This is the angle of the seat tube relative to the ground. Mountain bike geometry is a list of specifications that describes some of the most important angles and lengths on a bike.
Mountain bike geometry explained in 9 numbers.
Mountain bike geometry. There s a maths to it. Way back in the 80s mtb geometry was heavily based on road bikes. A trail bike between 66 and 68 and an enduro bike between 65 and 67 degree head tube angle.
Mountain bike geometry will often feature a seat tube angle around 73 degrees with a head tube angle of anywhere from 60 73 degrees. In some ways it remains quite contemporary image credit. There are 44317 geometries in the database.
That s 9895 bikes from 910 brands and growing daily. Mountain bike geometry and trying to separate fact from fashion. National museum of american history geometry.
This means sitting down and understanding bike geometry. Find a local bike fitter and get. The average mountain biker shouldn t be bothered by most of the measurements on a geometry table but some are absolutely critical to performance and can vary greatly between bikes.
Tt and tri bikes. The intended application of the bike affects its geometry very heavily. Mountain bikes have a more diverse range of angles and they usually correspond with the bike s suspension travel.
A bike s angles and dimensions are the key to the way it rides. As the name suggests actual seat angle refers to the lay back of the seat post but on modern suspension bikes this is complicated by the seat tube starting forward of the bottom bracket to accomodate shocks and give rear. A short travel cross country race bike might be between 67 and 69 degrees.
So if a bike had a 22 inch seat tube it was a pretty safe bet the top tube was similar in length. The geometry of your mountain bike dicates how it handles and how it positions you on the bike. We also have the world s largest database of fitters.
I was so terrifically awful at maths that my answers during high school exams were mostly clueless. Understanding it will make you a better rider. Frames were more or less square with the top tube parallel to the ground and the top tube a similar length to the seat tube.
You and your bike need to work effortlessly together to ensure powerful and skilful riding from start to finish. Geometry in mountain bikes started with this breezer back in 1977. Mountain biking isn t as easy as hopping on the first bike you find and heading off the beaten track.
In general steeper angles closer to 90 degrees from the horizontal are more efficient for pedaling up hills and make for sharper handling. Understanding how they interact will help you choose the right machine and unlock its potential.
Gallery of Mountain Bike Geometry
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