Trek Marlin 4 Mountain Bike 2026

Marlin 4 is a trail-worthy daily rider built for everything from weekday commutes to weekend adventures. It features a stable frame with a suspension fork to smooth rough paths, plus 8-speed Shimano ESSA shifting and mounts for racks and a kickstand. Whether you're rolling to class, work, or the trailhead, Marlin 4 brings the comfort and confidence of a commuter with the ruggedness of a real mountain bike. Frame Size: XXS , XS Alpha Silver Aluminum, curved top tube, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew Size: S , M , ML , L , XL Alpha Silver Aluminum, internal derailleur & dropper post routing, rack and kickstand mount, 135x5mm ThruSkew *Fork Size: XXS SR Suntour XCM 30, coil spring, preload, hydraulic lockout, 42mm offset for 26'' wheel, 100mm QR, 100mm travel Size: XS SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 80mm travel Size: S SR Suntour XCE 28, coil spring, preload, 42mm offset for 27.5'' wheel, 100mm QR, 100mm travel Size: M , ML , L , XL SR Suntour XCE 28, coil spring, preload, 46mm offset for 29'' wheel, 100mm QR, 100mm travel Hub front Formula DC-20, alloy, 6-bolt, 100x5mm Skewer front 116x5mm QR Hub rear Formula DC-22, alloy, 6-bolt, Shimano 8/9/10 freehub, 135x5mm Skewer rear 173x5mm QR Rim Bontrager Connection, double-wall, 32-hole, 20mm width, schrader valve Tire Size: XXS Bontrager Montrose Comp, wire bead, 30 tpi, 26x2.35'' Size: XS , S Bontrager Montrose Comp, wire bead, 30 tpi, 27.5x2.4'' Size: M , ML , L , XL Bontrager Montrose Comp, wire bead, 30 tpi, 29x2.4'' Shifter Shimano M315, 8 speed Rear derailleur Shimano ESSA U2000 Crank Size: XXS , XS ProWheel alloy, 30T narrow-wide steel ring, 160mm length Size: S , M , ML ProWheel alloy, 30T narrow-wide steel ring, 170mm length Size: L , XL ProWheel alloy, 30T narrow-wide steel ring, 175mm length Bottom bracket Threaded cartridge Cassette Shimano HG300, 11-45, 8 speed Chain KMC Z8.3, 8 speed Pedal nylon platform Saddle Bontrager Verse Short, stainless steel rails Seatpost Size: XXS Bontrager alloy, 31.6mm, 12mm offset, 300mm length Size: XS , S , M Bontrager alloy, 31.6mm, 12mm offset, 330mm length Size: ML , L , XL Bontrager alloy, 31.6mm, 12mm offset, 400mm length Handlebar Size: XXS , XS Bontrager alloy, 31.8mm, 5mm rise, 690mm width Size: S Bontrager alloy, 31.8mm, 15mm rise, 720mm width Size: M , ML , L , XL Bontrager alloy, 31.8mm, 15mm rise, 750mm width Grips Trek Line Comp, nylon lock-on Stem Size: XXS , XS , S Bontrager Comp, 31.8mm, 7 degree, 35mm length Size: M , ML , L Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length Size: XL Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length Headset Semi-integrated, 1-1/8'' Brake Size: XXS , XS , S Tektro HD-M276 hydraulic disc Size: XXS , XS , S , M , ML , L , XL Power BH-M286TF hydraulic disc, 160mm rotor Size: M , ML , L , XL Tektro HD-M275 hydraulic disc Size: M , ML , L , XL Power BH-M286TF hydraulic disc, 180mm rotor Brake rotor Size: XXS , XS , S , M , ML , L , XL Tektro, 6-bolt, 160mm Size: M , ML , L , XL Tektro, 6-bolt, 180mm Weight M - 14.90 kg / 32.85 lbs Weight limit This bike has a maximum total weight limit (combined weight of bicycle, rider, and cargo) of 300 pounds (136 kg). Trek may make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colors, materials, and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice. THIS PRODUCT CANNOT BE SHIPPED. YOU MUST COME TO OUR RETAIL STORE FOR DELIVERY