The Shimano 105 10-speed chainring for FC-5703 triple cranks has a bolt circle of 74 mm (30 t) or 130 mm (39 t, 50 t). All versions are made of aluminium and are available in silver or black. Thanks to their SG-X profile with specially shaped teeth, ramps and leading teeth, the chainrings ensure smooth shifting and fit perfectly into the HyperDrive compound of the front drivetrain components.

Specifications

• Application: Road
• Mount: 130/74 mm bolt circle diameter, 5-arm
• Teeth: 30 t, 39 t, 50 t
• Gearing: 3x10-speed
• Type: D
• Bolt Circle Diameter: 130 mm
• Manufacturer Part Number: Y-1M498010

• 39T

• Aluminum

• 105 FC-5703

• Silver

SG-X
SG-X chainrings constitute a significant technological advance, as they allow extremely smooth shifting even under extreme load. Special tooth profiles, positioning pins and shifting aids allow the front shifting to go as smoothly and easily as you are accustomed from the rear components. SG-X chainrings ensure smoother, quieter and faster shifting.

HyperDrive

Shimano´s front shifting system is based on the HyperDrive concept. The front derailleur, the HG chain and SG-X chainrings work in a coordinated combination to make shifting more reliable, faster and more accurate. Without HyperDrive, problems are quick to appear when shifting on the big chainring, especially when under load. Shimano's HyperDrive system solves those problems. The SG-X chainrings, Wide Link front derailleur and HG chain work together to improve chain control to provide precise and reliable front derailleur shifting that is especially beneficial in severe off-road riding conditions. The chainrings have an exceptionally high torsional stiffness. The tooth profile is specifically shaped to allow the chain to glide in both directions and be picked up smoothly while shifting.