Polygon Siskiu N8

2019 MountainEnduro Manufacturer page

Last known price: $2,499

Prices shown first for United States
Travel: 170 / 170 mm Fork / rear shock
Wheels: 27.5″, 29″
Drivetrain: 1 × 12 32t / 11–50t
Gear range: 455%
Weight: 14.5 kg 32.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
MD 168–180
LG 178–189
XL 186–199

Components

13 of 17 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

ALX AM / ENDURO 170MM TRAVEL (27.5”) / 160MM TRAVEL (29”), TAPER H/T Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket
- SRAM DUB BSA
Cassette

CS NX 1230 EAGLE 12-SPEED 11-50T Not identified
Chain
- KMC
Crankset
- Truvativ DESCENDANT 6K DUB 11 speeds 32t
Rear derailleur
- SRAM NX Eagle 12 speeds
Shifters
- SRAM NX Eagle Trigger 12 speeds

Brakes

1 part

Brakes
- Tektro HD-M745
HD-M745

Wheels and tires

2 parts

Cockpit and contact points

5 parts

Handlebar
- Entity
Pedals

ALLOY Not identified
Saddle
- Entity
Seatpost

ADJUSTABLE HEIGHT W/ 125MM (S-M)/150MM (L-XL), ZERO OFFSET, 30.9MM Not identified
Stem
- Entity

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 435mm

Stack 616mm

Wheelbase 1195mm

Head angle 65.5°

Seat angle 75.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	405	435	435	456.6	485
Stackmm	592.7	592.7	616.1	626.1	638.8
Top tube lengthmm	563.8	593.8	600.1	624.5	656.2
Seat tube lengthmm	400	430	430	470	520
Head tube lengthmm	100	100	90	102	115
Head tube angle	65.5°	65.5°	65.5°	65.5°	65.5°
Seat tube angle	75°	75°	75°	75°	75°
Chainstay lengthmm	435	435	439.4	439.4	439.4
Wheelbasemm	1153.9	1183.9	1194.9	1221.1	1255.3
Front centermm	719	749	757	784	818
Bottom bracket dropmm	5	5	33	33	33
Bottom bracket heightmm	355	355	343.5	343.5	343.5
Standover heightmm	720.7	718.8	720	743.1	773.7
Fork rakemm	42	42	51	51	51
Trailmm	116	116	115	115	115
Stack/reach ratio	1.46	1.36	1.42	1.37	1.32

Not published by the manufacturer: Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 14.5 kg

32.0 lb

Suspension

Suspension configuration: Full suspension
Front travel: 170 mm
Rear travel: 170 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 18.6 in
Highest gear: 84.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.6″
Wheel material: Aluminum
Wheel size: 27.5″, 29″

Technical analysis

5 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

170 mm

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2019
Sample: 626 bicycles with this information
Coverage: 98.7% of the class

Rear travel

170 mm

This value is above the central range for this class.

Cohort: Mountain / Enduro Model year: 2019
Sample: 527 bicycles with this information
Coverage: 83.1% of the class

Lowest gear

18.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2019
Sample: 571 bicycles with this information
Coverage: 90.0% of the class

Highest gear

84.4 gear inches

This value is within the central range for this class.

Cohort: Mountain / Enduro Model year: 2019
Sample: 571 bicycles with this information
Coverage: 90.0% of the class

Shifting

Mechanical

18 of 634 bicycles with this information use electronic shifting.

Cohort: Mountain / Enduro Model year: 2019
Sample: 634 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.1 km/h
Highest gear: 32.3 km/h

Total gear range 455%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 18.6–84.4 gear inches
Class reference (p10–p90): 16.5–92.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Enduro Model year: 2019
Lowest gear: 571 bicycles with this information, 90.0% of the class
Highest gear: 571 bicycles with this information, 90.0% of the class

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2019 builds

Differences across 2019 builds
Specification	This bicycle Polygon Siskiu N8	Polygon Siskiu D5	Polygon Siskiu D7	Polygon Siskiu N8 27.5	Polygon Siskiu N8 29	Polygon Siskiu N9
Frame
Bicycle weight	14.5 kg	15.05 kg	14.4 kg	Not informed	Not informed	14.3 kg
Suspension
Front travel	170 mm	120 mm	120 mm	170 mm	160 mm	170 mm
Drivetrain
Front chainrings	1	3	2	1	1	1
Smallest chainring	32	22	22	32	32	32
Largest chainring	32	40	22	32	32	32
Rear sprockets	12	9	10	12	12	12
Smallest sprocket	11	11	11	11	11	10
Largest sprocket	50	34	36	50	50	50
Lowest gear	18.6 in	17.8 in	16.8 in	17.6 in	18.6 in	18.6 in
Highest gear	84.4 in	100.0 in	55.0 in	80.0 in	84.4 in	92.8 in
Cockpit
Seatpost	Dropper seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost
Other specifications
Bottom bracket standard	BSA	BSA	Not informed	BSA	BSA	BSA
Fork spring	Air	Coil	Air	Air	Air	Air
Tire width	2.6″	2.25″	2.25″	2.6″	2.35″	2.6″
Rear travel	170 mm	120 mm	120 mm	170 mm	160 mm	170 mm
Wheel size	27.5″ / 29″	27.5″	27.5″	27.5″	29″	27.5″ / 29″