SISKIU D5
A 27.5″ aluminum frame full suspension trail bike with mid-range components.
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Manufacturer Price
$1,179Weight | 37.5 lbs |
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Frame | Aluminum |
Suspension | Full, 120 / 100mm |
Fork | Suntour XCM |
Shock | Suntour |
Wheels | 27.5″ Aluminum |
Drivetrain | 1 × 9 |
Groupset | Alivio, Altus |
Brakes | Hydraulic Disc |
For This Bike
5'0" – 5'5"
5'3" – 5'9"
5'7" – 6'1"
None yet.
Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.
Dec 2021 · Ryan Palmer
Possibly the best $2,500 bike we've ever ridden.
Fully capable, modern trail bike geometry
Excellent parts spec for the price
Internal cable routing
Resin-only brake rotors create weak braking
Suspension platform isn't very sophisticated
Oct 2021 · Kelly Jorgensen
An affordable full suspension 24" kids mountain bike? The Polygon Siskiu D24 is a perfect blend of price and performance. Read the review!
Oct 2021 · Jeremy Benson
As the price of bikes continue to skyrocket, Polygon bucks that trend with their direct-to-consumer sales model and the affordable Siskiu D7. This...
Reasonable price
Comes with a dropper post
Fun on a range of terrain
Efficient climber
Playful on descents
Non-boost fork
Some cable rattle over rough terrain
Can be overwhelmed on aggressive trails
Aug 2020
Looking for a full suspension mountain bike you can actually afford? The Polygon Siskiu T just got overhauled, and it looks good.
Jun 2020
The Polygon Siskiu T7 LTD is a solid, affordable mountain bike and one that will certainly make a lot of rider’s dreams come true. Aggressive riders looking for a great budget bike should read our detailed review of the Polygon Siskiu T7 here!
Jun 2020
With its sub-$2K price tag, the Polygon Siskiu D6 aims to break the normal rules in the hardtail vs full suspension debate. Featuring a dropper post, progressive geometry, and a new frame that will take a water bottle, there's a lot to like. But is it too good to be true? Read on for our Polygon Siskiu D6 review.
Fantastic trail-ready geometry
A dropper post at this price? So good!
Nice under-bar dropper lever
Smooth and reliable Shimano brakes
Bonkers price
The fork-shaped object
Quick-release front axle
Handlebar needs more sweep
Brake levers & shifter don't quite line up
Feb 2020
Polygon's 160mm aluminum 29'er looks to deliver value and performance and shows potential for 2800 USD...
Sep 2018 · Richard Cunningham
Add this well-outfitted and sharp-handling 29er to your short list of affordable trail bikes.
Lively acceleration and climbing
Precise handling and cornering
Excellent value
No room for a water bottle
Not plush in rough terrain
No size small with 29-inch wheels
Frame | ALX XC 120MM TRAVEL (27.5”) TAPER H/T QR BOOST Color: Grey / Maroon |
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Fork | SR SUNTOUR XCM HLO, QR 100MM, 120MM (27.5”) TRAVEL Travel: 100mm Spring Type: Coil |
Shock | SR SUNTOUR RAIDON LO AIR E2E:190X51MM HARDWARE:M8X22MM Travel: 120mm Spring Type: Coil |
Bottom Bracket | INCLUDE CRANKSET |
Stem | ENTITY SPORT, ALLOY |
Handlebar | ENTITY SPORT, ALLOY |
Saddle | ENTITY VOID SADDLE |
Seatpost | ENTITY SPORT, ALLOY Type: Rigid |
Pedals | - |
Rear Derailleur | SHIMANO RD-M3100 |
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Crank | SHIMANO ALTUS FC-MT2102 36T |
Shifters | SHIMANO SL-M3100, 2x9 SPEED TRIGGER |
Cassette | SHIMANO CS-HG200 11-36T |
Chain | KMC X9 |
Brakes | SHIMANO HYDRAULIC DISC BRAKE Type: Hydraulic Disc |
Rims | ALLOY DOUBLE WALL 32H |
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Tires | SPIDERBAIT TIRE 27.5"x2.25" |
Last updated April 22
Not listed for 1,117 days