2020 Alchemy Bicycles Arktos 27.5 Base

Design
Flat Bar, Full suspension
Frame
Carbon/Composite
Suspension
170mm fork travel
Features
Disc brake
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry
Average stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

S
M
L
XL
Stack
589mm
599mm
604mm
614mm
Reach
401mm
415mm
431mm
448mm
Stack to Reach Ratio
1.47:1
1.44:1
1.4:1
1.37:1
Seat Tube Length, C-T
420mm
455mm
483mm
518mm
Top Tube Length, Effective/Horizontal HT Top
585mm
600mm
615mm
642mm
Head Tube Angle
65.5deg
65.5deg
65.5deg
65.5deg
Effective Seat Tube Angle, Seat Tube Top
73.5deg
73.5deg
73.5deg
73.5deg
Head Tube Length
100mm
110mm
115mm
130mm
Bottom Bracket Drop
10mm
10mm
10mm
10mm
Bottom Bracket Height
343mm
343mm
343mm
343mm
Chainstay Length
438mm
438mm
438mm
438mm
Chainstay Length Horizontal
437.9mm
437.9mm
437.9mm
437.9mm
Front-Center
723.2mm
733.2mm
747.2mm
774.2mm
Front-Center Horizontal
723.1mm
733.1mm
747.1mm
774.1mm
Wheelbase
1161mm
1171mm
1185mm
1212mm
Fork Offset/Rake
39mm
39mm
39mm
39mm
Trail
118mm
very high
118mm
very high
118mm
very high
118mm
very high
Mechanical Trail
107.4mm
107.4mm
107.4mm
107.4mm
Wheel Flop
44.5mm
44.5mm
44.5mm
44.5mm
Standover Height
756mm
780mm
798mm
826mm
Tire to Pedal Spindle
200.2mm
170 mm cranks
210.2mm
170 mm cranks
224.2mm
170 mm cranks
251.2mm
170 mm cranks
Pedal Spindle to Ground Clearance
173mm
170 mm cranks
173mm
170 mm cranks
173mm
170 mm cranks
173mm
170 mm cranks

Base Build

S
M
L
XL
Wheel Size
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
650B/27.5 in
584 mm BSD
Tire Width
2.4in
2.4in
2.4in
2.4in
Tire Outer Diameter
705.9mm
705.9mm
705.9mm
705.9mm
Bike Length with Tires
1866.9mm
1876.9mm
1890.9mm
1917.9mm

Published Sizing Recommendations

Height
5 ft 1 in
to
5 ft 5 in
5 ft 5 in
to
5 ft 9 in
5 ft 9 in
to
6 ft 1 in
6 ft 1 in
to
6 ft 5 in

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
Source:https://alchemybicycles.com/product/arktos-275/