Bike Comparison
 |  |  |
| MSRP | $1,139 | $1,029 | $949 |
|---|---|---|---|
| Spec Level | |||
| Where to Buy | — $1 At | — $1 At | — $1 At |
| Category | Trail | Crosscountry | Trail |
| Weight | 29.7 lbs | ||
| Frame | Aluminum | Aluminum | Aluminum |
| Fork | Suntour XCR 32 Air | RockShox Judy | Suntour XCM HLO |
| Wheels | Aluminum | Aluminum | Aluminum |
| Wheel Size | 27.5″ / 29″ | 27.5″ / 29″ | 27.5″ / 29″ |
| Brakes | Hydraulic Disc | Hydraulic Disc | Hydraulic Disc |
| Groupset | Deore, Shimano | Deore, FSA | microSHIFT Advent |
| Drivetrain | 1 × 12 | 1 × 10 | 1 × 9 |
| Suspension | Hardtail | Hardtail | Hardtail |
| Front Travel | 120mm | 100mm | 120mm |
| Seatpost | Rigid | Rigid | Rigid |
| Brand Site | polygonbikes.com | trekbikes.com | marinbikes.com |
| Summary | The Polygon XTRADA 7, Trek Marlin 7, and Marin Bobcat Trail 4 are all 27.5″ / 29″ aluminum frame hardtail mountain bikes. The Marlin 7 has a better fork, while the Bobcat Trail 4 has higher gearing. | ||
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For Bikes Like These
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more. Learn more →
| Frame | aluminum | Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR | Series 2 6061 Aluminum, 27.5" or 29” Wheels, Low Standover, 68mm BB shell, 135mm Forged Dropouts, IS Chainstay Disc Mount, Internal Housing & Dropper Post Routing |
|---|---|---|---|
| Fork | SR SUNTOUR XCR32 AIR LOR 120mm (27.5" & 29") TRAVEL | Size: XS, RockShox Judy, coil spring, preload, TurnKey lockout, 42mm offset for 27.5'' wheel, 100mm QR, 80mm travel; Size: S, RockShox Judy, coil spring, preload, TurnKey lockout, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel; Size: M, ML, L, XL, XXL, RockShox Judy, coil spring, preload, TurnKey lockout, 46mm offset for 29'' wheel, 100mm QR, 100mm travel | SR/Suntour XCM HLO-DS, 120mm Travel, Hydraulic Lockout, 46mm Offset |
| Rear Shock | - | ||
| Bottom Bracket | SHIMANO 2-PIECE CRANKSET BSA THREADED 73mm | FSA, 73mm, threaded cartridge, 122.5mm spindle | Sealed Cartridge Bearings, Square Taper |
| Headset | ZERO STACK (ZS) SEALED BEARING FOR TAPER HEAD TUBE, ZS 44/28.6 | ZS 56/40 | Semi-integrated, 1-1/8'' | FSA No.10-P |
| Stem | ENTITY XPERT ALLOY, EXT: 40mm, BAR BORE: 31.8mm, RISE/DROP: 7degree | Size: XS, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 50mm length; Size: S, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: M, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: ML, L, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 80mm length; Size: XL, XXL, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 90mm length | Marin Alloy, 31.8mm Clamp, 45mm |
| Handlebar | ENTITY XPERT ALLOY, W: 760mm, BAR BORE: 31.8mm, RISE/DROP: 12mm, BEND: 6degree | Size: XS, Bontrager alloy, 31.8mm, 5mm rise, 690mm width; Size: S, M, ML, L, XL, XXL, Bontrager alloy, 31.8mm, 5mm rise, 720mm width | Marin 31.8 Riser, 12mm Rise, 780mm Width |
| Saddle | ENTITY VOID, STEEL ø 7mm | Bontrager Arvada, steel rails, 138mm width | Marin MTB |
| Seatpost | ENTITY XPERT ALLOY, DXL: 27.2 x 350mm, SEAT CLAMP: 31.8mm W/ QR | Size: XS, S, M, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: ML, L, XL, XXL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length | Marin Alloy, 30.9 |
| Pedals | Nylon Platform | ||
| Grips | Bontrager XR Trail Comp, nylon lock-on | Marin MTB, Closed End |
| Rear Derailleur | SHIMANO DEORE RD-M6100-SGS DIRECT ATTACH | Shimano Deore M5120, long cage | microSHIFT Advent 9, Clutch |
|---|---|---|---|
| Front Derailleur | - | ||
| Crank | SHIMANO MT-510-1 BOOST 32T, 170mm (S, M) / 175mm (L, XL) | Size: XS, S, M, FSA Alpha Drive, 28T steel ring, Boost, 170mm length; Size: ML, L, XL, XXL, FSA Alpha Drive, 28T steel ring, Boost, 175mm length | Alloy Crank, Steel Narrow-Wide Chainring, 32T |
| Shifters | SHIMANO DEORE SL-M6100-R, 1x12-SPEED TRIGGER | Shimano Deore M4100, 10 speed | microSHIFT Advent 9 Trail |
| Cassette | 12 SPEED 11-51T | Shimano Deore M4100, 11-46, 10 speed | SunRace 9-Speed, 11-46T |
| Chain | KMC X-12 | KMC X10, 10 speed | KMC X9 |
| Brakes | SHIMANO MT-201 HYDRAULIC DISC BRAKES | Shimano MT200 hydraulic disc | Hydraulic Disc |
| Brake Levers | SHIMANO BL-MT201 | Tektro M275 Hydraulic |
| Rims | 584 / 622-30 32H FOR TYRE 584 / 622-54/76 TUBELESS READY | Bontrager Connection, double-wall, 32-hole, 20mm width, presta valve | Marin Aluminum Double Wall, 25mm Inner, Pinned Joint, Disc Specific |
|---|---|---|---|
| Spokes | 14g stainless steel | ||
| Front Hub | Formula DC-20, alloy, 6-bolt, 5x100mm QR | Forged Alloy, Disc, 32H | |
| Rear Hub | Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5mm QR | Forged Alloy, Disc, 32H | |
| Tires | WTB TRAIL BOSS COMP 27.5"x2.25" / 29"x2.25" | Size: XS, S, Bontrager XR2 Comp, wire bead, 30 tpi, 27.5x2.20''; Size: M, ML, L, XL, XXL, Bontrager XR2 Comp, wire bead, 30 tpi, 29x2.20'' | WTB Trail Boss Comp, 27.5/29x2.25, Wire Bead |
| Disk Rotors | SHIMANO SM-RT10 160mm CENTER-LOCK | Size: XS, S, M, ML, L, XL, XXL, Shimano RT26, 6-bolt,160mm; Size: L, XL, XXL, Shimano RT26, 6-bolt,180mm |