2025 POSST Oberon Rohloff

	50	52	54	56	58
Stack	550mm	575mm	600mm	630mm	655mm
Reach	350mm	360mm	367mm	380mm	400mm
Stack to Reach Ratio	1.57:1	1.6:1	1.63:1	1.66:1	1.64:1
Seat Tube Length, C-T	460mm	490mm	520mm	545mm	570mm
Top Tube Length, Effective/Horizontal HT Top	512mm	530mm	545mm	567mm	600mm
Top Tube Slope	12.8deg	11.9deg	11.2deg	11.4deg	11deg
Head Tube Angle	68.5deg	69deg	69.5deg	69.5deg	69.5deg
Seat Tube Angle	73.5deg	73.5deg	73.5deg	73.5deg	73deg
Head Tube Length	127mm	150mm	173mm	205mm	231mm
Bottom Bracket Drop	65mm	65mm	65mm	65mm	65mm
Bottom Bracket Height	277mm	277mm	277mm	277mm	277mm
Chainstay Length	453mm	453mm	453mm	453mm	453mm
Chainstay Length Horizontal	448.3mm	448.3mm	448.3mm	448.3mm	448.3mm
Front-Center	604mm	616mm	624mm	648mm	677mm
Front-Center Horizontal	600.7mm	612.7mm	620.7mm	644.7mm	673.7mm
Wheelbase	1049mm	1061mm	1069mm	1093mm	1122mm
Fork Offset/Rake	55mm	53mm	50mm	50mm	50mm
Fork Length (Axle-To-Crown)	407mm	407mm	407mm	407mm	407mm
Trail	75.6mm high	74.5mm high	74.5mm high	74.5mm high	74.5mm high
Mechanical Trail	70.3mm	69.6mm	69.8mm	69.8mm	69.8mm
Wheel Flop	25.8mm	24.9mm	24.4mm	24.4mm	24.4mm
Standover Height	725mm	752mm	780mm	806mm	830mm
Tire to Pedal Spindle	92mm 170 mm cranks	104mm 170 mm cranks	112mm 170 mm cranks	136mm 170 mm cranks	165mm 170 mm cranks
Pedal Spindle to Ground Clearance	107mm 170 mm cranks	107mm 170 mm cranks	107mm 170 mm cranks	107mm 170 mm cranks	107mm 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.posst.bike/oberon

Geometry