![]() If you measure your stem angle in terms of deviation from 90° (for example, I see stem angles quoted as ☖°) then your value of t is given by 17☖. Just subtract 73 from your stem angle to get t. So if you have an 83° stem, you'd subtract 73 from 83 to get 10, which is your value of t. cos(t) and the vertical reach is given by r.If t is used to represent the angle that the stem makes with the horizontal and r represents the extension of the stem, then the forward reach is given by r ![]() That's because the head tube angle is right around 73° (73+17 = 90). A stem that makes a 90° angle with the steerer tube (also called a 0° stem) actually rises at about 17° from the horizontal. ![]()
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