SIR 9 27.5+ 3-Star XT Complete Mountain Bike - 2017 by Niner
One of the most versatile and smooth-riding hardtails on the market, the Niner SIR 9 27. 5+ 3-Star XT Complete Mountain Bike features the supple characteristics of Reynolds 853 steel construction paired with modernized trail geometry, 27. 5+ wheels for massive traction and rock-smoothing compliance, and 18 mounting points for bikepacking adventures. Whether you're seeking a steel hardtail for spirited rides in the mountains or a dependable pack mule for long-distance adventures, the SIR 9 satisfies your itch for exploration with its simplicity, strength, and smooth-riding characteristics. Making it even more versatile, the SIR 9 easily swaps the included 27. 5+ wheels for the momentum-carrying abilities of its 29-inch brethren. This is especially important, as it lends adaptability for varying trail ecosystems and riding disciplines. By now, you're probably aware the bike industry is constantly pushing the envelope on geometry, with things becoming slacker and longer to accommodate aggressive riding styles. The SIR 9 eagerly follows this modernized trail geometry with its longer top tube and shorter chainstays, which make the bike's handling all the more lively around corners and stable at high speeds. The wheelbase is longer as well, inspiring you to push the envelope when it comes to carrying speed on extended descents. Paired with the provided 120-millimeter Reba RL Solo Air fork, the SIR 9 moves from a rather XC-focused head tube angle of 70 degrees (on previous model) to a trail-worthy 68 degrees. This gives you added confidence to attack steep descents and technical trail sections previously on the edge of the old bike's comfort zone. Although it's slacker than ever, it still pedals and climbs with resounding efficiency, as Niner engineered it with a steeper 74-degree seat tube angle, which places you in an optimal pedaling position. It's no surprise the SIR 9 retains the supple ride quality of its Reynolds 853 steel construction, especially seeing its n...
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