Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Trek
2021 Trek Powerfly FS 4 Gen 2
Previous used estimate
$1,609 - $1,655
Actual value depends on condition, size, and local demand.
Value Guide market data · 2021 Trek Powerfly FS 4 Gen 2
12-month projected trend
12%
Direction and magnitude, not judgment
vs. category average
2%
Drops faster than category avg
Price over time - 2021 Trek Powerfly FS 4 Gen 2
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Powerfly model years
Overview
About this bike
Powerfly FS 4 is a full suspension electric mountain bike built to tackle rugged trail adventures. The plush suspension setup soaks up rough terrain, and the powerful Bosch electric drive system boosts your capacity to crush climbs and mile after mile of singletrack.
Specifications
- Subtype
- Electric Mountain
- Category
- E-Bike
- Component Rim
- Alex MD35 Rim, 27.5'' 32h Disc, Presta, Black
- Component Bell
- Trek Dome-Style Bell, Silver/Black
- Component Fork
- SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 41mm offset, oversized crown for eMTB, Boost110, 15mm bolt-on thru axle, 100mm travel
- Component Lock
- ABUS Lock Core for Internal Powertube Battery
- Component Stay
- Trek Chainstay Powerfly 29 2021 Aluminum, 148x12 OLD, Paint Match Matte Metallic Gunmetal and Matte Trek Black; Trek Seatstay Powerfly 29 2021 Aluminum, 148x12 OLD, Paint Match Matte Trek Black
- Component Stem
- Bontrager Blendr Stem, 31.8x60mm, 7 Degree Rise, Black
- Component Tire
- Bontrager Tire XR3 Comp 27.5x2.35
- Component Tube
- Maxxis innertube, 48mm Presta valve, 27.5x1.75-2.4''
- Product Family
- Powerfly
- Component Armor
- Trek Armor Rail 29 2020 Motor Armor Black; Trek Armor Rail 29 2020 Chainstay Armor Black
- Component Chain
- KMC X10 10 Speed Chain
- Component Color
- Orange_Grey; Grey_Black; Purple_Black; Red_Greydark
- Component Cover
- Trek Cover (Battery) Powerfly 29 2021 Aluminum, 625 Watt, Paint Match Matte Metallic Gunmetal and Matte Trek Black; Battery Charge Port Cover Assembly, Black
- Component Crank
- FSA Crankarm for Bosch Gen4 165mm Black
- Component Decal
- Stick-On Trek Shield Headtube Badge, Black
- Component Frame
- Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, internal routing, Motor Armor, magnesium rocker link, rack and fender mount, ABP, Boost148, 100mm travel
- Component Grips
- Bontrager Grips XR Trail Comp Black
- Component Motor
- Bosch Drive Unit, Performance CX, Gen 4, BOSCH P/N: 0275.007.075
- Component Pedal
- VP Pedals 536C Platform Style, Black
- Component Shock
- SR Suntour Edge R, 190mm x 45mm, 20mm x 8mm Pin Mount Upper, 20mm x 8mm Pin Mount Lower, External Rebound adjust only, no lockout or compression
- Component Fender
- Rear fender, Powerfly FS 29'', black
- Component Nipple
- NIPPLE TREK APPROVED, 14G 12MM BRASS BLACK FINISH
- Component Saddle
- Bontrager Saddle Arvada Steel Rails Medium Black
- Component Spacer
- Headset Spacer, 10mm 1-1/8in, Black; Trek Main Pivot Frame Spacer, 22mm OD x 17mm ID x 3mm Thick; Washer, Flat M5, OD: 10mm, 1mm thickness; Suspension Part, Washer, 16mm OD / 10mm ID / 3mm Thickness
- Component Spokes
- 14g Stainless, Black
- Component Battery
- Bosch, PowerTube 500 Battery, ''Vertical'' Style, BOSCH P/N: 0275.007.542
- Component Bearing
- FSA Headset Bearing, MR122, 1-1/8in; FSA Headset Bearing, MR127, 1.5in; Trek Sealed Cartridge Main Pivot Bearing 3803 2RS Double Lipped, 17mm ID, x 26mm OD, x 10mm Thick, Reference Service Manual for quantity and installation information; Trek Sealed Cartridge Seatstay Pivot Bearing, Double Row, 10mm ID, x 19mm OD, x 8mm Thick, Reference Service Manual for quantity and installation information; Trek Rocker Pivot Bearing, Double Row, 12mm ID x 21mm OD x 8mm Thick, Trek Rear Suspension Fastener M10x1x20mm Reference Service Manual for quantity and installation information
- Component Charger
- Bosch, Compact Charger, 2A (100-240V), BOSCH P/N: 0275.007.915
- Component Headset
- FSA Headset IS-2/62/42E/ACB with Oversized Top Bearing Cover for Trek Powerfly FS 2021, Standard 1.5 lower bearing and race, standard 1-1/8'' upper bearing and compression ring, black oversized bearing cover sold separately.
- Component Shifter
- Shimano Deore Shifter. Item Number: SL-M4100-R, 10-Speed, Rapidfire Plus, Inner Cable Length: 2050mm, Without Optical Gear Display. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Component Cassette
- Shimano Deore Cassette. Item Number: CS-M4100, 10-Speed, 11-13-15-18-21-24-28-32-37-46T. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Component Computer
- Bosch, Purion Display, 1500mm Cable, BOSCH P/N: 1270.020.917
- Component Fastener
- Trek Fastener M5x0.8x10mm; Derailleur Hanger Bolt, M3x0.5x12; Nut, M5 x 0.8 For Battery Mount Baseplate; Bolt, M5 x 0.8 x 16mm, For Battery Lock; Bolt, M4 x 0.7 x 8mm, For Battery Lock; Bolt M5x0.8x15, Flat head T-25, Tamper Resistant, 316SS, Matte Black Isonite Finish; Washer, oversized for RIB Abus lock, 15mm OD, 2mm thick; Trek Main Pivot Nut, D-Shaped, M17; Trek Powerfly FS 2021 Main Pivot Hardware Kit; Bosch, Drive Unit Screw, M8 x 16mm, BOSCH P/N: 1270.016.470
- Component Hub Body
- DC-3248 Shimano ATB Freehub with double-row bearing
- Component Rear Hub
- Bontrager DC-3248 alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru axle
- Component Seatpost
- TransX 100mm Dropper Post, 361mm Length, 80mm Min Insertion
- Component Brake Pad
- Brake Pad, Shimano B-Series Shape : CONFIRM COMPATIBILITY BEFORE USE. BRAKE SPEC IS SUBJECT TO SUBSTITUTION AND MAY VARY.
- Component Brake Set
- Tektro HD-M275 hydraulic disc; Tektro HD-M275 Hydraulic Disc Brake Rear, 1700mm hose length
- Component Front Hub
- Formula DC711 Front Hub, 32h, 15x110mm (Boost), 6-Bolt Disc
- Component Handlebar
- Bontrager Approved Lowriser, 31.8x720mm, 15mm Rise, 9D Bend/4D Upsweep, Black
- Component Lock Part
- RIB Battery Eject Plunger MTB
- Component Rim Strip
- TLR Tape 21mm wide
- Component Chain Ring
- FSA Chainring 36t for Bosch Gen4 Motor Steel; FSA, 36T, Steel, Boost offset, for Bosch Gen4 motor, FSA part number WB349E03ZZEF01
- Component Ebike Part
- Bosch Integrated Speed Sensor Cable Assembly, 3mm Cable, 750mm length; Bosch, Front Light Cable, 1400mm, BOSCH P/N: 1270.020.322; E-Bike Part Integrated Speed Sensor Magnet; Trek-Diamant RIB Assembly Bosch Upper Lock Cover, compatible with both Smart System and non-Smart System assemblies, Black; Trek-Diamant RIB Assembly Upper Lock Cover Bumpers, compatible across all Trek-Diamant RIB assemblies, Black, Pair; Trek Integrated Bosch Battery Lock Covers Kit; RIB Lock Cover
- Component Frame Part
- RIB Alignment Plate for Bosch 625Wh BES2 & BES3; RIB Battery Mount Upper Frame Bracket; RIB Battery Mount Lower Frame Bracket
- Component Motor Part
- Bosch Logo Bezel, Performance CX, BOSCH P/N: 0275.008.334; Bosch Lock Ring for Chainring, Performance Line, Gen 4, BOSCH P/N: 1270.014.085; Bosch, O-Ring for Chainring Lockring, For Bosch Performance Line, Gen 4, BOSCH P/N: 1270.016.119; Bosch Lockring for Performance Line & Performance Line CX. BOSCH P/N: EB11.200.0JH
- Component Brake Rotor
- Tektro Disc Brake Rotor, TR203-24, 203mm, 6-Bolt, Silver
- Component Electronics
- GILS Headlight Cable, 26AWG, 3mm OD; EBike Integrated Speed Sensor Magnet Holder, For 6B Rotor; EBike Integrated Speed Sensor Magnet, 0.25''OD 0.375''Length, N42, High Temp
- Component Power Cable
- Bosch, Charger Power Cable, US, BOSCH P/N: 1270.020.343; Bosch, PowerTube Cable, 410mm, BOSCH P/N: 1270.016.515; Bosch, PowerTube Charging Socket, 340mm Cable, BOSCH P/N: 0275.007.444
- Component Rear Skewer
- Bontrager ''Switch'' 12mm Thru Axle, Removable Lever, M12 Thread, 184.5mm Length, Black
- Component Seat Collar
- Bontrager Seatpost Collar 36.4 Black
- Component Bar End Plug
- Bontrager Bar End Plug
- Component Battery Part
- Trek-Diamant RIB Assembly Bosch Lower Charge Dock Cover, not Smart System compatible, Black; Trek Frame Part RIB Charge Port Door, Mounts to Seat Tube above Motor for Bosch Gen4 Motor Systems; Bosch, Charging Socket O-ring, BOSCH P/N: 1270.016.109
- Component Headset Part
- FSA Compression Ring, FSA p/n H2048; FSA 1.5'' Crown Race, FSA p/n H6083; Bontrager Headset Topcap, w/ Star Nut, Black
- Component Frame Fitting
- RIB Battery Mount Upper Baseplate; RIB Battery Mount Lower Baseplate. 15mm Thickness.; RIB Battery Mount Lower Baseplate. 14.5mm Thickness.
- Component Touch Up Paint
- Paint Color: Matte Metallic Gunmetal, TK202-M; Paint Color: Matte Trek Black, TK001-S
- Component Rear Derailleur
- Shimano Deore Derailleur Rear. Item Number: RD-M5120, 11-Speed, Direct Attachment, SGS Cage, Max 46T, Shadow Plus design. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Component Suspension Link
- Trek Rocker Link Powerfly 29 2021 Aluminum, Gloss Metallic Gunmetal
- Component Suspension Part
- C WR
- Component Cable Management
- Trek Internal Cable Guide, RIB Downtube, Secures up to 6 Housing, Controller, or Light Cables; Quad Freak for 2 Wires and 2 Cables With Larger Hole for 5.5mm Brake Hose
- Component Cable Housing Set
- Bontrager Shift Housing 4mm Diameter, Black
- Component Derailleur Hanger
- SRAM Derailleur Hanger Universal Derailleur Hanger, with 30mm Diameter Washer for Trek ABP Full Suspension Models
- Component Miscellaneous Tape
- Foam Tape Adhesive 25 x 13 x 1.5mm. Black
- Chain
- KMC X10 10 Speed Chain
- Seatpost
- TransX 100mm Dropper Post, 361mm Length, 80mm Min Insertion
- Saddle
- Bontrager Saddle Arvada Steel Rails Medium Black
- Handlebar
- Bontrager Approved Lowriser, 31.8x720mm, 15mm Rise, 9D Bend/4D Upsweep, Black
- Headset
- FSA Headset IS-2/62/42E/ACB with Oversized Top Bearing Cover for Trek Powerfly FS 2021, Standard 1.5 lower bearing and race, standard 1-1/8'' upper bearing and compression ring, black oversized bearing cover sold separately.
- Rear Derailleur
- Shimano Deore Derailleur Rear. Item Number: RD-M5120, 11-Speed, Direct Attachment, SGS Cage, Max 46T, Shadow Plus design. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Stem
- Bontrager Blendr Stem, 31.8x60mm, 7 Degree Rise, Black
- Cassette
- Shimano Deore Cassette. Item Number: CS-M4100, 10-Speed, 11-13-15-18-21-24-28-32-37-46T. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Fork
- SR Suntour XCR 34, air spring, LO R damper, hydraulic lockout, tapered steerer, 41mm offset, oversized crown for eMTB, Boost110, 15mm bolt-on thru axle, 100mm travel
- Frame
- Alpha Platinum Aluminum, Removable Integrated Battery (RIB), tapered head tube, internal routing, Motor Armor, magnesium rocker link, rack and fender mount, ABP, Boost148, 100mm travel
- Front Hub
- Formula DC711 Front Hub, 32h, 15x110mm (Boost), 6-Bolt Disc
- Rear Hub
- Bontrager DC-3248 alloy, sealed bearing, alloy axle, 6-bolt, Shimano 8/9/10 freehub, Boost148, 12mm thru axle
- Shifter
- Shimano Deore Shifter. Item Number: SL-M4100-R, 10-Speed, Rapidfire Plus, Inner Cable Length: 2050mm, Without Optical Gear Display. (Visit si.shimano.com for compatibility, manuals and exploded views)
- Motor
- Bosch Drive Unit, Performance CX, Gen 4, BOSCH P/N: 0275.007.075
- Charger
- Bosch, Compact Charger, 2A (100-240V), BOSCH P/N: 0275.007.915
- Battery
- Bosch, PowerTube 500 Battery, ''Vertical'' Style, BOSCH P/N: 0275.007.542
- Color
- Orange_Grey; Grey_Black; Purple_Black; Red_Greydark
- Spokes
- 14g Stainless, Black
- Cable Housing Set
- Bontrager Shift Housing 4mm Diameter, Black
- Crank
- FSA Crankarm for Bosch Gen4 165mm Black
- Decal
- Stick-On Trek Shield Headtube Badge, Black
- Grips
- Bontrager Grips XR Trail Comp Black
- Nipple
- NIPPLE TREK APPROVED, 14G 12MM BRASS BLACK FINISH
- Pedal
- VP Pedals 536C Platform Style, Black
- Rim
- Alex MD35 Rim, 27.5'' 32h Disc, Presta, Black
- Rim Strip
- TLR Tape 21mm wide
- Seat Collar
- Bontrager Seatpost Collar 36.4 Black
- Tire
- Bontrager Tire XR3 Comp 27.5x2.35
- Touch-Up Paint
- Paint Color: Matte Metallic Gunmetal, TK202-M; Paint Color: Matte Trek Black, TK001-S
- Tube
- Maxxis innertube, 48mm Presta valve, 27.5x1.75-2.4''
- Armor
- Trek Armor Rail 29 2020 Motor Armor Black; Trek Armor Rail 29 2020 Chainstay Armor Black
- Bar End Plug
- Bontrager Bar End Plug
- Bearing
- FSA Headset Bearing, MR122, 1-1/8in; FSA Headset Bearing, MR127, 1.5in; Trek Sealed Cartridge Main Pivot Bearing 3803 2RS Double Lipped, 17mm ID, x 26mm OD, x 10mm Thick, Reference Service Manual for quantity and installation information; Trek Sealed Cartridge Seatstay Pivot Bearing, Double Row, 10mm ID, x 19mm OD, x 8mm Thick, Reference Service Manual for quantity and installation information; Trek Rocker Pivot Bearing, Double Row, 12mm ID x 21mm OD x 8mm Thick, Trek Rear Suspension Fastener M10x1x20mm Reference Service Manual for quantity and installation information
- Brake Rotor
- Tektro Disc Brake Rotor, TR203-24, 203mm, 6-Bolt, Silver
- Cable Management
- Trek Internal Cable Guide, RIB Downtube, Secures up to 6 Housing, Controller, or Light Cables; Quad Freak for 2 Wires and 2 Cables With Larger Hole for 5.5mm Brake Hose
- Cover
- Trek Cover (Battery) Powerfly 29 2021 Aluminum, 625 Watt, Paint Match Matte Metallic Gunmetal and Matte Trek Black; Battery Charge Port Cover Assembly, Black
- Derailleur Hanger
- SRAM Derailleur Hanger Universal Derailleur Hanger, with 30mm Diameter Washer for Trek ABP Full Suspension Models
- Fastener
- Trek Fastener M5x0.8x10mm; Derailleur Hanger Bolt, M3x0.5x12; Nut, M5 x 0.8 For Battery Mount Baseplate; Bolt, M5 x 0.8 x 16mm, For Battery Lock; Bolt, M4 x 0.7 x 8mm, For Battery Lock; Bolt M5x0.8x15, Flat head T-25, Tamper Resistant, 316SS, Matte Black Isonite Finish; Washer, oversized for RIB Abus lock, 15mm OD, 2mm thick; Trek Main Pivot Nut, D-Shaped, M17; Trek Powerfly FS 2021 Main Pivot Hardware Kit; Bosch, Drive Unit Screw, M8 x 16mm, BOSCH P/N: 1270.016.470
- Frame Part
- RIB Alignment Plate for Bosch 625Wh BES2 & BES3; RIB Battery Mount Upper Frame Bracket; RIB Battery Mount Lower Frame Bracket
- Headset Part
- FSA Compression Ring, FSA p/n H2048; FSA 1.5'' Crown Race, FSA p/n H6083; Bontrager Headset Topcap, w/ Star Nut, Black
- Rear Skewer
- Bontrager ''Switch'' 12mm Thru Axle, Removable Lever, M12 Thread, 184.5mm Length, Black
- Spacer
- Headset Spacer, 10mm 1-1/8in, Black; Trek Main Pivot Frame Spacer, 22mm OD x 17mm ID x 3mm Thick; Washer, Flat M5, OD: 10mm, 1mm thickness; Suspension Part, Washer, 16mm OD / 10mm ID / 3mm Thickness
- Fender
- Rear fender, Powerfly FS 29'', black
- Brake Pad
- Brake Pad, Shimano B-Series Shape : CONFIRM COMPATIBILITY BEFORE USE. BRAKE SPEC IS SUBJECT TO SUBSTITUTION AND MAY VARY.
- Computer
- Bosch, Purion Display, 1500mm Cable, BOSCH P/N: 1270.020.917
- Chain Ring
- FSA Chainring 36t for Bosch Gen4 Motor Steel; FSA, 36T, Steel, Boost offset, for Bosch Gen4 motor, FSA part number WB349E03ZZEF01
- Bell
- Trek Dome-Style Bell, Silver/Black
- Power Cable
- Bosch, Charger Power Cable, US, BOSCH P/N: 1270.020.343; Bosch, PowerTube Cable, 410mm, BOSCH P/N: 1270.016.515; Bosch, PowerTube Charging Socket, 340mm Cable, BOSCH P/N: 0275.007.444
- Battery Part
- Trek-Diamant RIB Assembly Bosch Lower Charge Dock Cover, not Smart System compatible, Black; Trek Frame Part RIB Charge Port Door, Mounts to Seat Tube above Motor for Bosch Gen4 Motor Systems; Bosch, Charging Socket O-ring, BOSCH P/N: 1270.016.109
- Ebike Part
- Bosch Integrated Speed Sensor Cable Assembly, 3mm Cable, 750mm length; Bosch, Front Light Cable, 1400mm, BOSCH P/N: 1270.020.322; E-Bike Part Integrated Speed Sensor Magnet; Trek-Diamant RIB Assembly Bosch Upper Lock Cover, compatible with both Smart System and non-Smart System assemblies, Black; Trek-Diamant RIB Assembly Upper Lock Cover Bumpers, compatible across all Trek-Diamant RIB assemblies, Black, Pair; Trek Integrated Bosch Battery Lock Covers Kit; RIB Lock Cover
- Electronics
- GILS Headlight Cable, 26AWG, 3mm OD; EBike Integrated Speed Sensor Magnet Holder, For 6B Rotor; EBike Integrated Speed Sensor Magnet, 0.25''OD 0.375''Length, N42, High Temp
- Motor Part
- Bosch Logo Bezel, Performance CX, BOSCH P/N: 0275.008.334; Bosch Lock Ring for Chainring, Performance Line, Gen 4, BOSCH P/N: 1270.014.085; Bosch, O-Ring for Chainring Lockring, For Bosch Performance Line, Gen 4, BOSCH P/N: 1270.016.119; Bosch Lockring for Performance Line & Performance Line CX. BOSCH P/N: EB11.200.0JH
- Hub Body
- DC-3248 Shimano ATB Freehub with double-row bearing
- Brake Set
- Tektro HD-M275 hydraulic disc; Tektro HD-M275 Hydraulic Disc Brake Rear, 1700mm hose length
- Shock
- SR Suntour Edge R, 190mm x 45mm, 20mm x 8mm Pin Mount Upper, 20mm x 8mm Pin Mount Lower, External Rebound adjust only, no lockout or compression
- Stay
- Trek Chainstay Powerfly 29 2021 Aluminum, 148x12 OLD, Paint Match Matte Metallic Gunmetal and Matte Trek Black; Trek Seatstay Powerfly 29 2021 Aluminum, 148x12 OLD, Paint Match Matte Trek Black
- Suspension Link
- Trek Rocker Link Powerfly 29 2021 Aluminum, Gloss Metallic Gunmetal
- Frame Fitting
- RIB Battery Mount Upper Baseplate; RIB Battery Mount Lower Baseplate. 15mm Thickness.; RIB Battery Mount Lower Baseplate. 14.5mm Thickness.
- Lock
- ABUS Lock Core for Internal Powertube Battery
- Lock Part
- RIB Battery Eject Plunger MTB
- Miscellaneous Tape
- Foam Tape Adhesive 25 x 13 x 1.5mm. Black
- Suspension Part
- C WR
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Battery health
Request battery cycle count, capacity diagnostics, and motor service records.