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The Marin Pioneer Trail 27.5" Hardtail Mountain Bike is the perfect balance of performance and versatility for trail enthusiasts. Its lightweight Series 1 aluminum frame is paired with an SR Suntour XCM DS fork with 100mm travel, delivering a smooth ride on rugged terrain. Featuring a reliable MicroSHIFT Acolyte drivetrain, hydraulic disc brakes, and tough alloy rims, this bike is ready for both beginner and intermediate riders seeking adventure on trails and paths.
Bottom bracket: | Sealed Cartridge Bearings, Square Taper |
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Brakes: | Clark's Clout Hydraulic Disc |
Cassette: | MicroSHIFT, 8-Speed, 11-42T |
Chain: | KMC X9 |
Colour: | ROARANGE |
Crankset: | Alloy Crank, Steel Narrow-Wide Chainring, 36T |
Derailleur rear: | MicroSHIFT Acolyte |
Fork: | SR Suntour XCM DS, 100mm Travel, Preload Adjustment, 46mm Offset |
Frame: | Series 1 6061 Aluminum, 27.5”/29" Wheels, Low Standover, 68mm BB shell, 135mm Forged Dropouts, Chainstay Mounted Disc Brakes |
Grip: | Marin MTB, Closed End |
Handlebar: | Marin 31.8 Riser, 12mm Rise, 740mm Width |
Handlebar stem: | Marin Alloy, 31.8mm, 45mm |
Headset: | FSA No.10-P |
Hubs: | F: Forged Alloy, Disc, 32H | R: Forged Alloy, Disc, 32H |
Pedals: | Nylon Platform |
Rim: | Marin, Double Wall Alloy |
Rotor front: | 160mm |
Rotor rear: | 160mm |
Saddle: | Marin MTB |
Season: | 2025 |
Seat post: | Marin Alloy, 27.2mm |
Spokes: | Black Stainless Steel |
Tyres: | MTB, 27.5/29x2.25" |
Wheel size: | 29" / 27.5" (Varies by Frame Size) |
Marin Pioneer Bike Sizing Chart

Marin Bikes are Made For Fun. Since the first mountain bikes bearing the Marin name debuted in 1986, the brand has been dedicated to enriching the lives of riders by making fun, high caliber bicycles, which provide years of riding enjoyment. They operate their business based on hard work, fueled by passion, and fulfilled by the satisfaction of bringing the joy of cycling to riders across the world.
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Please note, due to challenges in the product supply chain, bike specifications are subject to change without notice. Specifications listed below may not match exactly as shown in the photo.