SHIMANO Deore T521 chainring

SHIMANO - OCTALINK - HOLLOWTECH - MTB Crankset - 3x10-speed - Based on the premium SHIMANO DEORE XT and DEORE LX trekking product line, the FC-T521 offers 3x10 speed gearing and uses an OCTALINK bb interface. It includes an integrated chain guard. Features: - 10-speed Trekking crankset - Following XT/LX trekking product concept - Stable and smooth shifting performance - Simple and sturdy design - Integrated appearance of chain guard - Rigid and lightweight by HOLLOWTECH, OCTALINK Specifications: - Axle length of BB-UN/ ES (mm)_Threaded (chain case): 121-AK - Axle length of BB-UN/ ES (mm)_Threaded (normal): 121-AK - Arm adapter: Yes - Chain case compatible: Yes - Chain line (mm): 50 - Chain ring combination: 48-36-26T, 44-32-24T - Compatible BB type_Octalink: Yes - Compatible chain: HG-X 10-speed - Crank fixing bolt included: Yes - Crank arm length (mm)_170.0: Yes - Crank arm length (mm)_175.0: Yes - Gear arms: 4 - HOLLOWTECH crank arm: Yes - OCTALINK technology: Yes - Optional chain guard_With chain guard: Yes - Optional chain guard_Without chain / bash guard: Yes - P.C.D. (mm): 104/64 - Rear speeds: 10 - Recommended BB_Threaded (normal): BB-ES300 - Stainless chain guard fixing bolt: Yes - Threaded BB shell width_68mm: Yes - Threaded BB shell width_73mm: Yes - Q-factor (mm): 185.8 Technology: HG-X Chain: - Further evolution of shifting performance - A directional mountain bike specific 10-speed HG-X chain means smoother shifts, lighter weight and greater overall performance. - HG-X directional chain: Outer side is optimized for front shifting and inner side is optimized for rear shifting. OCTALINK: - Compared the power transfer of OCTALINK with the conventional square taper spindle, the 8-splined OCTALINK interface that connects bottom bracket and crank set increases the strength and rigidity for entire assembly. HOLLOWTECH Crank Arm: - Hollow forged crank arms - A lightweight crankset not only reduces the bike’s weight, but decreases rotating mass to aid in acceleration. - The challenge is to reduce the weight of the crank without reducing its strength and rigidity. - SHIMANO’s advanced forging technology has solved the problem through the HOLLOWTECH crank. - Just like high quality frame tubing, a hollow crank arm can provide amazing strength and rigidity at very lightweight.