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.
 |  |  |
| MSRP | $1,499 | $2,189 | $1,375 |
|---|---|---|---|
| Spec Level | |||
| Where to Buy | — $1 At | — $1 At | — $1 At |
| Category | Trail | Trail | Crosscountry |
| Weight | 37.6 lbs | ||
| Frame | Aluminum | Aluminum | Aluminum |
| Fork | Suntour XCR 32 Air | RockShox Recon Silver RL | Suntour XCM |
| Wheels | Aluminum | Aluminum | Aluminum |
| Wheel Size | 27.5″ / 29″ | 29″ | 27.5″ |
| Brakes | Hydraulic Disc | Hydraulic Disc | Hydraulic Disc |
| Groupset | Deore | Deore, FSA | Acera |
| Drivetrain | 1 × 10 | 1 × 12 | 1 × 9 |
| Suspension | Full | Full | Full |
| Front Travel | 120mm | 130mm | 120mm |
| Rear Travel | 120mm | 125mm | 100mm |
| Seatpost | Dropper | Dropper | Rigid |
| Brand Site | bikesonline.com | marinbikes.com | diamondback.com |
Can't decide? Get free advice from a Curated Expert.
Shop with an ExpertBased on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more »
Polygon Siskiu D6 Dual Suspension
Marin Rift Zone 29 2
Diamondback Atroz 2
| Frame | 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 |
|---|---|---|---|
| Fork | 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 |
| Headset | 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 |
| Stem | Entity Sport, Alloy, 0 Degree | Marin 3D Forged Alloy, 35mm | Diamondback "Shortie", 45mm Reach, 31.8 Bar Bore |
| Handlebar | 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 |
| Saddle | Entity Void Saddle | Marin Speed Concept | DB Sync'r Saddle |
| Seatpost | 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 |
| Pedals | Flat Alloy | - | DB4L Aluminum Platform |
| Grips | 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 | |
| Crank | 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 |
| Shifters | Shimano SL-M4100 1x10-Speed Trigger | Shimano Deore, 12-Speed, SL-6100IR | Shimano Acera M3000, 9 Speed |
| Cassette | Shimano CS-M4100, 10-46T, 10-Speed | Shimano, Deore M6100, 12-Speed, 10-51T | Shimano HG200, 9 Speed, 11-36T |
| Chain | KMC X10, 10-Speed | KMC X-12 Silver and Black | KMC Z9, 9 Speed |
| Brakes | 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 |
| Rims | 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 |
|---|---|---|---|
| Spokes | 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 |
| Tires | 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 |