2019 Berthoud Cycles JM-19 Base 51

Build

650B/27.5 in × 38 mm

Insights

Average stack and reach vs trend of all-road/gravel bikes
Design deviates from other sizes of Berthoud Cycles JM-19

Stack and Reach vs. Category Trend
View all sizes

Geometry

Stack
540mm
Reach
363mm
Stack to Reach Ratio
1.49:1
Seat Tube Length, C-C
510mm
Top Tube Length, Effective/Horizontal Center
530mm
Head Tube Angle
70deg
Seat Tube Angle
73deg
Bottom Bracket Drop
67mm
Bottom Bracket Height
263mm
Chainstay Length
430mm
Chainstay Length Horizontal
424.8mm
Front-Center
602.7mm
Front-Center Horizontal
599mm
Wheelbase
1023.8mm
Fork Offset/Rake
60mm
Trail
56.3mm
mid/​neutral
Mechanical Trail
52.9mm
Wheel Flop
18.1mm
Standover Height
781mm
Tire to Pedal Spindle Distance
With 170 mm cranks
102.7mm
Pedal Spindle to Ground Clearance
With 170 mm cranks
93mm

Base Build

Wheel Size
650B, 27.5 inch (584mm BSD)
Tire Width
38mm
Tire Outer Diameter
660mm
Bike Length with Tires
1683.8mm
Crank Length
170mm
Handlebar Width
420mm
Stem Length
80mm
Suspension Type
Rigid, non-suspension corrected
Bar Type
Drop Bar
Frame Material
Steel
Fork Material
Steel
Brake Type
Disc
Source:http://www.gillesberthoud.fr/pret-a-rouler/index.php (+ Berthoud direct via Bike Insights)