Kona Thumb w/Offset 27.2mm / Length 48-50 325mm / 52 350mm / 54-58 375mm
Wheels & tires
Hubs
(F) Formula 12x100mm 6B / (R) Formula 12x142mm 6B HG
Rims
WTB ST I23 TCS 2.0
Spokes
Stainless 2.0mm Black
Front tire
WTB Vulpine TCS Light 700x45c
Rear tire
WTB Vulpine TCS Light 700x45c
Geometry · 48
Seat tube
440 mm
Top tube
527 mm
Head tube
109 mm
Head-tube angle
70.5°
Seat-tube angle
75°
Chainstay / rear center
435 mm
Wheelbase
1030 mm
Bottom-bracket drop
75 mm
Bottom-bracket height
285 mm
Reach
380 mm
Stack
550 mm
Standover height
733 mm
Fork offset / rake
50 mm
Front center
606 mm
Fork length / axle-to-crown
410 mm
Geometry · 50
Seat tube
460 mm
Top tube
542 mm
Head tube
125 mm
Head-tube angle
70.5°
Seat-tube angle
74.5°
Chainstay / rear center
435 mm
Wheelbase
1040 mm
Bottom-bracket drop
75 mm
Bottom-bracket height
285 mm
Reach
385 mm
Stack
565 mm
Standover height
752 mm
Fork offset / rake
50 mm
Front center
616 mm
Fork length / axle-to-crown
410 mm
Geometry · 52
Seat tube
480 mm
Top tube
556 mm
Head tube
140 mm
Head-tube angle
70.5°
Seat-tube angle
74°
Chainstay / rear center
435 mm
Wheelbase
1050 mm
Bottom-bracket drop
75 mm
Bottom-bracket height
285 mm
Reach
390 mm
Stack
580 mm
Standover height
770 mm
Fork offset / rake
50 mm
Front center
626 mm
Fork length / axle-to-crown
410 mm
Geometry · 54
Seat tube
510 mm
Top tube
573 mm
Head tube
165 mm
Head-tube angle
70.5°
Seat-tube angle
73.5°
Chainstay / rear center
435 mm
Wheelbase
1064 mm
Bottom-bracket drop
72 mm
Bottom-bracket height
288 mm
Reach
395 mm
Stack
600 mm
Standover height
799 mm
Fork offset / rake
50 mm
Front center
639 mm
Fork length / axle-to-crown
410 mm
Geometry · 56
Seat tube
540 mm
Top tube
590 mm
Head tube
186 mm
Head-tube angle
70.5°
Seat-tube angle
73°
Chainstay / rear center
435 mm
Wheelbase
1076 mm
Bottom-bracket drop
72 mm
Bottom-bracket height
288 mm
Reach
400 mm
Stack
620 mm
Standover height
825 mm
Fork offset / rake
50 mm
Front center
651 mm
Fork length / axle-to-crown
410 mm
Geometry · 58
Seat tube
570 mm
Top tube
610 mm
Head tube
218 mm
Head-tube angle
70.5°
Seat-tube angle
72.5°
Chainstay / rear center
435 mm
Wheelbase
1092 mm
Bottom-bracket drop
72 mm
Bottom-bracket height
288 mm
Reach
405 mm
Stack
650 mm
Standover height
855 mm
Fork offset / rake
50 mm
Front center
667 mm
Fork length / axle-to-crown
410 mm
Manufacturer-published archive data. Confirm exact standards and dimensions before ordering parts or performing service. Generated by Velopedia on September 13, 2026.