Mountain Bike Seat Tube Angle
As covered above we do see more variation between the 29ers than the 27 5 bikes which i found particularly interesting.
Mountain bike seat tube angle. If you ve got a straight seat tube you can measure the seat tube angle by lining up your smartphone and reading the number off the clinometer app. The ideal head tube angle for trail bikes seems to be in the 67 68 degree range and seat tube angles have settled around 74 degrees across the board. Like stack and reach seat tube angle refers solely to the frame. Some bikes have only an effective seat.
Make sure your bike is vertical and standing. Mountain bike geometry explained in 9 numbers. A bike s seat tube angle often called seat angle is simply the angle between the horizontal and a line that starts at the bottom bracket and goes up through the seat tube. However if you cannot attain an efficient body position for pedaling then maybe it plays a role more likely is that the rider is trying to force fit themselves onto a bike.
That 75 seat tube angle that is marketed turns out to an actual angle of closer to 70 relative to the ground once you sit on the bike and then start climbing. The seat tube angle has no effect on climbing by itself. This is the angle of the seat tube relative to the ground.