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
Value Guide market data · 2021 Trek Powerfly FS 4 Gen 2
12-month trend
12%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
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
2021 Powerfly FS 4 Gen 2 lineup
Overview
About this bike
2021 Trek Powerfly FS 4 Gen 2 value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- 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
- 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
- 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
- Frame Part
- RIB Alignment Plate for Bosch 625Wh BES2 & BES3; RIB Battery Mount Upper Frame Bracket; RIB Battery Mount Lower Frame Bracket
- 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
- 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.
- Suspension Part
- C WR
Drivetrain
- Groupset
- 2021 Trek Powerfly FS 4 Gen 2
- Chain
- KMC X10 10 Speed Chain
- 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)
- 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)
- 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)
- Crank
- FSA Crankarm for Bosch Gen4 165mm Black
- Derailleur Hanger
- SRAM Derailleur Hanger Universal Derailleur Hanger, with 30mm Diameter Washer for Trek ABP Full Suspension Models
- Chain Ring
- FSA Chainring 36t for Bosch Gen4 Motor Steel; FSA, 36T, Steel, Boost offset, for Bosch Gen4 motor, FSA part number WB349E03ZZEF01
Brakes
- Brake Rotor
- Tektro Disc Brake Rotor, TR203-24, 203mm, 6-Bolt, Silver
- Brake Pad
- Brake Pad, Shimano B-Series Shape : CONFIRM COMPATIBILITY BEFORE USE. BRAKE SPEC IS SUBJECT TO SUBSTITUTION AND MAY VARY.
- Brake Set
- Tektro HD-M275 hydraulic disc; Tektro HD-M275 Hydraulic Disc Brake Rear, 1700mm hose length
Cockpit
- 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.
- Stem
- Bontrager Blendr Stem, 31.8x60mm, 7 Degree Rise, Black
- Grips
- Bontrager Grips XR Trail Comp Black
- 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
- 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
- Miscellaneous Tape
- Foam Tape Adhesive 25 x 13 x 1.5mm. Black
Wheels & Tires
- 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
- Spokes
- 14g Stainless, Black
- Nipple
- NIPPLE TREK APPROVED, 14G 12MM BRASS BLACK FINISH
- Rim
- Alex MD35 Rim, 27.5'' 32h Disc, Presta, Black
- Rim Strip
- TLR Tape 21mm wide
- Tire
- Bontrager Tire XR3 Comp 27.5x2.35
- Tube
- Maxxis innertube, 48mm Presta valve, 27.5x1.75-2.4''
- Rear Skewer
- Bontrager ''Switch'' 12mm Thru Axle, Removable Lever, M12 Thread, 184.5mm Length, Black
- Hub Body
- DC-3248 Shimano ATB Freehub with double-row bearing
Pedals
- Pedal
- VP Pedals 536C Platform Style, Black
E-System
- Battery
- Bosch, PowerTube 500 Battery, ''Vertical'' Style, BOSCH P/N: 0275.007.542
- Charger
- Bosch, Compact Charger, 2A (100-240V), BOSCH P/N: 0275.007.915
- Motor
- Bosch Drive Unit, Performance CX, Gen 4, BOSCH P/N: 0275.007.075
- 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
- 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
Accessories
- Color
- Orange_Grey; Grey_Black; Purple_Black; Red_Greydark
- Cable Housing Set
- Bontrager Shift Housing 4mm Diameter, Black
- Decal
- Stick-On Trek Shield Headtube Badge, Black
- Seat Collar
- Bontrager Seatpost Collar 36.4 Black
- Touch-Up Paint
- Paint Color: Matte Metallic Gunmetal, TK202-M; Paint Color: Matte Trek Black, TK001-S
- Armor
- Trek Armor Rail 29 2020 Motor Armor Black; Trek Armor Rail 29 2020 Chainstay Armor Black
- Bar End Plug
- Bontrager Bar End Plug
- 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
- 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
- Fender
- Rear fender, Powerfly FS 29'', black
- Computer
- Bosch, Purion Display, 1500mm Cable, BOSCH P/N: 1270.020.917
- Bell
- Trek Dome-Style Bell, Silver/Black
- 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
- 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
- Lock
- ABUS Lock Core for Internal Powertube Battery
- Lock Part
- RIB Battery Eject Plunger MTB
Frame sizing
XS4'10"-5'2"
S5'2"-5'6"
M5'6"-5'10"
L5'10"-6'2"
XL6'2"-6'6"
M highlighted as most common resale size. Sourced from catalog metadata.
Geometry
- Stack
- Varies by size
- Reach
- Varies by size
- Wheelbase
- Varies by size
Industry standard. Sourced from catalog metadata.
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Wheel condition
Inspect rims, hubs, spokes, and bearing play; ask about the tire age and any prior wheel rebuilds.
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 and any diagnostic report; older packs lose range and capacity.
Inspection
Motor warranty
Verify motor warranty status and any firmware updates from the manufacturer dealer.