Acros Ai-47 IS47/30+33 Headset Lower Cup

Use:

For 1 1/4" lower head tubes combined with 1 1/4" / 1 1/8" steerer tubes.

Specifications:

Application:

Cross Country, Road

Lower Bearings:

1 1/4"

Steerer Tube:

1 1/8" or 1 1/4"

Design:

integrated (IS)

Technical Information:

Bearings:

stainless steel angular contact cartridge bearings

Lower Stack Height:

1 mm

Lower Outer Diameter:

47 mm

Lower Inner Diameter:

30 mm or 33 mm

Seals:

R3 (metal-reinforced rubber seal)

Standardized Headset Identification System (S.H.I.S.):

The Standardized Headset Identification System (S.H.I.S.) creates a common language for describing modern bicycle headsets. The system provides comprehensive and scalable headset fitment information in a standardized format; making it easy to communicate headset requirements based on frame and fork interfaces. The system addresses the critical interface dimensions required to fit a fork to a frame, as well as bearing location / cup type. To determine fit, four dimensions are needed: (1) stem-clamp diameter of fork, (2) crown-race seat diameter of fork, (3) head-tube top inside diameter, and (4) head-tube bottom inside diameter. Bearing location and cup-type are identified as (a) external cup (EC), (b) semi-integrated or zero stack (ZS), or (c) integrated (IS).

Nomenclature:

EC:

Bearings contained within cups that are located outside of the frame (external cup).

ZS:

Bearings contained within pressed-in cups where the cup and bearings rest inside the frame (zero stack).

IS:

Bearings that fit directly into a bonded or machined interface that is integrated into the frame (integrated).

Use the AH-T DIY to press in your headset.

Manufacturer Part Number:

45.02.601S

Contents:

• 1 x Acros Ai-47 stainless steel lower bearing
• 1 x 30 mm crown race
• 1 x 33 mm crown race