Bike Head Tube Sizes

This can seem confusing because the head cups do not measure the named standard.

Bike head tube sizes. So a 29 inch mtb tube will have the same diameter as a 700c road wheel while a 27 5 inch tube will be the same diameter as a 650b road wheel. This was especially challenging on 29ers where riders demanded shorter head tubes. Finding the right inner tube depends on the size of the tires on your bike. The headset is the set of components on a bicycle that provides a rotatable interface between the bicycle fork and the head tube of a bicycle frame the tube through which the steerer of the fork passes is called the head tube a typical headset consists of two cups that are pressed into the top and bottom of the headtube.

Head tube angle fork rake or offset fork trail. The head tube of a bicycle is sometimes designated by the fork steerer column it accepts. For example frames that take one inch 25 4 mm steerer columns can have. While you can find a variety of bikes with wheel sizes ranging from 16 to 27 5 inches the most common sizes include 26 inches 27 5 inches 29 inches and 700c.

But let s start with the head tube angle. The various standards are generally not interchangeable. 7 8 obsolete british size for steel handlebars common on older 3 speeds. The threaded standards are 1 inch 1 1 8 inch and 1 1 4 inch headsets.

The headtube angle is the angle at which the head tube is to the ground. Head tubes can use one of several size standards bicycles. Out of the three fork trail arguably tells us the most about how a bicycle will steer. Some bikes like the niner air 9 carbon which has a 100mm tall headtube were simply incompatible with rockshox.

Traditionally these have been held in pressed cups but modern bikes also see bearings fitted directly into the frame. Threaded headset sizes are designated by the outer diameter of the steering column. This can lead to confusion since head tube inside diameters are dependent on the headset standard. Stem clamp size grip area size application.

A bike with a steeper head angle has faster steering. The two bearings at either end of the head tube are what make things work. Mainly bmx older mountain bike bars.