Inspection
Frame condition
Inspect the frame, fork, welds, and high-stress areas for cracks, dents, or prior repairs.
Niner
2019 Niner SIR 9 3-Star GX Eagle 27.5+
Previous used estimate
$1,203 - $1,237
Actual value depends on condition, size, and local demand.
Value Guide market data · 2019 Niner SIR 9 3-Star GX Eagle 27.5+
12-month projected trend
15%
Direction and magnitude, not judgment
vs. category average
4%
Drops faster than category avg
Price over time - 2019 Niner SIR 9 3-Star GX Eagle 27.5+
Values based on actual sales data. Enter your bike's specifics to get a precise valuation.
All SIR model years
Overview
About this bike
Take charge of your ride with this Reynolds 853 Steel frame designed around Niner's [R]evolution trail geometry, which begs the rider to push their limits. Ride it hard. Ride it fast. After all, it's made from a truly time-tested material that's been air hardened and heat treated. The efficient yet compliant ride quality of the SIR 9 harkens back to a simpler time. A time without linkages and complicated shock settings. A time where all the energy you put into the pedals moves you forward. The SIR 9 features a redesigned bottom bracket and chainstay junction—keeping ride quality in mind as well as tire clearance, Niner went to great lengths to design this crucial element. The PF30 Bottom Bracket allows you to run a standard press fit bottom bracket or, if simplicity is your thing, throw in an eccentric bottom bracket and run it singlespeed. Additionally, it has the ability to run 1x, 2x, or 3x systems for a drivetrain to suit every rider and trail. A hidden plate inside the chainstay yoke stiffens and strengthens in order to improve power transfer. For bikepacking aficionados, this frame is extremely versatile. It offers a whopping 18 mounting points, allowing you to run racks and fenders, a top tube Bento box, 3 water bottles, and more, so you can easily pack it in and pack it out. The frame accepts up to a 120mm fork for truly getting rad, and is compatible with 29-inch or 27.5-inch plus tires. - SRAM GX Eagle drivetrain - Stan's NoTubes Arch wheels - SRAM Guide R brakes
Specifications
- Subtype
- Cross Country
- Category
- Mountain
- Component Fork
- FOX 34 SC FLOAT FACTORY FIT4 EVOL, 3 POSITION W/ ADJ, KASHIMA COAT, 51MM OFFSET
- Component Size
- Small, Medium, Large, X-Large
- Component Stem
- RACE FACE AEFFECT R 40MM, 35MM CLAMP
- Product Family
- SIR
- Component Axles
- FRONT: 15 x 110MM REAR: 12 x 148MM
- Component Chain
- SRAM GX EAGLE 12SP
- Component Color
- Slate Blue/Orange
- Component Frame
- REYNOLDS 853 AIR HARDENED, HEAT TREATED STEEL, INTEGRATED FRAME BAG AND TOP TUBE BENTO BOX MOUNTS, 3 BOTTLE MOUNTS, REAR RACK MOUNTS, FITS TIRES UP TO 29 X 2.4" OR 27.5 X 3.0"
- Component Brakes
- SRAM GUIDE R | 180/160MM SRAM G2CS ROTORS
- Component Saddle
- NINER CUSTOM TR WITH CHRO-MO RAILS, PRINTED NINER GRAPHIC
- Component Headset
- NINER INTERNAL SHIS ZS44/28.6|ZS56/40
- Component Cassette
- SRAM EAGLE XG 1275, 10-50T
- Component Crankset
- SRAM DESCENDANT 7K EAGLE DUB
- Component Shifters
- SRAM GX EAGLE 12SP
- Component Handlebar
- RACE FACE AEFFECT R 780MM WIDE, 20MM RISE, 35MM CLAMP
- Component Seat Post
- KS LEV SI
- Component Chainrings
- 32T
- Component Front Tire
- MAXXIS REKON+ DC/EXO/TR 27.5 x 2.8"
- Component Tape Grips
- NINER GRRRIPS L/O NYLON FLANGED
- Component Brake Levers
- SRAM GUIDE R
- Component Bottom Bracket
- SRAM DUB PF30
- Component Rear Derailleur
- SRAM GX EAGLE 12SP
- Crankset
- SRAM DESCENDANT 7K EAGLE DUB
- Bottom Bracket
- SRAM DUB PF30
- Chain
- SRAM GX EAGLE 12SP
- Saddle
- NINER CUSTOM TR WITH CHRO-MO RAILS, PRINTED NINER GRAPHIC
- Handlebar
- RACE FACE AEFFECT R 780MM WIDE, 20MM RISE, 35MM CLAMP
- Headset
- NINER INTERNAL SHIS ZS44/28.6|ZS56/40
- Rear Derailleur
- SRAM GX EAGLE 12SP
- Stem
- RACE FACE AEFFECT R 40MM, 35MM CLAMP
- Axles
- FRONT: 15 x 110MM REAR: 12 x 148MM
- Brake Levers
- SRAM GUIDE R
- Brakes
- SRAM GUIDE R | 180/160MM SRAM G2CS ROTORS
- Cassette
- SRAM EAGLE XG 1275, 10-50T
- Chainrings
- 32T
- Fork
- FOX 34 SC FLOAT FACTORY FIT4 EVOL, 3 POSITION W/ ADJ, KASHIMA COAT, 51MM OFFSET
- Frame
- REYNOLDS 853 AIR HARDENED, HEAT TREATED STEEL, INTEGRATED FRAME BAG AND TOP TUBE BENTO BOX MOUNTS, 3 BOTTLE MOUNTS, REAR RACK MOUNTS, FITS TIRES UP TO 29 X 2.4" OR 27.5 X 3.0"
- Seat Post
- KS LEV SI
- Shifters
- SRAM GX EAGLE 12SP
- Tape/Grips
- NINER GRRRIPS L/O NYLON FLANGED
- Color
- Slate Blue/Orange
- Size
- X-Large
- Front Tire
- MAXXIS REKON+ DC/EXO/TR 27.5 x 2.8"
What to check when buying used
Inspection
Drivetrain wear
Check chain stretch, cassette teeth, chainrings, and shifting under load before negotiating price.
Inspection
Service history
Ask for service records covering bearings, brakes, drivetrain, and any frame or fork warranty work.
Inspection
Suspension service
Confirm fork and rear shock service intervals and check pivot bearings for play.