How does fork offset affect trail?
Both the headtube angle and fork offset can change the length of the trail number. By making the head tube angle slacker (decreasing the angle) you will make the trail longer. By reducing the fork offset, you will also make the trail longer. Below is a picture that should help put these definitions into use.
What does increasing fork offset do?
Offsetting the fork more (increasing offset) pushes the axle further in front of the head angle. By reducing the fork rake (offset), the head angle remains the same for stability at high speed and down steep and rough trails, but the wheel is closer to the steering axis for better handling, especially at slower speeds.
How does offset affect trail?
The bigger the offset the shorter the trail figure. And vice versa, the shorter the offset the larger the trail figure. Wheelsize affects trail too. The higher the axle, the more trail there’ll be.
Does fork offset affect wheelbase?
A common one is the thought that a reduced offset fork will pull your front wheel towards you, significantly reducing the wheelbase length. In actuality, the change is negligible. In the case of a 29’er with a 65 degree head angle, going from a 51mm to a 44mm offset fork will reduce your wheelbase length by 5.78mm.
What is a 51mm offset fork?
This offset is measured in millimeters. Its purpose is to adjust the amount of ‘trail’ in the steering geometry. For 29″ bikes, the 51mm offset fork has been the standard for nearly a decade.
Is fork offset the same as rake?
Fork Rake is also known as Offset, which more accurately describes what it is: the hub’s offset from the steering axis. Fork offset determines trail when considered with head angle (and the diameter of the wheel). Trail is best thought of as the tire patch “trailing” behind the steering axis.
What offset fork BMX?
BMX Fork Offset. The Offset of the Fork is the distance from the center of the fork leg to the beginning of the axle slot in the drop out. This effects stability, steering, & front wheel tricks noticeably. The shorter the offset, the easier it will be to initiate front wheel tricks like nose manuals or footjams.
Is 51mm offset good?
Increasing or decreasing trail too much makes a bike difficult to control. For mountain bikes, the sweet spot that provides a good balance between stability and agility is around 80-100mm of trail. Many mid-travel bikes settle near 90mm with a 51mm offset fork.
Whats the difference between 44 and 51 offset?
44mm vs 51mm Offset Mechanical trail has a similar difference. 44mm offset has 108.7mm while the 51mm offset comes in at 101.7mm. This means that the 44mm offset will have a bit more stable platform. If we wanted to design the same amount of trail into the 51mm offset fork we would need to decrease the headtube angle.
How much difference does fork offset make?
Increasing fork offset reduces trail. Larger wheels increase trail. With a larger wheel (e.g., a 29” wheel) the axle is higher off the ground compared to a smaller wheel. If you draw a line through the steering axis to the ground, it intersects the ground farther forward of the axle, increasing trail.