With the Powerfly 4 625 you get our most affordable electric mountain bike, powered with a 625 watt-hour battery. In addition, you can still count on our RIB (Removable Integrated Battery) system, which allows you to remove and reinstall the battery easily, and take advantage of all the features that make the Powerfly 4 the ideal choice to discover the beauty of pedal assistance on the road. You are enthusiastic about the e-bike revolution and you want the efficiency and versatility of a mountain bike at a different price than the car you are trying to use less and less. You want to experience new off-road adventures and you know that an e-MTB equipped with the latest and easy-to-use technologies is the best way to make your dream come true.The technology you get Strong yet stylish aluminum frame that fully encloses a 625Wh long-range battery for maximum aesthetics, Bosch Performance CX motor (250W, 85Nm) with assistance up to 25km / h, Ergonomic Purion controller, Shimano 1x10 drivetrain, SR Suntour XCM da fork with lockout and hydraulic disc brakes. In addition, the Smart Wheel Size philosophy allows you to mount the most suitable wheel for cyclists of all sizes (29 "wheels on the larger frames, 27.5" wheels on the smaller frames). The final word This model has a battery with Longer life than the standard Powerfly 4, for unlimited fun. That's why you'll love Trek's excellent RIB (Removable Integrated Battery) system extremely intuitive: it completely conceals the battery in the frame to protect it and makes it easy to remove without using any tool. In addition to this, it allows you to mount a bottle cage This bike expands your boundaries: the high-performance Bosch system ideal for everyday rides, leisure and trail fun The Purion controller includes intelligent Walk Assist and eMTB modes, which ensure automatically the right energy contribution based on the terrain equipped with an external port that facilitates charging, both with the battery mounted and with the battery removed from the bike You can add a luggage rack and mudguards to your Powerfly. Plus, integrated wiring allows you to easily install engine powered lights. Specifications * Specifications apply to all sizes unless otherwise specified Frame Kit Frame Alpha Platinum Aluminum, Removable Integrated Battery (RIB), Tapered Headtube, Control Freak Internal Cable Routing, engine guard, Boost148 * ForkSize: XSSR Suntour XCM 34, coil spring, preload, lockout, tapered steerer tube, 44mm offset, Boost110, 15mm thru axle, 80mm travelSize: S, M, L, XLSR Suntour XCM 34, coil spring, preload, lockout, tapered steerer tube, 44mm offset, Boost110, 15mm thru axle, 120mm travel Wheels Front hub Formula DC-511, 6 bolt, Boost110, 15mm thru axle Rear hub Bontrager alloy, sealed bearing, alloy axle, 6 bolt, Shimano 8 freewheel / 9/10, Boost148, 12mm thru axle Rim Bontrager Connection, double chamber, 32 holes, 20mm width, PrestaRaggi valve Stainless steel 14g, b lack * Tire Size: XS, SBontrager XR3 Comp, cord bead, 30 tpi, 27.5x2.35 "Size: M, L, XLBontrager XR3 Comp, cord bead, 30tpi, 29x2.30" Size: M, L, XLBontrager XR3 Comp, wire bead, 30 tpi, 29x2.30 "Drivetrain Shifter Shimano Deore M4100, 10 speed Rear derailleur Shimano Deore M5120, long cage Crankset FSA Bosch CK-220, 36T chainring, length 165mm Cassette Shimano Deore M4100, 11-46, 10 speed nylon chain, 10KM pedal, X10 platform VP-536 Components Saddle Bontrager Commuter Comp * SeatpostSize: XS, SLega Bontrager, 31.6mm, offset 12mm, length 330mmSize: MLega Bontrager, 31.6mm, offset 12mm, length 360mmSize: L, XLega Bontrager, 31.6mm, offset 12mm, length 400mm * Handlebar Size: XS, SLega Bontrager, 31.8mm, 15mm rise, 720mm width Size: M, L, XL Alloy Bontrager, 31.8mm, 15mm rise, 750mm width Handlebar Bontrager XR Endurance Comp * Stem Size: XS Alloy Bontrager, 31.8mm, Blendr compatible , 7 degree, length 50mmSize: S, MLega Bontrager, 31.8mm, Blendr compatible, 7 degree, 60mm lengthSize: L, XL Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 70mm lengthSteering series FSA IS-2, 1-1 / 8 "upper, 1.5" lower BrakeTektro HD-M275 hydraulic discBrake rotorTektro, 203mm, 6 boltAccessoriesBatteryBosch PowerTube 625ChargerBosch compact charger 2A (100-240V) WeightWeightM - 23.67 kg / 52.18 lbs (With tubes) Weight Limit , rider and load) of 136kg (300lbs).