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2021 Polygon SISKIU D5
2021 Polygon SISKIU D7
2021 Polygon SISKIU T7
2021 Polygon SISKIU T8
2021 Polygon Siskiu N7 Dual Suspension
2021 Polygon Siskiu N9 Dual Suspension
2021 Polygon SISKIU N9
MSRP$1,099$1,799$2,049$2,499$2,599$3,099$3,099
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CategoryTrailTrailTrailTrailEnduroEnduroDownhill
Weight37.5 lbs36.0 lbs34.4 lbs33.5 lbs37.0 lbs39.9 lbs39.9 lbs
FrameAluminumAluminumAluminumAluminumAluminumAluminumAluminum
ForkSunTour XCM HLO
RockShox Recon Silver RL
RockShox Recon Silver RL
Fox Rhythm Float 34
RockShox Yari RC
Fox Performance Float 36
Fox Performance Float 36
Wheel Size27.5″27.5″ / 29″27.5″ / 29″27.5″ / 29″27.5″ / 29″27.5″27.5″ / 29″
Wheel MaterialAluminumAluminumAluminumAluminumAluminumAluminumAluminum
Brake TypeHydraulic DiscHydraulic DiscHydraulic DiscHydraulic DiscHydraulic DiscHydraulic DiscHydraulic Disc
GroupsetSora, Alivio
Deore
Deore, Shimano
SLX, Shimano
Deore
XT
XT
Drivetrain1 × 91 × 111 × 121 × 121 × 121 × 121 × 12
Gear Range

Polygon SISKIU D5

27 mph

Polygon SISKIU D7

25 mph

Polygon SISKIU T7

28 mph

Polygon SISKIU T8

28 mph

Polygon Siskiu N7 Dual Suspension

28 mph

Polygon Siskiu N9 Dual Suspension

26 mph

Polygon SISKIU N9

28 mph
SuspensionFullFullFullFullFullFullFull
Front Travel100mm120mm150mm150mm160mm170mm170mm
Rear Travel120mm120mm140mm140mm160mm170mm170mm
SeatpostRigidRigidRigidRigidDropperDropperRigid
Brand Sitebikesonline.compolygonbikes.compolygonbikes.compolygonbikes.combikesonline.combikesonline.combikesonline.com
Suggested Bikes

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more

Spec level →$0$500$1,000$1,500$2,000$2,500$3,000
SISKIU D5
SISKIU D7
SISKIU T7
SISKIU T8
Siskiu N7 Dual Suspension
Siskiu N9 Dual Suspension
SISKIU N9

Geometry

Specs
Frame

ALX XC 120MM TRAVEL (27.5”) TAPER H/T QR BOOST

ALX XC 120MM TRAVEL (27.5”) / 120MM TRAVEL (29”), TAPER H/T TA BOOST

ALX TRAIL FRAME 140MM TRAVEL (27.5”) / 135MM TRAVEL (29”), TAPER H/T

ALX TRAIL FRAME 140MM TRAVEL (27.5”) / 135MM TRAVEL (29”), TAPER H/T

ALX AM Enduro Alloy Boost Frame 170mm (27.5") / 160mm Travel (29"), Tapered Headtube, Internal Routing

ALX AM / Enduro Alloy Boost frame 170mm travel (27.5”) / 160mm travel (29”),

ALX AM / ENDURO 170MM TRAVEL (27.5”) / 160MM TRAVEL (29”), TAPER H/T TA BOOST

Fork

SR SUNTOUR XCM HLO, QR 100MM, 120MM (27.5”) TRAVEL

ROCKSHOX RECON RL, 15X100MM, 120MM (27.5”) / 120MM (29”) TRAVEL

ROCKSHOX RECON RL BOOST 15X110MM, 150MM (27.5”) / 140MM (29”) TRAVEL

FOX 34 RHYTHM BOOST 15X110MM, 150MM (27.5”) / 140MM (29”) TRAVEL

RockShox Yari 170mm (27.5") / 160mm (29") Travel, DebonAir, External Rebound, Low Speed Compression, Tapered Steerer, 15x110mm Boost Thru Axle

Fox 36 Performance, Boost 15X110MM, 170MM (27.5”) / 160MM (29”) travel

FOX PERFORMANCE 36 FLOAT 170MM (27.5”) / 160MM (29”) TRAVEL

Rear Shock

SR SUNTOUR RAIDON LO AIR E2E:190X51MM HARDWARE:M8X22MM

ROCKSHOX DELUXE SELECT PLUS E2E: 190X45MM METRIC, HARDWARE: M8X25MM

ROCKSHOX DELUXE PLUS SELECT SPECIAL TUNING E2E:210X55MM, HARDWARE:8MMX25MM

FOX FLOAT DPS SPECIAL TUNING E2E:210X55MM, HARDWARE:8MMX25MM

Fox Performance Float DPS Air shock, 3 Position Compression Lever, Rebound Adjustment

Fox Performance Float DPX2 Air shock

FOX PERFORMANCE FLOAT DPX2 E2E:205X65, 3 POS LEVER, LV EVOL, HARDWARE:8MMX25MM & TRUNNION

Bottom Bracket

INCLUDE CRANKSET

SHIMANO DEORE

BSA THREADED

BSA THREADED

Shimano BSA Threaded

SHIMANO BSA THREADED

SHIMANO BSA THREADED

Headset

ZS 44/28.6 | ZS 56/40

Threadless Zero Stack Headset, ZS 44/28.6 | ZS 56/40

FSA No.57E, Zero Stack (ZS) Sealed Bearing, ZS 44/28.6 | ZS 56/40

Stem

ENTITY SPORT, ALLOY

ENTITY XPERT, ALLOY

ENTITY XPERT, ALLOY E:35MM R:7DEG BB:35MM

ENTITY XPERT, ALLOY E:35MM R:7DEG BB:35MM

Entity Xpert, Alloy, 0 Degree

RACE FACE AEFFECT, ALLOY E:35MM R:0DEG BB:35MM

RACEFAE AEFFECT R35, ALLOY E:50MM R:0DEG BB:35MM

Handlebar

ENTITY SPORT, ALLOY

ENTITY XPERT, ALLOY

ENTITY XPERT, ALLOY W:780MM R:20MM BB:35MM

ENTITY XPERT, ALLOY W:780MM R:20MM BB:35MM

Entity Xpert, Alloy, 35mm Bar Bore, 20mm Rise, 6 Degree Backsweep

RACE FACE AEFFECT, ALLOY W:780MM R:20MM BB:35MM

RACEFACE AEFFECT R35, ALLOY W:780MM R:20MM BB:35MM

Saddle

ENTITY VOID SADDLE

ENTITY VOID SADDLE

ENTITY XTENT

ENTITY XTENT

Entity Xtent

Entity Assault Saddle

ENTITY XTENT

Seatpost

ENTITY SPORT, ALLOY

DROPEPR POST 150mm (S&M) / 170mm (L & XL)

DROPEPR POST 150mm (S & M) / 170mm (L & XL)

DROPEPR POST 150mm (S & M) / 170mm (L & XL)

TranzX JD-YSP23JL Dropper Post, Remote Handlebar Lever, Travel: 150mm (S-M), 170mm (L-XL), Length: 459mm (S-M) / 499mm (L-XL), Zero offset, Diameter: 30.9mm

EXA Form Drive SI Dropper Post (150mm S-M, 170mm L-XL), Zero offset, 30.9mm

DROPEPR POST 150mm (S&M) / 170mm (L & XL)

Pedals

PP FLAT PEDAL

Alloy flat pedal

Flat Alloy w/ Replaceable Pins (Included)

Alloy

Alloy

Groupset
Rear Derailleur

SHIMANO RD-M3100

SHIMANO DEORE RD-M5100

SHIMANO RD-M6100 DEORE

SHIMANO RD-M7100 SLX

Shimano Deore RD-M6100 12-Speed, Direct Attached

SHIMANO XT RD-M8100 12-SPEED DA

SHIMANO XT RD-M8100 12-SPEED DA

Front Derailleur

SHIMANO ALIVIO FD-M3120-E

N/A

N/A

Crank

SHIMANO ALTUS FC-MT2102 36T

SHIMANO DEORE FC-M5100 32T

SHIMANO FC-MT510-1 BOOST 32T 170MM (S-M)/175MM (L-XL)

SHIMANO FC-MT510-1 BOOST 32T 170MM (S-M)/175MM (L-XL)

Shimano Deore FC-MT5101, 32T, Hollowtech II, Boost

Shimano Deore XT FC-M8100-1 BOOST 12SP 32T 170MM (S-M) 175MM (L-XL)

SHIMANO DEORE XT FC-M8100-1 BOOST 12SP 32T 170MM (S-M) 175MM (L-XL)

Shifters

SHIMANO SL-M3100, 2x9 SPEED TRIGGER

SHIMANO DEORE SL-M5100, 1x11SPEED TRIGGER

SHIMANO SL-M6100-R DEORE

SHIMANO SL-M7100-R SLX

Shimano Deore SL-M6100 12-Speed

SHIMANO XT SLM8100 12-SPEED

SHIMANO XT SLM8100 12-SPEED

Cassette

SHIMANO CS-HG200 11-36T

SHIMANO DEORE CS-M5100 11-51T

SHIMANO CS-M6100-12 DEORE 10-51T

SHIMANO CS-M7100-12 SLX 10-51T

Shimano Deore CS-M6100, 12-Speed, 10-51T MicroSpline, HyperGlide+

SHIMANO XT CSM8100 12-SPEED 10-51T

SHIMANO XT CSM8100 12-SPEED 10-51T

Chain

KMC X9

KMC X11-1

KMC X12 12SPEED

KMC X12 12SPEED

KMC X12 12-speed

SHIMANO CN-M7100

Chain Guide

none

Brakes

SHIMANO HYDRAULIC DISC BRAKE

SHIMANO MT200 HYDRAULIC DISC BRAKE

TEKTRO HD-M735

TEKTRO HD-M745 4 PISTON

Shimano Deore BR-MT420, 4-Piston Hydraulic

TRP Slate 4-Piston Hydraulic 180mm rotors

TRP SLATE T4 4 PISTON

Brake Levers

SHIMANO BL-M201 HYDRAULIC DISC BRAKE

Wheels
Rims

ALLOY DOUBLE WALL 32H

ALLOY DOUBLE WALL 32H

ENTITY XL2 DISC 584-35 (27.5”) / 622-35 (29”)

ENTITY XL2 DISC 584-35 (27.5”) / 622-35 (29”)

Entity XL2 Disc, 35mm Inner Width, Tubeless Ready*

Entity XL2 Disc 29-584 (27.5”) / 29-622 (29”), tubeless ready

ENTITY XL2 DISC 35-584 (27.5”) / 35-622 (29”)

Spokes

Stainless Steel Spokes

Entity Stainless, Brass Nipple

Stainless Steel Spokes

Stainless Steel Spokes

Front Hub

Shimano alloy hubs

Shimano HB-MT410, Centerlock, 32H, 15x110mm

Entity, sealed bearings

Entity, sealed bearings

Rear Hub

Shimano alloy hubs

Shimano HB-MT410, Centerlock, 32H, MicroSpline Body, 12x148mm

Entity, sealed bearings

Entity, sealed bearings

Tires

SPIDERBAIT TIRE 27.5"x2.25"

SCHWALBE NOBBY NIC PERFORMANCE 27.5"x2.25" / 29"x2.25"

PERFORMANCE TIRE, 27.5”X2.40” / 29”X2.40”

PERFORMANCE TIRE, 27.5”X2.40” / 29”X2.40”

Schwalbe Magic Mary 27.5x2.60" / 29x2.60" Super Gravity, Addix Soft, Tubeless Ready

WTB Vigilante 27.5”X2.6 / 29”X2.3

WTB VIGILANTE 27.5”X2.6 / 29”X2.3

Disk Rotors

Shimano SM-RT54, Rotors F/R: 180/180mm