The lower headset acts as a reducer for this straight fork.
Tapered fork to non tapered frame headset.
You can t use a tapered fork on a normal 11 8 frame as the tapered fork is fatter than that.
It will add about 10mm to the axle to crown height as well.
Quite a few brands make them now too.
1 offer from 391 32.
But you can use a non tapered fork on a tapered frame with the correct headset.
Rockshox recon silver rl d1 suspension fork 29 air 100mm 1 1 8 qr rake.
Rockshox recon silver tk black 26 inch 4 6 out of 5 stars 49.
Only 1 left in stock order soon.
The frame was made to accept a tapered fork but this particular headset choice allows the use of the common 28 6mm column straight fork 1 1 8 fork.
You can t use a tapered fork on a normal 11 8 frame as the tapered fork is fatter than that.
Cane creek hope and token off the top of my head.
As long as your headtube is 44mm it will replace the lower internal headset cup with an external cup to suit the tapered steerer.
But you can use a non tapered fork on a tapered frame with the correct headset.
Daz you can lead a horse to water but a pencil must be lead.