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2021 Large SKU: BMT24232

Niner SIR 9 Mountain Bike - 2021, Large

Regular price

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shipping icon $94.99 RideFast Shipping

About Niner

Niner Bicycles is committed to dirt, so MTB and gravel are their only loves. Niner was early in the 29er game (get it?), and they're still following that groundbreaking spirit today.

Highlights:
- This bike is in excellent condition and ready to ride.

About Niner

Niner Bicycles is committed to dirt, so MTB and gravel are their only loves. Niner was early in the 29er game (get it?), and they're still following that groundbreaking spirit today.
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TPC Guarantee

This bike passed a 141-point inspection and received a full pro-tune by our Master Mechanics in our Certified Pre-Owned process. CPO bikes are pristine and ready to ride!

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30-Day Hassle-Free Returns

Shop with confidence. Every bike is covered by our 30-day satisfaction guarantee. If this bike isn’t perfect for you, get in touch and we’ll help you find the right bike.

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RideFast Shipping

Assemble your bike in 15 minutes or less! Our bikes ship in our RideFast box for speed and safety. All tools you need to assemble are included.

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Specifications

Year 2021
Brand Niner
Model SIR 9
Size Large
Frame Material Steel
Drivetrain SRAM, 1x11 spd
Weight 27 lbs 6 oz
Fork FOX Performance Series 34 FLOAT Step Cast
Fork Travel 120mm
Rear Shock Travel N/A
Brakes SRAM G2 RSC, Disc - Hydraulic
Shifters SRAM X01, Mechanical
Rear Derailleur SRAM X01
Bottom Bracket Shell Threaded
Crankset Praxis Works Girder Carbon, 32t, 170mm
Cassette SRAM XG-1195, 10-42t
Chain SRAM
Handlebar Ritchey WCS Carbon, 740mm
Headset Cane Creek Forty
Stem Ritchey WCS Trail Alloy, 31.8mm x 60mm, 0°
Seatpost Race Face Turbine R , 30.9mm
Seatpost Travel 125mm
Saddle Fi'zi:k Antares VS
Front Axle Spacing 15x110mm (Boost)
Rear Axle Spacing 12x148mm Boost
Wheelset Stan's NoTubes FLOW MK4 Aluminum Tubeless Compatible, Chris King
Front Tire Maxxis Ikon 3C MaxxSpeed EXO TR, 29" x 2.35"
Rear Tire Maxxis Rekon Race EXO TR, 29" x 2.25"
Tire Type Tubeless
Tubeless Compatibility Bike ships tubeless

Geometry

Recommended Rider Height 5'10" - 6'1"
a. Effective Top Tube 627 mm
b. Seat Tube 485 mm
c. Seat Tube Angle 74°
d. Head Tube Angle 68°
e. Head Tube 125 mm
f. Stack 634 mm
g. Reach 445 mm
h. Standover Height 791 mm
i. Saddle Height Range N/A
VIEW SIZING GUIDE
QUALITY YOU CAN TRUST

“I love this company! My beautiful bike arrived promptly, was packed brilliantly, and tuned perfectly. It was exactly as described.”

— Kari K.

OVER 1,500 FIVE-STAR REVIEWS

“In the past month, I purchased a road bike and MTB from TPC. Very happy with the price and condition of both bikes! I was riding the bikes 10 minutes after I received them.”

— David H.

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