- 100 day return period
- Online since 1998
- Trusted Shop 4.84 / 5.00
for 1.5" upper head tubes combined with 1.5" forks.
Upper Cup: 1.5"
Steerer Tube: 1.5"
Design: standard Ahead (EC)
Material: aluminium 7000 (CNC - Made in Germany)
Bearings: stainless steel angular contact cartridge bearings with double seals
Insert Depth: 15.2 mm
Bearing Cup (Press Diameter): 49.65 mm
Bearing Cup (Diameter): 59.5 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).
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.
- Design: standard Ahead (EC)
- Application: upper
- Steerer Tube: 38.1 mm
- Head Tube (Frame Inner Diameter): 49.65 mm
- Height: 16.7 mm
Manufacturer Part Numbers:
- 1 x Acros AH-49 upper bearing cup, incl. stainless steel bearings
- 1 x headset dust cap
- 1 x cover cap
- 1 x star nut with M6 x 30 bolt
- 1 x compression ring
- black/EC49/38.1: 85 g