2025 POSST Oberon Rohloff 56

Build

650B/27.5 in × 50 mm

Insights

Somewhat upright stack and reach vs trend of touring bikes

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
630mm
Reach
380mm
Stack to Reach Ratio
1.66:1
Seat Tube Length, C-T
545mm
Top Tube Length, Effective/Horizontal HT Top
567mm
Top Tube Slope
11.4deg
Head Tube Angle
69.5deg
Seat Tube Angle
73.5deg
Head Tube Length
205mm
Bottom Bracket Drop
65mm
Bottom Bracket Height
277mm
Chainstay Length
453mm
Chainstay Length Horizontal
448.3mm
Front-Center
648mm
Front-Center Horizontal
644.7mm
Wheelbase
1093mm
Fork Offset/Rake
50mm
Fork Length (Axle-To-Crown)
407mm
Trail
74.5mm
high
Mechanical Trail
69.8mm
Wheel Flop
24.4mm
Standover Height
806mm
Tire to Pedal Spindle Distance
With 170 mm cranks
136mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
107mm

Rohloff Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
50mm
Tire Outer Diameter
684mm
Bike Length with Tires
1777mm
Crank Length
170mm
Handlebar Width
460mm
Stem Length
100mm
Stem Angle
8deg
Suspension Type
Rigid, non-suspension corrected
Bar Type
Drop Bar
Frame Material
Steel
Fork Material
Steel
Brake Type
Disc
Source:https://www.posst.bike/oberon