Used in conjunction with stem and handlebar measurements, it can tell you roughly how far away your hands will be from your feet when riding the bike. A shorter reach produces a smaller cockpit, while a longer reach gives a more roomy feel. The actual distance between hands and feet when riding can be fine-tuned with the stem, headset spacers, handlebar, and handlebar position. Reach can often help to determine what length stem to run on a certain frame to accommodate a rider's height.
The axle to crown length of the fork, as you might guess, is the distance between the axle center of the dropouts and the crown where the bottom race of the headset rests. A fork with a longer axle to crown measurement will bring the front end of the bike up, while a shorter fork will give the bike a less upright position. Currently, most 24" frames are designed around the geometry of a 26" fork, so while you may see something described as a 24" fork, the only difference between that and a 26" fork is where the vee or 4-bolt mounts are placed to line up with the rim.
The axle to crown measurements are the same. Fork offset is the distance from the axle to a straight line drawn from the steerer tube. Most trials forks have mm of offset, meaning they bend somehow so that the axle is ahead of the steerer tube.
A fork with more offset will lengthen the wheelbase of the bike, while a fork with less offset will shorten the wheelbase. Despite their appearances, straight blade and curved blade trials forks usually have similar offsets.
This is because straight blade forks have the legs welded on at an angle, while curved blade forks have the legs welded on in a straight line with the steerer. Steerer length is the length of the steerer tube from the top to the crown where the bottom race of the headset rests.
Steerer lengths usually range from mm to mm. This measurement can be important to know if you have a stem with a lot of stack height or a frame with a long head tube.
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New CNC brake mount with larger surface of contact with the forks arms, offers great rigidity. Specials Shirt Jitsie Airtime Black-fluo green Rock fork 4bolts 26" - v4 New: 4th edition of the trials fork from Rock, for rim brakes. Notify me when available. Add to cart Add to my wishlist. More Info. Rockman logo engraved on the steerer tube.
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