Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Marin
2021 Marin Alcatraz
Value Guide market data · 2021 Marin Alcatraz
12-month trend
13%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2021 Marin Alcatraz
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Alcatraz model years
2021 Alcatraz lineup
Overview
About this bike
2021 Marin Alcatraz value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Frame
- Series 3 6061 Aluminum Frame, 26” Wheels, 135x10mm Horizontal Dropouts, 73mm Threaded BB, ISCG 05 Tabs
- Fork
- X Fusion Slant RL2 26", 100mm Travel, 100x15mm Thru-Axle, Air Spring, Compression and Rebound Adjust, Tapered Alloy Steerer tube, 40mm Offset
Drivetrain
- Groupset
- 2021 Marin Alcatraz
- Crankset
- Marin Forged Alloy, Alloy 32T Chainring, 104mm BCD
- Bottom Bracket
- External Sealed Cartridge Bearings
- Chain
- KMC HL-710
- Cassette
- 14T Single Speed Cog
- Chainrings
- Alloy 32T
Brakes
- Brake Levers
- Tektro HDM275
- Brake, Front
- Tektro HDM275 Hydraulic Disc Brake, 160mm Rotor
- Brake, Rear
- Tektro HDM275 Hydraulic Disc Brake, 160mm Rotor
- Brakes
- Tektro HDM275 Hydraulic, 160mm Rotors
Cockpit
- Handlebar
- Marin Riser, 6061 Double Butted Aluminum, 38mm Rise, 750mm Width, 4º Up, 9º Back
- Stem
- Marin 3D Forged Alloy, 40mm
- Grips
- Marin Single Clamp Locking
- Headset
- FSA No 57E, Semi-Sealed Cartridge Bearings, 1 1/8" x 1 1/2”
- Seatpost
- Marin Pivotal DJ, 30.9mm
- Saddle
- Marin Pivotal DJ Saddle
- Handlebar Width
- 780
- Stem Length
- 35
Wheels & Tires
- Rims
- Marin Custom Extrusion, 27mm Inner, Pinned Joint
- Tires
- Vee Tire, XCV 26x2.25”, LSG Compound, Wire Bead
- Hub, Rear
- Forged Alloy, 135x10mm, Bolt-On, Quad Sealed Bearings, 32H
- Hub, Front
- Forged Alloy, 100x15mm, 32H
- Spoke, Nipples
- 14g Black Stainless Steel
- Axles
- Front: 15 x 100mm thru-axle, Rear: 135mm Bolt On
- Front Tire
- Vee Tire, XCV 26x2.25", LSG Compound, Wire Bead
- Hubs
- Front: Forged Alloy, 6-bolt Disc, 32H, Rear: Forged Alloy, Quad Sealed Bearings, 6-Bolt Disc, 32H
- Spokes
- 14g Black Stainless Steel
Pedals
- Pedals
- Alloy Platform
Accessories
- Extras
- Marin Chain Tension Device
- AStack
- 575.5
- BReach
- 401.84
- CHeadtube Angle
- 69°
- DHeadtube Length
- 115
- ESeattube Angle
- 71°
- FSeattube Length
- 320
- GToptube Effective
- 600
- HBB Height
- 317
- IBB Drop
- 22
- JChainstay
- 395
- KWheelbase
- 1053.68
- LStandover Height
- 650
- MFork Offset
- 42
- Accessories & Extras
- Marin Chain Tension Device
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
Suspension service
Confirm fork lowers and rear shock service intervals; ask for the most recent service receipts.
Inspection
Frame pivots & bearings
Cycle the suspension off the bike to feel for play, grit, or noise in pivot bearings.