Bike Comparison

The Polygon Siskiu D6 Dual Suspension, Marin Rift Zone 29 2, and Diamondback Atroz 2 are all aluminum frame full suspension mountain bikes. The Siskiu D6 Dual Suspension has 27.5″ / 29″ aluminum wheels; the Rift Zone 29 2 has 29″ aluminum wheels, a better fork, and more travel; and the Atroz 2 has a rigid seatpost and 27.5″ aluminum wheels. Explore the differences below.

    2022 Polygon Siskiu D6 Dual Suspension
    2022 Marin Rift Zone 29 2
    2022 Diamondback Atroz 2
    Spec Level
    Where to Buy






    Weight37.6 lbs
    ForkSuntour XCR 32 AirRockShox Recon Silver RLSuntour XCM
    Wheel Size27.5″ / 29″29″27.5″
    BrakesHydraulic DiscHydraulic DiscHydraulic Disc
    GroupsetDeoreDeore, FSAAcera
    Drivetrain1 × 101 × 121 × 9
    Front Travel120mm130mm120mm
    Rear Travel120mm125mm100mm

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    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
    Siskiu D6 Dual Suspension
    Rift Zone 29 2
    Atroz 2

    Gear Range

    Polygon Siskiu D6 Dual Suspension

    28 mph

    Marin Rift Zone 29 2

    28 mph

    Diamondback Atroz 2

    22 mph

    Learn More



    ALX XC Trail 6061 Aluminum Frame, 120mm Travel, Internal Routed Gear & Dropper Cables, Tapered Headtube, 73mm Threaded Boost BB, 148x12mm Boost Thru-Axle

    Series 3 6061 Aluminum Frame, 29” Wheels, 125mm Travel, MultiTrac Suspension Platform, 148x12 Boost Spacing2, 73mm Threaded BB w/ ISCG05 Tabs

    Atroz 6061 T-6 Aluminum 27.5 Trail w/ 4" travel, Optimized Single Pivot, Tapered Steerer, Machine Formed Top Tube, Butted / Formed Down Tube, Sealed Cartridge Bearing Pivot, Seat Tube Routed for Internal Dropper Post, Aggressive Geometry, Replaceable Hanger


    SR Suntour XCR 32, Air Spring, 120mm Travel (27.5" & 29"), Rebound & Compression Adjuster, 15x100mm Thru-Axle

    RockShox Recon Silver RL 29", 130mm Travel, Solo Air, Compression and Rebound Adjustment, Alloy Tapered Steerer, Fast Black Uppers, 110x15mm Boost Spacing, Maxle Stealth, 42mm Offset

    SR Suntour XCM 120mm Travel, 30mm Stanchions, w/ Preload Adjust

    Rear Shock

    X-Fusion O2 Pro RL, Air Spring, Rebound & Compression Adjuster, E2E 190x45mm, M8x25mm Hardware

    SR Suntour Raidon-R, Air Shock w/ Rebound Adjust, 184x44mm

    Bottom Bracket

    Shimano BSA Threaded 73mm

    External Sealed Cartridge Bearing

    Sealed Cartridge


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

    FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”

    FSA NO.57, Sealed Cartridge for Tapered Headtube


    Entity Sport, Alloy, 0 Degree

    Marin 3D Forged Alloy, 35mm

    Diamondback "Shortie", 45mm Reach, 31.8 Bar Bore


    Entity Sport, Alloy, 12mm Rise, 6 Degree Back Sweep, 31.8mm

    Marin Mini-Riser, 6061 Double Butted Aluminum, 780mm Width, 28mm Rise, 5º Up, 9º Back

    Diamondback, 750mm Wide, 15mm Rise, 31.8 Bar Bore


    Entity Void Saddle

    Marin Speed Concept

    DB Sync'r Saddle


    TranzX JD-YSP23JL Dropper Post, Zero Offset, 30.9mm, Remote Lever

    TranzX, YSP23JL, 1x Remote, Size S 125mm Travel, Size M and L 150mm Travel, Size XL 175mm Travel, 30.9mm

    Aluminum Micro Adjust, 30.9mm


    Flat Alloy


    DB4L Aluminum Platform


    Marin Single Clamp Locking

    New DB "Flanged" 135mm Silcone

    Rear Derailleur

    Shimano Deore RD-M5120, 10-Speed, Direct Mount

    Shimano Deore, 12-Speed, SGS

    Shimano Acera M3000 Shadow, 9 Speed

    Front Derailleur


    Full ISCG-05 Chain Guide w/ Roller


    Shimano Deore FC-MT5100, 32T, 10-Speed, Hollowtech II, Boost

    FSA Comet, Modular 1x, 32T Direct Mount Chainring, MegaTooth Technology, Boost Spacing

    Aluminum Arm w/ 30T Steel "Narrow Wide" Single Ring


    Shimano SL-M4100 1x10-Speed Trigger

    Shimano Deore, 12-Speed, SL-6100IR

    Shimano Acera M3000, 9 Speed


    Shimano CS-M4100, 10-46T, 10-Speed

    Shimano, Deore M6100, 12-Speed, 10-51T

    Shimano HG200, 9 Speed, 11-36T


    KMC X10, 10-Speed

    KMC X-12 Silver and Black

    KMC Z9, 9 Speed


    Shimano BR-M201 Hydraulic

    Hydraulic Disc

    Shimano MT200 Hydraulic Disc, w/ 180mm Front and Rear Rotors

    Brake Levers

    Shimano BL-MT201 Hydraulic Disc

    Shimano MT200 Hydraulic


    Entity X15 Doublewall Disc 32H, 25mm Internal Width, Tubeless Ready **

    Marin, Double Wall Alloy, 29mm Inner, Pinned Joint, Disc Specific, 32H, Tubeless Compatible

    32H, DDM-5, 27.5 Double Wall, Not Taped


    Entity Stainless, Brass Nipple

    14g Stainless Steel

    Front Hub

    Shimano HB-MT400, Thru Axle 15x100mm, 32H Center-Lock

    Shimano HF-MT410B, 110x15mm, Centerlock

    Formula Hubs, 32h Aluminum w/ CNC Disc Mount

    Rear Hub

    Shimano FH-MT400, Thru Axle 12x148mm, 32H Center-Lock

    Shimano HB-MT410B, 148x12mm, Centerlock, Microspline Freehub Body

    Formula Hubs, 32h Aluminum Cassette w/ CNC Disc mount


    Entity Spiderbait 27.5x2.25" / 29x2.25" *

    Vee Tire Flow Snap 29x2.35", Tackee Compound, Tubeless Ready

    VEE Rubber, Flow Snap, 27.5x2.35, Non Tubless Tire

    Disk Rotors

    Shimano SM-RT10 Centerlock, F: 180mm / R: 160mm