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30 votes

Bike unstable (difficult to ride without hands on bars) after changing fork after collision

Bicycle dynamics A bicycle may only be ridden because of the peculiar steering geometry. The centre of the contact patch of the tyre is behind the point where the steering axis intersects with the ...
gschenk's user avatar
  • 9,778
17 votes
Accepted

How does fork offset affect bike handling?

Offset primarily affects your mechanical trail - that is, the distance between the imaginary straight line going through your head tube down to the ground, and your tire’s contact patch. Normally, the ...
MaplePanda's user avatar
  • 15.9k
10 votes

Aero wheel on front, regular on back - why?

I think this is being over-thought. Aerowheels on messenger rigs have nothing to do with performance, quicker locking ability etc. etc. It’s just the new generation mimicking the older generation, ...
user37674's user avatar
  • 101
9 votes

Drop bar maneuverability in a gravel bike

The question relatively hard to answer because there are a lot of subjective elements, and the kind of trail you are riding is also not known. The range of "drop bar" bikes is also wide: ...
Rеnаud's user avatar
  • 21k
8 votes
Accepted

BB drop vs BB height from stability perspective

The conventional wisdom is you get more stability the closer you can get the center of mass to the contact patch. There are many other factors that could play a role in this than just the ones related ...
Nathan Knutson's user avatar
8 votes
Accepted

Steering dampers

As you have found out there only seems to be one true steering damper currently on the market, and it's a speciality product for downhill MTB racing or dealing with cross winds on time trial bikes. ...
Argenti Apparatus's user avatar
6 votes
Accepted

Aero wheel on front, regular on back - why?

As stated in the other answer, the driving force behind these setups used to budget. The rear wheel is fixed gear, which limits the budget selection to old track wheels, converted freewheel wheels and ...
ojs's user avatar
  • 22.2k
6 votes

Aero wheel on front, regular on back - why?

Is there a bike co-op in your city? When I ran around on a ratbike like that, it was because I just got whatever people had laying around and stuck it together as cheaply as possible, usually with no ...
Kevin's user avatar
  • 467
6 votes

Drop bar maneuverability in a gravel bike

As a point of comparison, I've taken my tourer (drop bars, 35mm slick tyres, very long wheelbase) round some of the local blue trail and had no trouble at all. But the climbs on that aren't technical,...
Chris H's user avatar
  • 60.3k
5 votes

BB drop vs BB height from stability perspective

The dimension I always see on spec sheets is BB drop, which isn't dependent on tire size. Greater BB drop = lower bottom bracket = more stability
Adam Rice's user avatar
  • 30.1k
5 votes

Steering dampers

(This answers the original question that was only about usefulness of steering dampers without details) The purpose of steering damper on motorcycles is to prevent steering oscillation, also known as ...
ojs's user avatar
  • 22.2k
5 votes
Accepted

Drop bar maneuverability in a gravel bike

As others already answered, the answer to "are drop bars more difficult for off-road riding" is pretty unequivocally yes. This shouldn't really be surprising. But I would qualify it. Drop ...
leftaroundabout's user avatar
4 votes

Aero wheel on front, regular on back - why?

From an aerodynamic perspective the biggest aero gains come from the front wheel set-up as it is the leading edge breaking the clean air. The rear wheel runs in the "dirty" air so aerodynamics gains ...
Rider_X's user avatar
  • 30.7k
4 votes

Counter-intuitive steering in crosswinds with hands off the bars

If the wind is from the left, you need to lean to the left to stop the wind blowing you over to the right; leaning left makes you turn left.
David Richerby's user avatar
4 votes

BB drop vs BB height from stability perspective

As others have stated, both numbers express how low the rider's/bike's center of gravity is, so they both relate to stability. Bottom bracket height inherently will vary with tire size. To provide BB ...
Weiwen Ng's user avatar
  • 32.9k
3 votes

Drop bar maneuverability in a gravel bike

The theoretical reason I have heard for wide, flat MTB bars is that in MTB terrain, your front wheel can get knocked off course by a hit on a rock, for example. Wide bars give you leverage against ...
Weiwen Ng's user avatar
  • 32.9k
3 votes

handling and steering difference for stem/bar reach combinations?

The exact difference can't be easily quantified in terms of how short is too short. The closer in you get, the more amplified an effect your steering inputs will have, creating a feeling of touchiness....
Nathan Knutson's user avatar
3 votes

Do skilled cyclists really "use the front brake alone probably 95% of the time"?

One of the less-common situations where front wheel braking can be worse than rear wheel braking is when slowing with a loaded trailer. I have personally jack-knifed a bike when stopping for a red ...
Criggie's user avatar
  • 127k
3 votes

Anyone have Open Bars or similar on a Surly Cross Check or Straggler?

I spent some time on a century ride with a guy who had porteur bars on his cross check. They certainly did not seem to slow him down or make him uncomfortable. The Cross Check (full disclosure I do ...
dafew's user avatar
  • 1,426
3 votes

Descending with deep section front wheels

I believe the depth of your rim would not have much direct impact on the amount of stability on descent. Most stability is going to come from body position, hand placement on your handlebars and the ...
Calvin Smythe's user avatar
3 votes

Drop bar maneuverability in a gravel bike

If we narrow it down to the basic question will I likely find a drop bar more difficult to handle in such scenarios? ... I would say, the simple answer is YES If you just put drop bars on the same ...
DoNuT's user avatar
  • 4,496
2 votes

Descending with deep section front wheels

I'm not sure I understand the question. Hopefully this answers it. I have descended fast, including turns, on box section, 30mm, 45mm and 50mm deep wheels and not found any of them to be unstable ...
Paddy Livingstone's user avatar
2 votes

Front wheel oscillation

Another possibility that's not mentioned in the other answers is that the plastic reflectors that attach to the spokes can be enough to unbalance the wheel. On my road bike, I found that my wheels ...
David Richerby's user avatar
2 votes

Anyone have Open Bars or similar on a Surly Cross Check or Straggler?

It would bring you back pretty far compared to drop bars. You may like it but it would change up the geometry quite a bit. There are some fitness / city bikes that are set up for flat bar. It ...
paparazzo's user avatar
  • 15.7k
2 votes

Steering dampers

The first mention I saw of them, and still the only recommendation, was for use with a baby seat and rear rack (specifically one to carry a folded pushchair at the very back of the bike) combined. ...
Chris H's user avatar
  • 60.3k
2 votes

Steering Dynamics Question

From a naïve geometry point all three options are equivalent. For real systems material properties and 3d geometry become relevant. For instance, your model (A) could not be made with a single piece ...
gschenk's user avatar
  • 9,778
2 votes

What do "capsize", "wobble", and "weave" mean when referring to bike stability?

The animated illustrations in "Vibration modes of motorcycles" by Vittore Cossalter, Roberto Lot (posted in the community wiki answer) do a great job of illustrating capsize, weave, and ...
jmmygoggle's user avatar
2 votes

What do "capsize", "wobble", and "weave" mean when referring to bike stability?

https://moorepants.github.io/dissertation/eom.html?highlight=weave#linearized-equations-of-motion Capsize is always real and stable at low speeds but becomes marginally unstable at a higher speed. It ...
2 votes

What parameters affect how easy it is to ride no hands?

The most important parameter for hands-free riding is the wheelbase (distance between front and rear wheel). A long wheelbase results in good straight-line stability. Easy hands-free driving. A ...
komape's user avatar
  • 403
1 vote

What do "capsize", "wobble", and "weave" mean when referring to bike stability?

When at speed, a bicycle's uncontrolled motion is dominated by three fundamental motion types (caster, capsize, and weave). The actual motion of the bicycle will typically be a sum of these motion ...
moorepants's user avatar

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