I'm looking to replace the suspension fork on my bike with a rigid one. After much soul searching I've tentatively settled on the Surly 1x1. What's got me wrapped around the axle (pun intended!) is the axle-to-crown measurement.
The fork I have now is the SR Suntour SF13-XCT, which came stock on my Specialized mountain bike. This fork is listed as having 80mm of travel and a 459mm total length. When measuring the distance between this fork's axle & crown I've gotten very close to the 459mm listed on Suntour's site, which leads me to believe that the 459mm length listed by Suntour is correct.
The Surly 1x1 I'm looking at has two versions: one "corrected" for suspension travel of 80mm (axle-to-crown length of 413mm), the other "corrected" for suspension travel of 100mm (axle-to-crown length of 453mm).
Both of the Surly A-to-C measurements are below the 459mm that I supposedly have to put in if my geometry & handling are to stay the same.
In addition, the zip tie method allowed me to measure my sag as 18mm. (I normally keep my fork on its highest preload setting.)
Now, for the question itself: Which of the two Surly 1x1's should I get? Should I, or should I not, take my sag into account, considering that Surly's forks appear to have been "corrected" for suspension travel already?
Thanks in advance for any guidance.