Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Niner
2021 Niner MCR RDO 5-Star GRX 800 2x
Value Guide market data · 2021 Niner MCR RDO 5-Star GRX 800 2x
12-month trend
17%
Direction and magnitude, not judgment
vs. category average
10%
Drops faster than category avg
Price over time - 2021 Niner MCR RDO 5-Star GRX 800 2x
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All MCR model years
2021 MCR RDO 5-Star GRX 800 2x lineup
Overview
About this bike
2021 Niner MCR RDO 5-Star GRX 800 2x value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Fox 32 SC Float AX Performance Elite EVOL FIT4, 40mm, 100x15mm, 44mm Offset
- Frame
- Niner RDO Carbon Fiber: 50mm CVA Suspension; Forged Alloy Links; Enduro Max Pivot Bearings; Internal Cable Routing; Integrated Fender; Bottle, Bag, And Rack Mounts; Flat Mount; 12x142 Thru Axle
- Rear Shock
- X-Fusion Microlite RL w/Remote Lockout
Drivetrain
- Groupset
- Shimano GRX
- Bottom Bracket
- Easton PF30
- Cassette
- Shimano Ultegra HG800 11sp 11-34T
- Chain
- Shimano HG 601 11sp
- Crankset
- Easton EC90 Carbon 47x32T
- Front Derailleur
- Shimano Ultegra R8000
- Rear Derailleur
- Shimano GRX 800 GS 11sp Shadow Plus
- Shifters
- Shimano GRX 800 11sp
Brakes
- Brake Levers
- Shimano GRX 800
- Brakes
- Shimano GRX 800
- Rotors
- Shimano RT800 160/160mm Cl Rotors
Cockpit
- Handlebar
- Easton EA50 AX
- Headset
- Niner Integrated SHIS Description IS42/28.6|IS52/40
- Saddle
- Niner Custom With Crn-Ti Rails, Embossed Niner Graphic
- Seatpost
- Niner RDO Carbon, 400mm
- Stem
- Niner RDO Carbon
- Grips
- Niner Bar Tape
Wheels & Tires
- Front Tire
- Schwalbe G-One Allround Evo Super Terrain, TLE, Addix Speedgrip, 700c x 38
- Wheel Set
- Front: Stan's NoTubes Grail CB7, Neo Ultimate Hub CL 100x15mm, Rear: Stan's NoTubes Grail CB7, Neo Ultimate Hub CL 142x12mm
Pedals
- Pedals
- Sold separately
Accessories
- Accessories & Extras
- Stan's NoTubes Sealant (2 x 2oz Bottles)
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
Carbon inspection
Tap test the frame, fork, seatpost, and bars for cracks; verify no impact damage near dropouts.
Inspection
Brake hoses & cables
Check hydraulic line bleed, cable housing wear, and confirm rotors are within spec.