SIR 9 29 2-Star SLX Complete Mountain Bike - 2017 by Niner
The Niner SIR 9 29 2-Star SLX Complete Mountain Bike is one of the most versatile hardtails on the market with its supple Reynolds 853 steel construction paired with modernized trail geometry, 29-inch wheels for steam-rolling capabilities, and 18 mounting points for bikepacking adventures. Whether you're seeking a steel hardtail for spirited rides through the local mountains or a dependable pack mule for long-distance adventures, the SIR 9 satisfies your itch for exploration with its simplicity, strength, and unmatched versatility. The customization doesn't stop there, with the SIR 9 swapping the momentum-carrying, obstacle-rolling 29er wheels for the voluminous traction and bump-smoothing ride of 27. 5+ wheels. This is a great feature, as you can swap wheel sizes at a moment's notice to accommodate different trails and riding disciplines. Since the bike industry is constantly evolving, it makes perfect sense that Niner designed the latest SIR 9 with their [R]evolution trail geometry, which makes the bike longer in the top tube and shorter in the chainstays. This redesign gives the SIR 9 a lively personality that's quick to turn through tight switchbacks and sweeping berms, as well as making it roomier in the cockpit, so you're well-balanced and comfortable across long distances. The longer wheelbase inspires confidence when you open it up at higher speeds without it ever feeling twitchy or unnerving when pushed to the limit. Paired with the provided Reba RL Solo Air fork with 120-millimeters of travel, the SIR 9 moves from a rather XC-focused head tube angle of 70 degrees (for the previous model) to a more trail-worthy 68 degrees. This gives you added confidence to attack fast descents and technical sections previously on the edge of the old bike's comfort zone. Although it's slacker than ever, the SIR 9 still pedals and climbs with resounding efficiency, as Niner designed it with a seat tube angle of 74-degrees, which places you in an optimal position for lay...
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