Patent ID: 8181980

Claim:
A bicycle device for fastening a steering tube with a stem tube comprising: two compression rings, each of the compression rings having a lateral surface portion at one end and a protruding portion at another end thereof, an adjusting gap obliquely opened on the compression ring and across the lateral surface portion and the protruding portion, each compression ring being fixed on a stem opening of the stem tube by inserting the lateral surface portion into the stem tube and abutting the protruding portion against the stem opening, the steering tube being inserted into the compression rings; and a fastening set comprising a star nut placed into the steering tube, a cap covering the stem opening and abutted against one of the compression rings, a cap bolt for screwing the cap and the star nut together, wherein a downward screwing force from the cap bolt fastens the steering tube stably within the stem tube and causes the cap to completely cover the compression ring.