2020 Allebike/MB31 Gravel GRX

Design
Drop Bar, Rigid, non-suspension corrected
Frame
Aluminum
Fork
Carbon/Composite
Features
Disc brake
Average stack and reachvs category
Very aggressive stack and reachvs category
Very aggressive stack and reachvs category
Very aggressive stack and reachvs category
Very aggressive stack and reachvs category

Geometry

XS
S
M
L
XL
Stack
543mm
549mm
567mm
591mm
611mm
Reach
373mm
395mm
405mm
412mm
431mm
Stack to Reach Ratio
1.46:1
1.39:1
1.4:1
1.43:1
1.42:1
Seat Tube Length, C-T
462mm
492mm
522mm
552mm
582mm
Top Tube Length, Effective/Horizontal HT Top
534mm
558mm
573mm
587mm
612mm
Top Tube Slope
11.2deg
8.2deg
6.9deg
6.2deg
5.1deg
Head Tube Angle
70.5deg
70.5deg
70.5deg
70.5deg
70.5deg
Seat Tube Angle
73.5deg
73.5deg
73.5deg
73.5deg
73.5deg
Head Tube Length
124mm
133mm
143mm
169mm
190mm
Bottom Bracket Drop
75mm
75mm
75mm
75mm
75mm
Bottom Bracket Height
276mm
276mm
276mm
276mm
276mm
Chainstay Length Horizontal
430mm
430mm
430mm
430mm
430mm
Front-Center
601.7mm
603.7mm
624.5mm
640.4mm
666.2mm
Front-Center Horizontal
597mm
599mm
620mm
636mm
662mm
Wheelbase
1027mm
1029mm
1050mm
1066mm
1092mm
Fork Offset/Rake
54.9mm
34.1mm
38.4mm
38.9mm
38.8mm
Fork Length (On-Axis)
395mm
395mm
395mm
395mm
395mm
Trail
66mm
high
88.2mm
very high
83.5mm
very high
83mm
very high
83.1mm
very high
Mechanical Trail
62.2mm
83.1mm
78.7mm
78.3mm
78.3mm
Wheel Flop
20.8mm
27.7mm
26.3mm
26.1mm
26.2mm
Tire to Pedal Spindle
78.2mm
172.5 mm cranks
80.2mm
172.5 mm cranks
101mm
172.5 mm cranks
116.9mm
172.5 mm cranks
142.7mm
172.5 mm cranks
Pedal Spindle to Ground Clearance
103.5mm
172.5 mm cranks
103.5mm
172.5 mm cranks
103.5mm
172.5 mm cranks
103.5mm
172.5 mm cranks
103.5mm
172.5 mm cranks

GRX Build

XS
S
M
L
XL
Wheel Size
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
700C/29 in
622 mm BSD
Tire Width
40mm
40mm
40mm
40mm
40mm
Tire Width Max
47mm
47mm
47mm
47mm
47mm
Tire Outer Diameter
702mm
702mm
702mm
702mm
702mm
Bike Length with Tires
1729mm
1731mm
1752mm
1768mm
1794mm
Crank Length
172.5mm
172.5mm
172.5mm
172.5mm
172.5mm
Handlebar Width
420mm
420mm
440mm
440mm
440mm
Stem Length
70mm
70mm
70mm
70mm
70mm

Published Sizing Recommendations

Height
148 cm
to
166 cm
158 cm
to
172 cm
168 cm
to
178 cm
174 cm
to
186 cm
182 cm
to
196 cm

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
All-road/Gravel
Source:https://www.allebike-sports.com/Allebike/MB31/MB31_Gravel/MB31_Gravel_GRX_Black?id=C50001