Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Redline
2021 Redline Monocog
Value Guide market data · 2021 Redline Monocog
12-month trend
11%
Direction and magnitude, not judgment
vs. category average
— %
No category comparison available
Price over time - 2021 Redline Monocog
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All Monocog model years
2021 Monocog lineup
Overview
About this bike
2021 Redline Monocog value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Chromoly Disc
- Frame
- Full Chromoly Disc
Drivetrain
- Groupset
- 2021 Redline Monocog
- Crankset
- Proline 2pc Alloy Forged Cranks 175mm w/24mm Chromo Spindle
- Bottom Bracket
- Sealed External Euro
- Chain
- KMC Z33
- Chainrings
- Alloy, 104 BCD, 32t
- Cassette/Freewheel
- 18t
Brakes
- Brake Levers
- Tektro ML520
- Brakes
- Tektro MD-M300, Mechanical Disc, 160mm Rotor
Cockpit
- Seatpost
- Alloy, 26.8 x 350mm
- Saddle
- Redline MTB
- Handlebar
- Alloy, 740mm Wide, 15mm Rise, 9 Deg Back, 5 Deg Up, 35mm
- Headset
- FSA Impact Integrated 1 1/8"
- Stem
- Alloy, 3D Forged, 40mm, 35mm Bar Bore
- Tape/Grips
- Redline Monster 151, No Flange
Wheels & Tires
- Hubs
- Front: Formula Alloy Disc, QR, 32h<br>Rear: Formula Alloy Disc, Cassette Spaced for Single Speed, Nutted, 32h
- Rims
- Alloy DDM-2 Double Wall, Disc
- Rear Tire
- Vee Rubber, 29 x 2.25
- Spokes
- 14g Stainless Steel
- Front Tire
- Vee Rubber, 29 x 2.25
Pedals
- Pedals
- Monster PC, Sealed Bearing, Ultra Low profile w/ Broached Chromo Spindle
Accessories
- Color
- Matte Black
Weight & Sizing
- Size
- 15-inch / 17-inch / 19-inch / 21-inch
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.