Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Niner
2021 Niner RKT 9 RDO RS 4-Star
Value Guide market data · 2021 Niner RKT 9 RDO RS 4-Star
12-month trend
11%
Direction and magnitude, not judgment
vs. category average
7%
Drops faster than category avg
Price over time - 2021 Niner RKT 9 RDO RS 4-Star
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All RKT model years
2021 RKT 9 RDO RS 4-Star lineup
Overview
About this bike
2021 Niner RKT 9 RDO RS 4-Star value depends on condition, original build, frame material, service history, and current buyer demand.
Specifications
Frameset
- Fork
- Fox 32 SC Float Factory EVOL FIT4, w/Remote L/O, Kashima Coat, 100mm, 110x15mm, 44mm Offset
- Frame
- Niner RDO Carbon Fiber, 90mm CVA Suspension, Aluminum Rocker Links, Enduro Max Pivot Bearings
- Rear Shock
- Fox Float DPS Factory EVOL, w/Remote L/O, Kashima Coat
Drivetrain
- Groupset
- Shimano XT
- Bottom Bracket
- Raceface PF30
- Cassette
- Shimano XT M8100 12sp, 10-51T
- Chain
- Shimano XT M8100 w/Quicklink
- Crankset
- Raceface NEXT R Carbon 12sp, 32T
- Rear Derailleur
- Shimano XT M8100 SGS 12sp
- Shifters
- Shimano XT M8100 12sp I-Spec EV
Brakes
- Brake Levers
- Shimano XT M8100
- Brakes
- Shimano XT M8100, Metal Pad w/Fin
- Rotors
- 180/160 MT800 Rotors
Cockpit
- Handlebar
- Niner Flat Top RDO, 780mm, Niner Graphic
- Headset
- Niner Integrated SHIS Description IS42/28.6|IS52/40
- Saddle
- Niner Custom With CrN-Ti Rails, Embossed Niner Graphic
- Seatpost
- Niner RDO Seat Post, 370mm, Niner Graphic
- Stem
- Niner RDO Stem, Niner Graphic
- Grips
- Niner Grrrips L/O Soft Compound
Wheels & Tires
- Front Tire
- Front: Schwalbe Racing Ray EVO Super Terrain TLE Addix Speedgrip 2.35", Rear: Schwalbe Racing Ralph EVO Super Terrain TLE Addix Speed 2.35"
- Wheel Set
- Front: DT Swiss XR1700 Spline 25, Center Lock, 110x15mm, Rear: DT Swiss XR1700 Spline 25, Center Lock, 148x12mm
Pedals
- Pedals
- Sold separately
Accessories
- Accessories & Extras
- Stans No Tubes 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
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.