How are Harley fork tubes measured?

How are Harley fork tubes measured?

Fork lengths measured in inches from the bottom of the lower fork bearing cup (or a point parallel to it on the fork tube) to the center of the axle hole. With this list, you can determine the length of a set of tubes, a springer, a girder, or whatever, you need.

What is stock length for Harley front ends?

Measurement is from “The top of the bottom tree to the center of the axle”, and their “stock” front end is 23″.

What causes wheel flop?

When you turn a bicycle’s fork, the front of the bicycle lowers. This is called wheel flop, and it is caused by the inclination of the steerer axis and the offset of the front wheel from that axis. Gravity pulls the front of the bike downward, and to get lower, it has to push the fork into a rotating motion.

Does fork offset really matter?

Fork offset definitely matters! As fork offset decreases, your bike’s “trail” measurement increases, and vice versa. Overall, mountain bike geometries have gotten longer and slacker, which in turn provides increased rider stability, especially in steep and technical terrain.

What is a fork offset?

Fork offset is the distance between the front axle and the steering axis of the fork. 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.

Does fork offset make a difference?

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.

How important is fork offset?

Simply put, fork offset, or fork rake, is the distance between the front axle and the steering axis – the imaginary line running straight through the midpoint of the steerer tube. Fork offset is linked to another important measurement: trail. Higher trail means greater stability and lazier, slower steering.

How is fork offset calculated?

Measure the height of the fork dropout off the top of the flat surface (Dim A). Measure the height of the center of the steerer tube off the top of the flat surface (Dim B). Subtracting Dim B from Dim A will result in the fork offset or rake.

How much does Fork travel affect head angle?

Bumping the fork travel up by 20mm, to 150mm, will slacken the head angle by approximately 1° and increase the front centre measurement by 10mm.

Should I be using all my fork travel?

If you’re riding fairly mild terrain, it’s normal to not use all of your travel. You could soften up the fork to use more travel, but you might find that it’s too soft.

Is 100mm fork travel enough?

For basic trail riding I would recommend something closer to 120mm as most 100mm bikes are xc race bikes and likely won’t be as fun on most trails. If you want to do any drops or impacts then 100mm isn’t enough. You’ll bottom out every time.