sun/moon/earth geometry being just perfect for gorgeous solar eclipses. )

Thanks
That reminds me. We get a total lunar eclipse next Monday morning.

 

[Punkawallah]

Well one Pascal is one Newton/square metre. And one metre was originally defined as 1/10,000,000 of the distance from the pole to the equator (via Paris, calling in at the home of the kilogram)

Which just goes to show. . something. Probably.

Thank the gods it was based in Science, rather than just measuring a column of mercury. Phew!

 

[Chris S]

Next door's cat doesn't recognize me when I'm wearing my glasses. It scarpers when it sees me, normally it comes over and gets stroked.

 

[Gwylan]

Next door's cat doesn't recognize me when I'm wearing my glasses. It scarpers when it sees me, normally it comes over and gets stroked.

My next door cat, very wisely, does her best to vanish when she sees me.
I am not a cat person. Especially when they trat my garden as a toilet.

 

[ClichéGuevara]

One I wished I learned earlier.

Never try to break wind under 2 hours after eating fermented food.

 

[Dave7]

One I wished I learned earlier.

Never try to break wind under 2 hours after eating fermented food.

Photo evidence ???