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Today’s Deals2018 Niner
SIR 9 29 2-Star
A 29″ steel frame hardtail trail bike with high-end components.
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Manufacturer Price
$3,200| Frame | Steel |
|---|---|
| Suspension | Hardtail, 120mm |
| Fork | Fox Rhythm Float 34 |
| Wheels | 29″ Aluminum |
| Drivetrain | 1 × 12 |
| Groupset | GX, Truvativ Stylo |
| Brakes | SRAM Guide R 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?
View all reviews
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 Float Rhythm, GRIP damper, EVOL air canister 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 Aeffect R, 50mm length |
| Handlebar | Race Face Aeffect R, 780mm width, 20mm rise |
| Saddle | Niner Custom TR, chromoly rails, printed Niner graphic |
| Seatpost | KS Lev Integra SI Type: Dropper |
| Pedals | N/A |
| Grips | Niner Grrrips, nylon flanges |
| Rear Derailleur | SRAM Eagle GX, 12-speed |
|---|---|
| Front Derailleur | N/A |
| Crank | SRAM Stylo 7K Eagle |
| Shifters | SRAM Eagle GX, 12-speed |
| Cassette | SRAM XG-1275, 10-50 tooth |
| Chain | SRAM GX Eagle, 12-speed |
| Chain Guide | N/A |
| Brakes | SRAM Guide R, 180mm front / 160mm rear rotors Type: SRAM Guide R Hydraulic Disc |
| Brake Levers | SRAM Guide R |
| Rims | Niner Alloy 29" |
|---|---|
| Front Hub | Niner Alloy 29", 15mm x 110mm, 12mm x 148mm |
| Rear Hub | Niner Alloy 29", 15mm x 110mm, 12mm x 148mm |
| Tires | Front: Maxxis Ardent F60 2.4", soft compound, Rear: Maxxis Ardent F60 2.25", soft compound |
First added April 14
Last updated April 14
Not listed for 2,988 days