2021 Polygon Bikes Siskiu D24 Base

Category
Kids MTB
Design
Flat Bar, Full suspension
Frame
Aluminum
Suspension
120mm fork travel, 120mm rear travel
Very upright stack and reachvs category
Suspension sag unknown
Geometry may mis-represent actual riding geometry

Geometry

Youth 24
Stack
534.1mm
Reach
350mm
Stack to Reach Ratio
1.53:1
Seat Tube Length, C-T
317mm
Top Tube Length, Effective/Horizontal Center
493.1mm
Top Tube Slope
27.6deg
Head Tube Angle
66deg
Seat Tube Angle
73.5deg
Head Tube Length
90mm
Bottom Bracket Drop
10mm
Bottom Bracket Height
304.5mm
Chainstay Length
400mm
Chainstay Length Horizontal
399.9mm
Front-Center
628.4mm
Front-Center Horizontal
628.3mm
Wheelbase
1028.2mm
Fork Offset/Rake
40mm
Fork Length (Axle-To-Crown)
501mm
Trail
96.2mm
very high
Mechanical Trail
87.9mm
Wheel Flop
35.8mm
Standover Height
598.4mm
Tire to Pedal Spindle
173.9mm
140 mm cranks
Pedal Spindle to Ground Clearance
164.5mm
140 mm cranks

Base Build

Youth 24
Wheel Size
24 in
507 mm BSD
Tire Width
2.4in
Tire Width Max
2.6in
Tire Outer Diameter
628.9mm
Bike Length with Tires
1657.1mm
Crank Length
140mm
Handlebar Width
640mm
Stem Length
40mm

Published Sizing Recommendations

Height
4 ft 2 in
to
4 ft 9 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
Category Trend
Kids MTB
Source:https://www.bikesonline.com/2024-polygon-siskiu-d24-dual-suspension-kids-bike