How do you select a bike frame in geometry?
Compare the bottom bracket height, wheelbase, and the relationship between the front centre and the chainstays with a bike you know you like. If those are similar, then head angle, fork rake and trail are similar, you will know it will be a similar feeling bike.
What is the most comfortable bike geometry?
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.
How is bike reach calculated?
Reach measurement. First measure distance of the head tube top middle from a wall behind (or in front) of the bicycle, then the bottom bracket distance from the same wall. Subtract larger from the smaller measurement and that gives the reach.
What is geometry on a bike?
Bike geometry is responsible for how a bike looks, rides, and handles, and having a basic grasp of the key figures will go a long to way aiding you in comparing different bikes and what is best for you.
How do you calculate stack and reach?
This is pretty easy. Just get your bike upright, on a level surface. Measure the ground to the top of the headtube, then measure the ground to BB center. Subtract the BB height from the HT height and that is your stack.
Does 1 degree head angle make a difference?
TBH 1 degree dont make a difference. It feels the same, unless you change your stem and handlebar and then your bike will feel a bit more of a difference.
What is stack reach ratio?
Stack to Reach Ratio is a metric that tries to answer the question “How upright or aggressive is this bike design?”.
What is BB drop?
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 ST and TT in bike?
Time Trial Bike Sizing Guide Time Trial (TT) and Triathlon bikes are designed for speed. That’s why they have an aero design, TT bars, aero wheels and a low front end. It’s more important than ever to get the right size TT bike so that you’re in the most aerodynamic riding position.
What does a steeper head angle do?
A steeper head angle makes the bike much more responsive at lower speeds and can help the rider maneuver the bike through slower, tighter, and more technical terrain.
Is stack or reach more important?
For a given reach, a greater stack puts you into a more upright riding position; your hands will be moved upwards and your body position will rise more towards the vertical.
What is the best head angle?
The steeper the head tube angle, the better handling you’ll achieve, but with less stability at speed. Most trail bikes have settled on a minute range of somewhere between 65 and 67 degrees. Downhill bikes will have angles anywhere from 62 to 64.
How much difference does head angle make?
With a 63-degree head angle, turning the bars by 10 degrees will steer the contact patch by 8.9 degrees about the vertical axis; with a 70-degree head angle, the contact patch will steer by 9.4 degrees. In other words, the steeper the head angle, the faster the steering response.
What is more important stack or reach?
What is slack MTB geometry?
Head Tube Length & Angle 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.
Are TT bikes faster?
That’s six minutes faster than my best ever performance. However, Pringle points out that we don’t ride at an ‘average’ speed….Watch: how much faster is a time trial bike, really?
|Bike/position||Watt saving vs baseline|
|AIR road bike, clip on bars, optimised*, at 40kph||83|
|TTE time trial bike, to travel 40kph, at 40kph||86|
What is a bike geometry chart?
A bike geometry chart is a table, usually accompanied by a diagram of a bicycle frame for reference, of the key measurements of a particular model in a manufacturer’s range.
How does the geometry of a bike change with weight?
The geometry of any bike with suspension will change due to the static weight of the rider. Definition: The shape of the bike when settled into its suspension travel under stationary rider weight.
What are the most important variables in a bike’s fit?
The exact information contained in those tables varies a little between brands but they all give you tube lengths, frame angles, wheelbase, chainstay length, stack and reach. Here’s what the most important variables mean and how they influence the bike’s fit and feel.
How many bike geometries are there in the database?
Welcome to the world’s biggest open database of bike geometry. If your bike isn’t listed yet, you can add it! Please email us if you need help, or have a suggestion about how to make the site better. (Other users see an ad here.) Check out what the site can do with… There are 53,985 geometries in the database.