Shimano FC-T521 Octalink Crankset w/ Chain Guard

Shimano FC-T521 with chain guard - The Octalink crankset for city & touring

The Shimano FC-T521 is an Octalink crankset for 10-speed touring drivetrains. Although it has no groupset, it meets the quality criteria of comparable LX components, for example with regard to the smoothness of shifting or the shapely integration of the chain guard ring as well as chain case compatibility. Hollow forged crank arms (Hollowtech technology) provide stability with the lowest possible weight. The crank comes with three chainrings (104/64 mm bolt circle diameter), which are attached to a 4-arm spider. You have the choice between a black and a silver version.

Specifications:

Application:

City & Touring

Compatibility:

Shimano 3x10-speed

Chainring Mount:

104/64 mm bolt circle diameter, 4-arm

Technical Information:

Crank Arm Material:

aluminium

Chainring Material:

aluminium / steel-fibreglass composite (32 T), steel (36 T) / steel

Gradation:

24-32-44, 26-36-48

Crank Arm Length:

170.0 mm, 175.0 mm

Chainline:

50 mm

Q-Factor:

185.8 mm

Compatible BSA Shell Width:

68 mm / 73 mm

Recommended Bottom Bracket:

BB-ES300 Octalink or BB-ES300-AK Octalink (with chain case), 121 mm axle (not included)

Recommended Chain:

HG-X 10-speed (e.g. CN-HG95)

Compatibility:

Touring 3x10-speed:

Shifter:

SL-T8000, SL-T780, SL-M780, SL-T670, SL-M670, SL-T610, SL-M610, SL-M591, SL-T6000

Front Derailleur:

FD-T8000, FD-T780, FD-T781, FD-T670, FD-T671, FD-T610, FD-T611, FD-T6000

Bottom Bracket:

BB-ES300 (Octalink, 121 mm axle)

Chain:

CN-M981, CN-M980, CN-HG95, CN-HG94, CN-HG75, CN-HG74, CN-HG54

Chain Case:

compatible

Features:

• follows XT/LX Trekking product concept
• gentle shifting performance in combination with HG-X chain
• integrated design of the chain guard
• stable and light due to Hollowtech construction (hollow crank arms)
• crank arms and large chainring anodised, medium/small chainring painted
• stainless steel chainring bolts
• with chain guard

Technology:

Octalink
In Shimano's Octalink system, the bottom bracket and crank are connected by an 8-tooth contact surface. This provides greater rigidity and greater load capacity, especially compared to conventional square systems.

Manufacturer Numbers:

black 170.0 mm 24-32-44:

E-FCT521C424CL

sliver 170.0 mm 24-32-44:

E-FCT521C424CS

black 175.0 mm 24-32-44:

E-FCT521E424CL

sliver 175.0 mm 24-32-44:

E-FCT521E424CS

black 170.0 mm 26-36-48:

E-FCT521C866CL

sliver 170.0 mm 26-36-48:

E-FCT521C866CS

black 175.0 mm 26-36-48:

E-FCT521E866CL

sliver 175.0 mm 26-36-48:

E-FCT521E866CS

Contents:

• 1 x Shimano FC-T521 crankset (24-32-44 or 26-36-48 tooth)
• 1 x Shimano chain guard
• 2 x crank bolts
• 2 x washers