IS41 headset standard (integrated vs IS42 headset standard (integrated: specs compared
Updated 05 September 2026.
2
specs differ
IS41 headset standard (integrated and IS42 headset standard (integrated differ on 2 specs: shis designation, cup / bearing outside diameter.
| Spec | IS41 headset standard (integrated | IS42 headset standard (integrated |
|---|---|---|
| SHIS designation | IS41 (integrated (IS)) | IS42 (integrated (IS)) |
| Cup / bearing outside diameter | 41.0 to 41.1 mm bearing outside diameter | 41.8 to 42.0 mm bearing outside diameter |
| Steerer diameter | 28.6 mm (1 1/8 in) | 28.6 mm (1 1/8 in) |
| Crown race | 30.0 mm crown race, or machined into the fork | 30.0 mm crown race, or machined into the fork |
Questions and answers
How do IS41 headset standard (integrated and IS42 headset standard (integrated compare?
IS41 headset standard (integrated and IS42 headset standard (integrated differ on 2 specs: shis designation, cup / bearing outside diameter.