I checked around, found two reasonably priced forks, ran the numbers and here’s what I came up with.
Based on a 1mm lower stack height.
Original geometry: curved bladed fork
74-degree seat angle, 72.5 degree headtube angle, 370 axle-to-crown fork @ 50mm offset = 54mm trail, 70mm BB-drop.
With replacement Bontrager fork: straight bladed fork
73.85 seat angle, 72.35 headtube angle, 371mm axle-to-crown fork @45mm offset = 59.3mm trail, 69mm bb-drop.
With replacement Ritchey Fork: curved bladed fork
74.02 seat angle, 72.52 headtube angle, 368mm axle-to-crown fork @45mm offset = 59.2mm trail, 70.2mm bb-drop.
The questions are:
1. Do the numbers seem correct?
2. Should I ignore the “altered” seat/head tube angles the replacement forks will produce and simply note the new trail values?
3. Does anyone have any experience with Bontrager or Ritchey forks?
4. How does a straight bladed fork’s ride differ from curved?