Originally Posted by
SurlyLaika
Red
Reach: 90
Angle: 0
Spacers: 35(mm)
Blue
Reach: 90
Angle: 35
Spacers: 35
Steer Angle: 72
Results:
blue stem has 31mm less reach and is 44mm higher.
steerer: 72
red stem: 90mm reach, 0 degrees, 35mm of spacers
blue stem: 90mm reach, 35 degrees, 35mm of spacers
Did I do it, right?! But wouldn't this be comparing the 90mm adjustable riser stem with an angle of 0 degrees with the raised height of 35 degrees? What if I want to compare the blue stem [current configuration] with the the red stem of the stock configuration with a 100mm stem and I'm not sure what angle.
Then, I want take the length of the stems and add it to the eTT lengths of both the 56 and the 54cm Cross Checks. Help me out, dude. I gave that website a shot.
The tool assumes it's on the same frame. If you want to compare two totally different bikes, then put in the two stems in the tool. You'll have to adjust the spacer height to account for the different length head tubes. For example, if the "blue" bike has a 10mm taller head tube, then give it 10mm more spacers to account for the taller head tube.
Compare the difference in reach that the tool determines to the difference in the effective top tubes of each bike.
For example, if the "blue" stem is 10mm shorter than the "red" stem and the "blue" frame eTT is 20mm shorter than "red" frame, then the overall reach of the "blue" bike will be 30mm shorter. This assumes the same or roughly the same seat tube and head tube angles.