2026 Salsa Cycles Blackthorn 125 C (High Position)

	Small	Medium	Large	X-Large
Stack	605mm	614mm	623mm	632mm
Reach	462mm	482mm	502mm	521mm
Stack to Reach Ratio	1.31:1	1.27:1	1.24:1	1.21:1
Seat Tube Length, C-T	405mm	430mm	455mm	480mm
Top Tube Length, Effective/Horizontal HT Top	587mm	609mm	631mm	653mm
Head Tube Angle	64.7deg	64.7deg	64.7deg	64.7deg
Effective Seat Tube Angle, Unknown	78.3deg	78.3deg	78.3deg	78.2deg
Head Tube Length	100mm	110mm	120mm	130mm
Bottom Bracket Drop	32mm	31mm	31mm	31mm
Bottom Bracket Height	340mm	341mm	341mm	341mm
Chainstay Length	432mm	432mm	432mm	432mm
Chainstay Length Horizontal	430.8mm	430.9mm	430.9mm	430.9mm
Front-Center	780.8mm	805.7mm	829.7mm	852.7mm
Front-Center Horizontal	780.2mm	805.1mm	829.1mm	852.1mm
Wheelbase	1211mm	1236mm	1260mm	1283mm
Fork Offset/Rake	43mm	43mm	43mm	43mm
Fork Length (Axle-To-Crown)	571mm	571mm	571mm	571mm
Trail	128.3mm very high	128.3mm very high	128.3mm very high	128.3mm very high
Mechanical Trail	116mm	116mm	116mm	116mm
Wheel Flop	49.6mm	49.6mm	49.6mm	49.6mm
Standover Height	736mm	736mm	737mm	737mm
Tire to Pedal Spindle	243.9mm 165 mm cranks	268.8mm 165 mm cranks	287.7mm 170 mm cranks	310.7mm 170 mm cranks
Pedal Spindle to Ground Clearance	175mm 165 mm cranks	176mm 165 mm cranks	171mm 170 mm cranks	171mm 170 mm cranks

Very Upright

Somewhat Upright

Average

Somewhat Aggressive

Very Aggressive

The Bike Insights Upright/Aggressive scale is based on analysis of a bike’s proportions relative to similar sized bikes in the same category.

Category Trend

Source:https://www.salsacycles.com/products/2025-blackthorn-125-c-gx-transmission

Geometry