2021 Format 1311 Plus Base

Design
Flat Bar, Hardtail (Front suspension)
Frame
Aluminum
Suspension
150mm fork travel
Features
Rim brake
Somewhat upright stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Somewhat upright stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

M
L
Stack
643mm
643mm
Reach
420mm
440mm
Stack to Reach Ratio
1.53:1
1.46:1
Seat Tube Length, C-T
430mm
460mm
Top Tube Length, Effective/Horizontal Center
604mm
624mm
Top Tube Slope
23.1deg
19.5deg
Head Tube Angle
66deg
66deg
Seat Tube Angle
74deg
74deg
Head Tube Length
120mm
120mm
Bottom Bracket Drop
50mm
50mm
Bottom Bracket Height
308mm
308mm
Chainstay Length
428mm
428mm
Chainstay Length Horizontal
425.1mm
425.1mm
Front-Center
741.6mm
761.6mm
Front-Center Horizontal
739.9mm
759.9mm
Wheelbase
1165mm
1185mm
Fork Offset/Rake
51mm
51mm
Fork Length (On-Axis)
552mm
552mm
Trail
103.6mm
very high
103.6mm
very high
Mechanical Trail
94.6mm
94.6mm
Wheel Flop
38.5mm
38.5mm
Tire to Pedal Spindle
213.6mm
170 mm cranks
233.5mm
170 mm cranks
Pedal Spindle to Ground Clearance
138mm
170 mm cranks
138mm
170 mm cranks

Base Build

M
L
Wheel Size
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
Tire Width
2.6in
2.6in
Tire Outer Diameter
716.1mm
716.1mm
Bike Length with Tires
1881.1mm
1901.1mm
Handlebar Width
760mm
760mm
Stem Length
45mm
45mm
Stem Angle
7deg
7deg

Stack and Reach vs. Category Trend

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.

Learn more about the Upright/Aggressive Scale
Category Trend
Hardtail Trail MTB
Source:https://format.bike/catalog/mtb/format-1311-plus-2021/