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}Surly ExtraTerrestrial Tire - 27
It serves as a simple device to offset the position of the rear derailleur making it possible to run a wide-range mountain bike style cassette
Brake Type Post Mount 180 Color Gloss Black Crown Race 40 Defined Color Black Designed for ebike Yes External Adjustments Low Speed Compression Damping External Adjustments Rebound Damping Front Axle 15mm Thru x 110mm Lockout Switch Crown Maximum Tire Width 81 Negative Spring Air Offset 44 Positive Spring Air S
6 | ZS56/40 Upper Cup 44mm Material 7075-T6 Aluminum SHIS Lower ZS56/40 Primary Color Black Bearing Grade ACB Sealed Lower Cup 56mm Misc Set 4 120-129mm
}Surly Stainless Steel Chainring 22t x 58mm MWOD Inner
SRAM X-Sync Eagle 12sp Boost DM Ring Forged 34t Blk > Overall Length (mm)-170.5 }Surly ExtraTerrestrial Tire - 27SRAM X Sync 2 Eagle Cold Forged Direct Mount Chainring 34T Boost 3mm Offset. Intense study of chain and chainring wear patterns led to the radical tooth profile that lasts longer runs quieter and further improves chain retention. Cold forged Aluminum ring Eagle Technology tooth profile Approximate +10g in weight compared to the fully CNC version TECH SPECS Direct Mount Type Direct Mount SRAM Tooth Count 34 Drivetrain Speeds 12 Drivetrain Speeds 11
