Polygon
Polygon Siskiu HE-M
Polygon Siskiu HE-M
Choose a size first. Not sure which? See the maker spec below.
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Built as an e-SUV, the Polygon Siskiu HE-M handles city streets, back roads and light trails on one full-suspension frame. This version steps up to a 630 Wh battery and Shimano XT Di2 electronic shifting that can change gear automatically as your pace changes. Lights, fenders, a rear carrier and a dropper post are fitted as standard.
- Motor, battery and parts as the maker states them
- Shipping cost shown at checkout, before you pay
- Secure checkout by Shopify
The maker’s specification
Built as an e-SUV, the Polygon Siskiu HE-M handles city streets, back roads and light trails on one full-suspension frame. This version steps up to a 630 Wh battery and Shimano XT Di2 electronic shifting that can change gear automatically as your pace changes. Lights, fenders, a rear carrier and a dropper post are fitted as standard.
Why riders pick it
- Automatic shifting through Shimano XT Di2 picks the gear for you, so you can focus on traffic or the trail.
- The 630 Wh battery is semi-integrated and comes out for charging; Polygon quotes up to 178 km of range.
- A 130 mm SR Suntour Mobie 36 air fork and 120 mm of rear travel keep the ride composed on broken pavement and gravel.
- Mixed 29-inch front and 27.5-inch rear Schwalbe Hurricane tires roll easily on asphalt and still grip on dirt.
- The rear carrier takes panniers or a grocery load, and the dropper post drops the saddle for steep or slow sections.
Specifications
- Motor: Shimano DU-EP600 mid-drive; continuous rated power 250 watts, maximum torque 85Nm; assists to 28 mph; 3 assist modes
- Battery: 630Wh Shimano BT-EN806 (36V, 14Ah) integrated in the down tube
- Range: up to 178 km
- Speed sensor: Shimano EW-SS301 with 760mm lead
- Frameset: ALX E-SUV with 120mm of travel; Metallic Grey with Silver/Black/White decals
- Suspension fork: 130mm SR Suntour Mobie 36 Boost air with Equalizer, 3CR-PCS damping, 44mm offset
- Rear shock: 190x45mm SR Suntour Edge Plus 2CR
- Gearing: 11-speed Shimano XT Di2 with SW-M8150-R switch and RD-M8150 derailleur, LinkGlide CS-LG400 11-50T cassette, KMC E-Glide 9/10/11-speed chain
- Crankset: Shimano SM-CRE80-B, 38T
- Pedals: flat alloy, replaceable pins
- Stopping: Shimano hydraulic calipers on BR-M420 levers; SM-RT64 front and RT-EM600 rear rotors, both 203 Center Lock
- Wheels: tubeless-ready XL2 set; double-wall alloy rims 35mm wide and 17.5mm tall, 32H (622-35 front, 584-35 rear)
- Hubs: Shimano TC500 Center Lock 32H, 15x110mm front, 12x148mm rear
- Spokes: 14G stainless with 12mm brass nipples; front NDS 294mm and DS 296mm, rear NDS 276mm and DS 274mm
- Tires: Schwalbe Hurricane Addix TLE; 29"x2.40" up front, 27.5"x2.4" at the back (622/584x62)
- Cockpit: 780mm Polygon Expert bar (31.8mm, 50mm rise, 9 degree sweep) on a 40mm Polygon Expert stem with 0mm rise
- Steering bearings: sealed FSA HBS-220, ZS 44/28.6 | ZS 56/40
- Saddle: Void with ø7mm steel rails
- Dropper: Tranz X JD-YSP23JL, 30.9mm; S and M get 150mm travel and 459mm length, L and XL get 170mm travel and 499mm length
- Equipment: front and rear lights, rear carrier, fenders
Geometry and sizing
- Rider height (cm): S 153-165, M 163-175, L 173-185, XL 183-195
- Seat tube length (A): S 385, M 400, L 430, XL 450
- Seat tube angle (B): 70 on all sizes
- Effective seat tube angle (C): S 77.3, M 76.8, L 75.6, XL 76.1
- Head tube length (D): S 110, M 110, L 130, XL 130
- Head tube angle (E): S 66.8, M 67.8, L 67.8, XL 67.8
- Effective top tube (F): S 577, M 598, L 637, XL 656
- BB height (G): 353 on all sizes
- BB offset (H): 28 on all sizes
- Chainstay length (I): 457 on all sizes
- Wheelbase (J): S 1194, M 1199, L 1226, XL 1251
- Reach (K): S 439, M 454, L 474, XL 499
- Stack (L): S 612, M 616, L 635, XL 635
- Standover height (M): S 694, M 697, L 705, XL 712
Sizing
Sizing
Where the maker offers more than one size, every size is listed above and you choose one before the bike goes in your cart. The maker’s sizing or geometry, where given, is in the spec. Not sure? Send us your height and inseam before you order.
Shipping
Shipping
Dispatched in 1–2 business days, delivered in 3–5 business days within the US. The shipping cost is shown at checkout before you pay. E-bikes, their batteries and chargers follow the same estimates. See Shipping & delivery.
Returns
Returns
30-day returns on unused e-bikes in their original packaging, with battery, charger and all parts. Approved refunds are processed within 5–10 business days. Arrived damaged or defective? We arrange a replacement, repair or refund. See Returns.
E-bike rules
E-bike rules
E-bike rules vary by state and city. The motor and assist figures on this page are the maker’s own. Ask us with your state before you order if you need the classification confirmed.
Polygon Siskiu HE-M
