Compare: 2021 Trek 820

Overview
Ride Feel
Gearing
Spec Level
Geometry
Specs

Bike Comparison

Only show differences

	8202021 Trek	Recommended Marlin 4 Gen 22024 Trek

MSRP	$439	$579
Where to Buy	— $1 At	$579 At Trek
Category	Crosscountry	Crosscountry
Weight	33.7 lbs	32.2 lbs
	1.9	2.4
Frame	Steel	Aluminum
Fork	Suntour	Suntour XCE
Wheels	Aluminum
Wheel Size	26″	27.5″ / 29″
Brakes	Rim	Mechanical Disc
Groupset	Tourney	Tourney, Altus
Drivetrain	3 × 7	2 × 7
Suspension	Hardtail	Hardtail
Front Travel	75mm	100mm
Brand Site	trekbikes.com	trekbikes.com
Summary	The Trek 820 is a 26″ steel frame hardtail crosscountry bike with mid-range components and rim brakes.

Similar Bikes

Accessories

Ride Feel

Based on frame geometry and build specs.

Terrain

easyextreme

Handling

nimblestable

2021 820

2024 Marlin 4 Gen 2

Other Crosscountry bikes

Gear Range

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

23 mph

2021 820

22 mph

2024 Marlin 4 Gen 2

Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Geometry

Specs

	8202021 Trek	Marlin 4 Gen 22024 Trek

Frame	Trek Custom Steel, rack mounts, 135x5mm QR Tire Clearance: 2" Color: Matte Trek Black	Size: XS, S, Alpha Silver Aluminum, curved top tube, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR; Size: M, ML, L, XL, Alpha Silver Aluminum, internal routing, chainstay disc brake mount, rack and kickstand mount, 135x5mm QR Tire Clearance: 2" Color: Matte Trek Black
Fork	SR Suntour M-3030, coil spring, 100x5mm QR, 75mm travel Travel: 100mm Spring Type: Coil	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 Travel: 100mm Spring Type: Coil
Bottom Bracket		VP BC73, 73mm, threaded cartridge
Headset	1-1/8'' threadless	Semi-integrated, 1-1/8''
Stem	Size: XS, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: S, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 80mm length; Size: M/L, L, Bontrager alloy, 31.8mm, Blendr compatible, 7 degree, 90mm length; Size: XL, Bontrager alloy, 31.8mm clamp, Blendr compatible, 7 degree, 100mm length	Size: XS, S, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 50mm length; Size: M, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 60mm length; Size: ML, L, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 70mm length; Size: XL, Bontrager Comp, 31.8mm, Blendr compatible, 7 degree, 80mm length
Handlebar	Size: XS, S, Bontrager alloy, 31.8mm, 15mm rise, 660mm width; Size: M/L, L, XL, Bontrager alloy, 31.8mm, 15mm rise, 690mm width	Size: XS, S, Bontrager alloy, 31.8mm, 5mm rise, 690mm width; Size: M, ML, L, XL, Bontrager alloy, 31.8mm, 15mm rise, 750mm width
Saddle	Bontrager Sport	Bontrager Verse Short, stainless steel rails
Seatpost	Size: XS, S, Bontrager alloy, 29.2mm, 12mm offset, 300mm length; Size: M/L, L, Bontrager alloy, 29.2mm, 12mm offset, 330mm length; Size: XL, Bontrager alloy, 29.2mm, 12mm offset, 400mm length	Size: XS, S, Bontrager alloy, 31.6mm, 12mm offset, 330mm length; Size: M, Bontrager alloy, 31.6mm, 12mm offset, 360mm length; Size: ML, L, XL, Bontrager alloy, 31.6mm, 12mm offset, 400mm length
Pedals	VP-536 nylon platform	VP-536 nylon platform
Grips	Bontrager SSR	Bontrager XR Endurance Comp, lock-on

Groupset

Rear Derailleur	Shimano Tourney TY300, long cage, 34T max cog	Shimano Tourney TY300
Front Derailleur	Shimano Tourney TY500, 31.8mm clamp, top swing, dual pull	Shimano Altus M315, 34.9mm clamp, top swing, dual pull
Crank	Shimano Tourney TY301, 42/34/24, 170mm length	Size: XS, S, M, ProWheel TM-CY10, 36/22, 170mm length; Size: ML, L, XL, ProWheel TM-CY10, 36/22, 175mm length
Shifters	Shimano Tourney EF41, 7 speed	Size: XS, S, M, ML, L, XL, Shimano EF500, 8 speed; Size: XS, S, M, ML, L, XL, Shimano EF500, 7 speed
Cassette	Shimano TZ500, 14-28, 7 speed	Shimano TZ500, 14-34, 7 speed
Chain	KMC Z7, 7 speed	KMC Z7, 7 speed
Brakes	Tektro alloy linear-pull	Size: XS, S, M, ML, L, XL, Tektro MD-M280 mechanical disc; Size: XS, S, M, ML, L, XL, Tektro MD-M281 mechanical disc

Wheels

Rims	Bontrager AT-550, alloy, 36-hole, schrader valve
Front Hub	Formula FM21 alloy, 100x5mm QR
Rear Hub	Formula FM31 alloy, 7sp freewheel, 135x5mm QR
Disc Rotors		Tektro, 6-bolt, 160mm

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