I know you get headset questions all the time, hopefully this one mixes things up a bit. I recently acquired a 2015 litespeed CX frame, which has a 44 mm head tube. It is listed as having a height of 12 cm. I picked up a fork, from a Cannondale Synapse 2018, size 58.
To my great surprise, the fork is listed as having a 1 1/8" to 1 3/8" tapered steerer. The headset on the Synapse is listed as a "Synapse Si". Most sites I have found are about trying to fit an alternate fork into a Cannondale headtube, as opposed to the other way around. I have found the following webpages: https://www.cannondaleanswers.com/definitive-guide-cannondale-frame-headset-fork-compatibility-for-mountain-bikes/ https://cannondaleexperts.com/products/cannondale-synapse-carbon-1-3-8-tapered-headset-no-crown-race-k35038?variant=31365859639433
Is there any way to get this fork onto my 44 mm headtube? Thank you!