Geometry Geeks

November 28, 2023 Post a Comment

Geometry geeks

Broadly speaking, road bikes can be grouped into two geometry categories: race and endurance. A race bike will have a more aggressive geometry for improved aerodynamics, while a bike with an endurance geometry (or 'sportive' geometry) will be shaped for comfort, with a more upright riding position.

What MTB geometry do I need?

As a general rule, you can expect trail bikes to have 64-66° head angles, XC bikes too have higher angles, enduro bikes around 63° and downhill rigs in the low 60s. It's worth noting, though, that 29ers tend to have steeper head angles than 27.5in bikes and/or they have forks with different fork offset numbers.

How far should handlebars be from Saddle?

For a performance road position, the top of the handlebar should be about 5-6 cm below the mid-point of the saddle. 4. For a recreational road bike position, the top of the handlebar should be level with the mid-point of the saddle, or maybe a couple of centimetres below.

What is BB drop?

Definition. BB Drop is the vertical distance between the centre of the bottom bracket, and the axles of the front and rear wheels. This is a fixed, static measurement. Once a bike is built up and has no rider on it, this doesn't change.

What is aggressive geometry?

Aggressive geometry usually means low handlebars relative to the seat height, and generally steep head tube and seat tube angles. That usually implies short chainstays, too. The quintessential example of aggressive geometry is a road, track, or time-trial racing bike.

Why is drawing a bike so hard?

Drawing a bicycle is hard because all angles on a bicycle are wrong. They are wrong of course only in the sense, that they are not what we think they are. Not knowing these stubborn little wrong angles is what makes drawing a bike such a nightmare.

Is MTB harder than road cycling?

Based on the factors I was able to test, I found a 51% increase in the effort needed to ride a mountain bike on a grassy, leafy trail with obstacles, compared to a road bike on a paved surface. Remember, that assumes a mountain bike course with grades and turns that are similar to what one would ride on the road.

Is a 68 degree head angle slack?

The head tube angle is the angle of the head tube in relation to the ground. A “slack” angle is anywhere from 63 to 66 degrees. This means the fork of the bike is going to stick out farther, creating a more stable ride at high speeds, but also be slower handling.

Do 29ers climb better?

29ers are better up hills. Bigger wheels are heavier which works against you when climbing, so in this respect it's a myth. However, if the climb is littered with rocks and steps, the bigger wheel will roll over these momentum sapping obstacles with less effort.

What happens if saddle is too far forward?

If your saddle is too far forward, you may be overusing your upper body, resulting in tightness in your shoulders and arms, as well as painful hands. You'll be able to ride with a faster cadence, but you'll find yourself sitting back in the seat on hills.

What happens if saddle is too far back?

A saddle that is excessively too far back alters your hip angle which subsequently places more stress on your hamstrings and butt muscles during the pedal stroke.

Should bike saddle point up or down?

Tilting your saddle nose down by eight degrees is more efficient in seated-uphill efforts, researchers find. If you're a more discerning cyclist, you may be familiar with Rule #48 of the rather particular Velominati list of rules cyclists must abide by that says your saddle must be "visually level"

What is a MTB drop?

Features so drops can come in many different shapes and sizes they can start out as small as these

What is seat tube CT?

Seat Tube Top (C-T): The “actual” length of the seat tube up to its very top. This is the most common seat tube measurement on modern bikes. Top Tube Top (C-TTT): The length of the seat tube measured to the junction of the seat tube and the top of the top tube. This measurement is rarely used.

How has MTB changed geometry?

When I got started, 26-inch wheels were the only option for mountain biking. Bike designers have since adapted bike frame geometry to the larger 29-inch diameter that means wheels roll more smoothly over gaps and over rocks. With the larger wheels, a bigger patch of rubber contacts the ground for better traction, too.

What is slacker geometry?

A “slack” geometry means that these angles are lower, which in effect moves the rider further back in relation to the center of the bike and the front wheel is further out in front. At the extreme end of this design concept is the downhill bike.

Does bike geometry affect speed?

The short answer is that 'it depends'. Some viewers commented that maybe it just doesn't matter. It absolutely does matter and indeed the geometry of the bike is the most powerful way that we can change the riders experience of the bike.

What is relaxed bike geometry?

Relaxed geometry has you sitting in a more upright position and the bike is setup to feel more stable at speed.

What is the hardest bike trick ever?

1. No Footer. The 'no footer' trick has to be the oldest and most known BMX bike trick, yet it continues to be the hardest and most challenging one as well.

How can I improve my drawing speed?

Speed comes by practicing drawing with shapes, recognizing spacial relationships, drawing with a larger muscle group, using the right medium, and omitting unnecessary details. So start improving your drawing speed (and accuracy) by drawing as many different things using these concepts.