Geo is different to roller but i looked at these from Condor. Steel forks for discs and 1 1/8" are quite rare. Look into actual Surly options or carbon CX forks.
I used a Dolan carbon winter fork on mine, no disc tabs, sharpened up steering dropped a load of weight, but max tyre was 28mm and avoid mud. Swapping back to stock can't say i noticed much, low speed handling was more stable maybe slower. Unless your activley riding muddy trails or offroading then stock set up is fine. Carbon CX or custom fork in steel which won't be cheap are what i came down too, or Straggler or Long Haul trucker have cropped up as choices with compromise. Or stay with rim brake.
What is frustrating is these are all complicated solutions to something that could be solved by Surly simply making a Steamroller fork with a disc tab! I really want to roll with a disc brake.
Geo is different to roller but i looked at these from Condor. Steel forks for discs and 1 1/8" are quite rare. Look into actual Surly options or carbon CX forks.
https://www.condorcycles.com/collections/forks/products/tange-prestige-steel-disc-fork
And the Surly roller fork.
https://surlybikes.com/parts/steamroller_fork
I used a Dolan carbon winter fork on mine, no disc tabs, sharpened up steering dropped a load of weight, but max tyre was 28mm and avoid mud. Swapping back to stock can't say i noticed much, low speed handling was more stable maybe slower. Unless your activley riding muddy trails or offroading then stock set up is fine. Carbon CX or custom fork in steel which won't be cheap are what i came down too, or Straggler or Long Haul trucker have cropped up as choices with compromise. Or stay with rim brake.