Surly Preamble, 100% Chromoly steel fork, Disc Only
Fork material
Steel
Geometry · X-Small
Seat tube
410 mm
Effective top tube
500 mm
Head tube
120 mm
Head-tube angle
70°
Seat-tube angle
74°
Chainstay / rear center
420 mm
Wheelbase
987 mm
Bottom-bracket drop
54 mm
Reach
352 mm
Stack
517 mm
Standover height
722 mm
Fork offset / rake
47 mm
Fork length / axle-to-crown
380 mm
Geometry · Small
Seat tube
505 mm
Effective top tube
545 mm
Head tube
135 mm
Head-tube angle
71°
Seat-tube angle
73°
Chainstay / rear center
420 mm
Wheelbase
1013 mm
Bottom-bracket drop
54 mm
Reach
381 mm
Stack
535 mm
Standover height
776 mm
Fork offset / rake
47 mm
Fork length / axle-to-crown
380 mm
Geometry · Medium
Seat tube
565 mm
Effective top tube
570 mm
Head tube
130 mm
Head-tube angle
72°
Seat-tube angle
72.5°
Chainstay / rear center
435 mm
Wheelbase
1030 mm
Bottom-bracket drop
66 mm
Reach
391 mm
Stack
567 mm
Standover height
826 mm
Fork offset / rake
44 mm
Fork length / axle-to-crown
400 mm
Geometry · Large
Seat tube
605 mm
Effective top tube
600 mm
Head tube
170 mm
Head-tube angle
72°
Seat-tube angle
72°
Chainstay / rear center
435 mm
Wheelbase
1055 mm
Bottom-bracket drop
66 mm
Reach
404 mm
Stack
605 mm
Standover height
863 mm
Fork offset / rake
44 mm
Fork length / axle-to-crown
400 mm
Geometry · X-Large
Seat tube
645 mm
Effective top tube
630 mm
Head tube
210 mm
Head-tube angle
72°
Seat-tube angle
72°
Chainstay / rear center
435 mm
Wheelbase
1085 mm
Bottom-bracket drop
66 mm
Reach
421 mm
Stack
643 mm
Standover height
901 mm
Fork offset / rake
44 mm
Fork length / axle-to-crown
400 mm
Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on October 7, 2026.