What are Mechanical Vectors of raising handlebars

resovoir

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To all those with a degree in Mechanical Engineering or a lot of experience.

What situation below allows cornering with the least movement of the bars on my 1250GS TE when riding.
a) straight up risers
b) raise up and bring the bars nearer to the body
c) bringing the bars nearer to the body without raising the height

I appreciate there are other considerations such as; is there a bend at the riders elbows , how far leaning forward is the rider, length of rider's body and pressure downward or on the bars etc.
I would appreciate if possible a response regarding the vectors involved of different position of the bars as asked above in a), b) and c)

Please keep answer simple I have limited memories of vectors. :rob

Cheers
 
I would say that they would all be the same as surely it is pressure on the inside corner bar that does the work.
Obviously if you change the bars for longer or shorter the the leverage will change and thus the pressure required, but in the real world, wouldn't this be negligible?

BWTFDIK.
 
resovoir said:
To all those with a degree in Mechanical Engineering or a lot of experience.

What situation below allows cornering with the least movement of the bars on my 1250GS TE when riding.
a) straight up risers
b) raise up and bring the bars nearer to the body
c) bringing the bars nearer to the body without raising the height

I appreciate there are other considerations such as; is there a bend at the riders elbows , how far leaning forward is the rider, length of rider's body and pressure downward or on the bars etc.
I would appreciate if possible a response regarding the vectors involved of different position of the bars as asked above in a), b) and c)

Please keep answer simple I have limited memories of vectors. :rob

Cheers
Click to expand...

If you are a good rider none of the above matters, however to me the ergonomics where more important. So my bar is shorter, higher and more towards me. Elbows bent. I corner just the same but I now am comfortable. Ref vectors...scroll down the page all the formulas are there. Enjoy:D
https://en.wikipedia.org/wiki/Bicycle_and_motorcycle_dynamics
 
From an uninformed opinion it is the length of the bars not the height or positioning of them that matters for your purposes
 
Mines are up and back to achieve perfect ergonomics (with lowered foot pegs and seat on high position front and back). Had the same on my previous 4 bikes (non-BMW). The most important thing is that I feel safer and more confident in corners.
 
I personally would not get myself tied up in physics knots.

If you're looking to improve the way your bike steers and 'handles' for want of a better word, then you need to look at you the rider, and your ergonomics.


The best way to steer a bike is to be able to push the bars directly forward with forearms parallel to the ground. If you dilute this push by having a, shall we call it, a 'propped up position', (and that push stops being parallel and starts becoming 45 degrees) then the push of steering becomes diluted.

Bar risers are a great way of helping you achieve this. I think im right is saying that John McGuiness replaces his clip ons with bars to help him road race.

So my advice would be to sit on your bike, put yourself in your natural riding position, and try and guesstimate where you want your bar ends to be to fit you (with a nice relaxed arm that has a good bend in the elbow) and go from there

:thumb


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resovoir said:
To all those with a degree in Mechanical Engineering or a lot of experience.

What situation below allows cornering with the least movement of the bars on my 1250GS TE when riding.
a) straight up risers
b) raise up and bring the bars nearer to the body
c) bringing the bars nearer to the body without raising the height

I appreciate there are other considerations such as; is there a bend at the riders elbows , how far leaning forward is the rider, length of rider's body and pressure downward or on the bars etc.
I would appreciate if possible a response regarding the vectors involved of different position of the bars as asked above in a), b) and c)

Please keep answer simple I have limited memories of vectors. :rob

Cheers
Click to expand...
My limited knowledge of Vectors is they were made by Vauxhall in the 1960's up to 1975 and rusted before your very eyes .

Sent from my SM-G981B using Tapatalk
 
As a shorty the bars as std were too far away, I had to ride with my arm almost straight which means having to push the bars from the shoulder. This is not good for relaxed and loose riding position. I fitted the Rox adjustable 50mm risers, this brings the bars back about 45mm then I rotated the bars down so the hand grips are about the same height as std. I can now ride with a more upright posture with a bend at the elbow, this gives so much more control and comfort, and therefore safer.
 
CPJS said:
As a shorty the bars as std were too far away, I had to ride with my arm almost straight which means having to push the bars from the shoulder. This is not good for relaxed and loose riding position. I fitted the Rox adjustable 50mm risers, this brings the bars back about 45mm then I rotated the bars down so the hand grips are about the same height as std. I can now ride with a more upright posture with a bend at the elbow, this gives so much more control and comfort, and therefore safer.
Click to expand...

I must be an orangutan as i rotate mine forward , but maybe from racing 125 2 strokes makes me more forward rather than the cultivator position . To up rite for me makes my back ache and find the forward position better and places my weight better .
 
Ultimately it's when the pressure you apply to the bars is being exerted at 90 degrees to the line up through the steering stem. You gotta have bend in your arms to steer effectively too. If you don't you're having to push by moving your body, not your arms. An ex-Rapid guy drummed that into me.
 
ChazzyB said:
Ultimately it's when the pressure you apply to the bars is being exerted at 90 degrees to the line up through the steering stem. You gotta have bend in your arms to steer effectively too.
Click to expand...

As well a factoring in body position , body size etc .
Also what you feel is comfortable and suits the way you ride . A set equation may not suit all as its theory . Just saying 👍👍
 
Get back to yer Twix bars you ...... :D
 
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In passing, how’s the letter to the Ombudsman coming along?
 
Wapping said:
<iframe width="560" height="315" src="https://www.youtube.com/embed/fVq4_HhBK8Y" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

In passing, how’s the letter to the Ombudsman coming along?
Click to expand...
Ha ha have a nice day
 
Nippy Normans supply Touratech, Wunderlich, Desert Fox and many other makes of accessories.
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