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Portal

2023 Jamis Bicycles Portal C4 Lo

Category
Full-suspension Trail MTB
Design
Moto/Klunker/Riser Bar, Full suspension
Frame
Carbon/Composite
Features
Disc brake
S/15.5″
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Collection
I've Ridden
M/17″
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Collection
I've Ridden
L/19″
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Collection
I've Ridden
XL/21″
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Collection
I've Ridden
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Bar type unusual for category
This: Moto/Klunker/Riser Bar
Category: Flat Bar
vs category
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Bar type unusual for category
This: Moto/Klunker/Riser Bar
Category: Flat Bar
vs category
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Bar type unusual for category
This: Moto/Klunker/Riser Bar
Category: Flat Bar
vs category
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Bar type unusual for category
This: Moto/Klunker/Riser Bar
Category: Flat Bar
vs category

Geometry

S/15.5″
M/17″
L/19″
XL/21″
Stack
606mm
615mm
625mm
634mm
Reach
418mm
439mm
461mm
482mm
Stack to Reach Ratio
1.45:1
1.4:1
1.36:1
1.32:1
Top Tube Length, Effective/Horizontal Center
585mm
610mm
635mm
660mm
Head Tube Angle
67deg
67deg
67deg
67deg
Seat Tube Angle
74deg
74deg
74deg
74deg
Head Tube Length
105mm
115mm
125mm
135mm
Bottom Bracket Drop
33mm
33mm
33mm
33mm
Bottom Bracket Height
339mm
339mm
339mm
339mm
Chainstay Length
437mm
437mm
437mm
437mm
Chainstay Length Horizontal
435.8mm
435.8mm
435.8mm
435.8mm
Front-Center
713mm
738mm
763mm
788.9mm
Front-Center Horizontal
712.3mm
737.3mm
762.3mm
788.3mm
Wheelbase
1148mm
1173mm
1198mm
1224mm
Fork Offset/Rake
51mm
51mm
51mm
51mm
Trail
102.5mm
very high
102.5mm
very high
102.5mm
very high
102.5mm
very high
Mechanical Trail
94.3mm
94.3mm
94.3mm
94.3mm
Wheel Flop
36.9mm
36.9mm
36.9mm
36.9mm
Standover Height
754mm
749mm
754mm
774mm
Tire to Pedal Spindle
171.1mm
170 mm cranks
196mm
170 mm cranks
221mm
170 mm cranks
247mm
170 mm cranks
Pedal Spindle to Ground Clearance
169mm
170 mm cranks
169mm
170 mm cranks
169mm
170 mm cranks
169mm
170 mm cranks

C4 Lo Build

S/15.5″
M/17″
L/19″
XL/21″
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
Tire Width
2.4in
2.4in
2.4in
2.4in
Tire Outer Diameter
743.9mm
743.9mm
743.9mm
743.9mm
Bike Length with Tires
1891.9mm
1916.9mm
1941.9mm
1967.9mm

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
Full-suspension Trail MTB
Source:https://www.jamisbikes.com/bikes/mountain-bikes/3vo/portal/
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