Polygon Siskiu D7

2019 MountainTrail

Last known price: $1,299

Prices shown first for United States
Travel: 120 / 120 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 2 × 10 22t / 11–36t
Gear range: 327%
Weight: 14.4 kg 31.7 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

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

Components

19 of 23 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

Aluminum Not identified

Suspension

2 parts

Drivetrain

8 parts

Bottom bracket
- Shimano
Cassette
- Shimano CS-HG50-10 10 speeds
CS-HG50-10
Chain
- KMC X10 10 speeds
X-10
Chain guide

None
Crankset
- Shimano FC-M617
FC-M617
Front derailleur
- Shimano FD-M617-E
FD-M617
Rear derailleur
- Shimano RD-M786-SGS
RD-M786-SGSRD-M786SGS
Shifters
- Shimano Deore SL-M610
SL-M610

Brakes

2 parts

Brake levers
- Shimano BL-M365
BL-M365
Brakes
- Shimano BR-M365
BR-M365

Wheels and tires

5 parts

Front hub
- Shimano HB-RM33
HB-RM33
Rear hub
- Shimano FH-RM33
FH-RM33
Rims

Araya DM 650 Not identified
Spokes

Stainless steel Not identified
Tires
- Schwalbe Smart Sam

Cockpit and contact points

6 parts

Handlebar
- Entity
Headset

FP-H856 Not identified

FP-H856
Pedals
- VP
VP-349
Saddle
- Entity
Seatpost
- Entity
Stem
- Entity

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 423mm

Stack 583mm

Wheelbase 1141mm

Head angle 67.5°

Seat angle 74.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	403.4	423.4	445.9	465.9
Stackmm	582.6	582.6	445.9	465.9
Top tube lengthmm	565	585	610	630
Seat tube lengthmm	385	435	485	520
Head tube lengthmm	115	115	125	125
Head tube angle	67.5°	67.5°	67.5°	67.5°
Seat tube angle	74.5°	74.5°	74.5°	74.5°
Chainstay lengthmm	438	438	438	438
Wheelbasemm	1120.7	1140.7	1167	1187
Front centermm	684	704	730	750
Bottom bracket dropmm	22	22	22	22
Bottom bracket heightmm	334	334	334	334
Standover heightmm	676.8	703.8	740.6	757.5
Fork rakemm	44	44	100	92
Trailmm	100	100	39	48
Stack/reach ratio	1.44	1.38	1.00	1.00

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: 14.4 kg

31.7 lb

Suspension

Suspension configuration: Full suspension
Front travel: 120 mm
Rear travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 22
Largest chainring: 22
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 16.8 in
Highest gear: 55.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire width: 2.25″
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

4 measures

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

Front travel

120 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 986 bicycles with this information
Coverage: 96.6% of the class

Lowest gear

16.8 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 968 bicycles with this information
Coverage: 94.9% of the class

Highest gear

55.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 968 bicycles with this information
Coverage: 94.9% of the class

Shifting

Mechanical

34 of 1,020 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2019
Sample: 1,020 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.4 km/h
Highest gear: 21.1 km/h

Total gear range 327%

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: 16.8–55.0 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 / Trail Model year: 2019
Lowest gear: 968 bicycles with this information, 94.9% of the class
Highest gear: 968 bicycles with this information, 94.9% 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
Specification	This bicycle Polygon Siskiu D7	Polygon Siskiu D5	Polygon Siskiu N8	Polygon Siskiu N8 27.5	Polygon Siskiu N8 29	Polygon Siskiu N9
Frame
Bicycle weight	14.4 kg	15.05 kg	14.5 kg	Not informed	Not informed	14.3 kg
Suspension
Front travel	120 mm	120 mm	170 mm	170 mm	160 mm	170 mm
Drivetrain
Front chainrings	2	3	1	1	1	1
Smallest chainring	22	22	32	32	32	32
Largest chainring	22	40	32	32	32	32
Rear sprockets	10	9	12	12	12	12
Smallest sprocket	11	11	11	11	11	10
Largest sprocket	36	34	50	50	50	50
Lowest gear	16.8 in	17.8 in	18.6 in	17.6 in	18.6 in	18.6 in
Highest gear	55.0 in	100.0 in	84.4 in	80.0 in	84.4 in	92.8 in
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost
Other specifications
Fork spring	Air	Coil	Air	Air	Air	Air
Tire width	2.25″	2.25″	2.6″	2.6″	2.35″	2.6″
Rear travel	120 mm	120 mm	170 mm	170 mm	160 mm	170 mm
Wheel size	27.5″	27.5″	27.5″ / 29″	27.5″	29″	27.5″ / 29″
Bottom bracket standard	Not informed	BSA	BSA	BSA	BSA	BSA