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Today’s Deals2018 Niner
SIR 9 29 4-Star
A 29″ steel frame hardtail trail bike with ultra high-end components.
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Manufacturer Price
$4,950| Frame | Steel |
|---|---|
| Suspension | Hardtail, 120mm |
| Fork | Fox Factory Float 34 |
| Wheels | 29″ Aluminum |
| Drivetrain | 1 × 12 |
| Groupset | X01, X1 |
| Brakes | SRAM Guide RSC Hydraulic Disc |
| Seatpost | Dropper |
5'2" – 5'8"
5'6" – 5'11"
5'10" – 6'3"
6'1" – 6'7"
🐐 Estimated
None yet.
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Summary
The Niner SIR 9 is a versatile cross-country bike praised for its durable Reynolds 853 steel frame, modern geometry, and ample bikepacking features. It offers a comfortable and stable ride, with handling that inspires confidence both uphill and downhill. The bike's compatibility with multiple wheel sizes and drivetrain options adds to its appeal for a wide range of riders.
Durable Reynolds 853 steel frame
Modern geometry for confident handling
Ample bikepacking features and mounting options
Compatible with multiple wheel sizes and drivetrains
Comfortable and stable ride quality
Initial feel of 27.5+ wheels as heavy and slow to accelerate
Requires adjustment period for those used to super-light 29er race bikes
73mm PF30 BB shell requires adaptors for BSA type BBs
A lively, modern geometry suited to challenging trails, both up and down.BIKEPACKING.com
It’s a solid, well-built machine that really does make you feel like you can head out for days.
Mountain FlyerNiner’s new shred-ready hardtail can accommodate 29er or 27.5+ wheels.
MTBRFeedback?
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Oct 2018
I have to admit — I am somewhat of a crusty old dude and sometimes resist change until it has been thoroughly tested by others. This being the case, I was a bit doubtful when I first climbed on the Niner SIR 9, a steel hardtail that can run 27.5-plus or 29-inch wheels. The 27.5x 2.80 tires seemed like overkill compared to my super-light 29er race bike, and the thought of riding a bike that wasn’t fully suspended had me questioning my sanity.
Oct 2017 · Cass Gilbert
Like steel hardtails? We test the Niner SIR 9, boasting a modern, slack geometry, room for 27.5+ tires, and a host of bikepacking-friendly details.
Although its gear range is excellent, SRAM XO1 Eagle feels built for racing rather than bikepacking. It’s fiddly to set up and sensitive to cable stretch.
Press fit bottom bracket requires specialist tools that may be hard to find in the backcountry.
While an eccentric insert is available, none of the standard builds include it.
Jun 2017 · Mtbr
News out of the Niner camp today. The Colorado-based bike maker has re-released its original steel classic, the SIR 9, in a redesigned, ready for anything form. - Mtbr.com
| Frame | Chromoly |
|---|---|
| Fork | FOX 34 Factory Float FIT4, Kashima coating, EVOL air canister, 3-position compression adjustment Travel: 120mm Spring Type: Air |
| Shock | N/A |
| Bottom Bracket | Pressfit |
| Headset | Niner headset, zero-stack SHIS, ZS44/28.6, ZS56/40 |
| Stem | Race Face Turbine Basic 35, 50mm length |
| Handlebar | Race Face SixC 35, 820mm width |
| Saddle | Niner Custom TR, carbon-titanium rails, custom Niner graphic |
| Seatpost | KS Lev Integra Type: Dropper |
| Pedals | N/A |
| Grips | Niner Grrrips, nylon flanges |
| Rear Derailleur | SRAM Eagle X01, 12-speed |
|---|---|
| Front Derailleur | N/A |
| Crank | SRAM X1 Carbon |
| Shifters | SRAM Eagle X01, 12-speed |
| Cassette | SRAM XG-1295, 10-50 tooth |
| Chain | SRAM X01 Eagle, 12-speed |
| Chain Guide | N/A |
| Brakes | SRAM Guide RSC, 180mm front / 160mm rear rotors Type: SRAM Guide RSC Hydraulic Disc |
| Brake Levers | SRAM Guide RSC |
| Rims | Stan's NoTubes Neo/ZTR Arch MK3 |
|---|---|
| Front Hub | Stan's NoTubes Neo/ZTR Arch MK3, 15mm x 110mm, 12mm x 148mm |
| Rear Hub | Stan's NoTubes Neo/ZTR Arch MK3, 15mm x 110mm, 12mm x 148mm |
| Tires | Front: Maxxis Ardent 2.4", dual compound, tubeless ready, Rear: Maxxis Ardent 2.25", dual compound, tubeless ready |
First added April 14
Last updated April 14
Not listed for 2,995 days