NINER mountain bike frame 29 "SIR 9 Steel
The SIR 9 is used as single-speed bike or multi-speed bike and conveys with its fantastic Reynolds frame feel "Steel is Real". The SIR 9 is based on Niner-specific Reynolds 853 tubing and additionally features the new ultra-light eccentric bottom bracket shell. The Breezer style dropouts open up the possibility to accept the derailleur mounting to ensure a clear line in single-speed operation. The bottom bracket system biocentric II of Niner is only 100g the lightest eccentric bottom bracket system on the market. Apart from the low weight, has the biocentric II EBB a much larger adjustment range than other designs, resulting in an easy adjustment of the chain tension and the use of conventional dropouts allows.
The SIR 9 is universally applicable. It can be spontaneously used as a single-speed racer to 27-speed to go the next moment when Tansalp Challenge at the start. Who is not sure which setup is right for the use, can try with the SIR 9 all bike variants.
Frame sizes: S, M, L, XL
Material: Steel (Reynolds 853 DZB)
Headtube: 1 1/8 "or tapered 1 1/8" -1.5 "(ZS44 / 28.6 | EC44 / 40)
Tax rate Einpressmaß: 44 mm
Seat tube (inside diameter): 27.2 mm
Seat tube (outer diameter): 29.6 mm
Umwerferschelle: 28.6 mm low mount (top swing, bottom pull)
Travel: 80 to 100 mm optimized
Bottom bracket width: biocentric II EBB (73mm BSA eccentric)
Switching type: single speed or multispeed (with circuit)
Disc brake mount: Post Mount 6 "Low Tab
suitable wheel size: 29 "
maximum tire width: 2.4 "(depending on the manufacturer also small)
Rear axle system: 142 x 12 Maxle
compatible with 1- and 2-chainring systems (2 times only SRAM or Shimano XT)
Maximum chainring size 1-up: max 36 teeth only with biocentric eccentric
Maximum chainring size 2-fold: SRAM 39 Z, Shimano XT 40 Z
Colors: Arctic White (White), Tamale (red), Yellow Blaze (yellow)
Weight: 2.260g (size M)
Caution: the frame is delivered, not the entire bike.