The Shimano Ultegra FC-08 crankset brings groupset-grade engineering to demanding road cyclists at a compelling price point below Dura-Ace. Featuring Hollowtech II integrated spindle construction and Hollowglide hollow outer chainring technology, it delivers excellent stiffness, efficient power transfer, and precise front shifting for 11-speed double drivetrains. The 52/36T combination at 172.5mm suits a wide range of road riding from flat sprints to sustained climbs.

Highlights

  • Hollowtech II integrated spindle: axle forged into the right crank arm for maximum torsional stiffness and reduced system weight.
  • Hollowglide outer chainring: hollow-forged construction sheds weight while maintaining the strength needed for precise, low-effort front shifts.
  • 110mm asymmetric BCD: four-bolt double chainring pattern purpose-built for 11-speed road geometry.
  • 52/36T chainring combination: versatile road gearing suited to fast flat riding and extended climbing.
  • 172.5mm crank arm length: well suited to riders in the 175–185cm height range.
  • 681g total weight: competitive weight for an 11-speed Ultegra-tier double crankset.
  • 43.5mm chainline: optimised for standard 130mm O.L.D. road drivetrains and 135/142mm road disc hubs.

Hollowtech II & Hollowglide Construction

Shimano's Hollowtech II design integrates the bottom bracket spindle directly into the right crank arm, eliminating the traditional threaded interface between crank and axle. This delivers a significant improvement in torsional rigidity and reduces overall system weight. The Hollowglide chainring uses hollow forging to reduce rotating mass, improving acceleration response and reducing fatigue on long road rides without sacrificing shift precision or ring durability.

Chainring Geometry

The asymmetric 110mm BCD four-bolt spider is purpose-designed for 11-speed double road drivetrains. The 52/36T combination provides a wide gear range: the 52T outer ring covers fast flat riding and descents, while the 36T inner ring handles extended climbs. The wider gear pitch between chainrings improves chain clearance on modern road frame geometries with tighter tolerances.

Compatibility & Fit

Designed for 11-speed rear drivetrains. Compatible with Shimano HG-EV and HG-X11 11-speed chains. Requires a separate outboard bottom bracket — compatible with Shimano SM-BBR60 (BSA threaded 68/70mm) or press-fit equivalents for 86mm shells. Spindle interface: Hollowtech II 24mm. Chainline: 43.5mm. Q-factor: 146mm. Fits frames with 68mm, 70mm, and 86mm bottom bracket shell widths. Compatible with 130mm O.L.D. rear hubs and 135/142mm road disc hubs. Bottom bracket not included.

Shimano offers a limited warranty covering defects in materials and workmanship. For warranty support, return the item to Tune Cycles.
  • Hollowtech II integrated spindle — axle forged into right crank arm for stiffness and light weight
  • Hollowglide hollow outer chainring — reduced rotating mass without sacrificing strength or shift quality
  • 52/36T double chainring combination — versatile road gearing for flat, mixed, and hilly terrain
  • 110mm asymmetric BCD — four-bolt spider optimised for 11-speed double road drivetrains
  • 172.5mm crank arm length — suits riders approximately 175–185cm
  • 681g total weight — efficient weight for an Ultegra-class double crankset
  • 43.5mm chainline — compatible with standard road and road disc drivetrains
  • Compatible with Shimano HG-EV and HG-X11 11-speed chains
BrandShimano
SeriesUltegra
Part NumberFC-08
Speeds11-speed
Chainring Teeth52/36T
Crank Arm Length172.5mm
BCD110mm asymmetric
Chainline43.5mm
Q-Factor146mm
Weight681g
Spindle InterfaceHollowtech II (24mm)
BB Shell Width68mm / 70mm / 86mm
Chain CompatibilityShimano HG-EV, HG-X11 (11-speed)
ColourBlack
Bottom BracketNot included
SKU SHM-IFC08DX26A
Barcode # 4550170746872
Brand Shimano

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