cap 44 onto the axis shaft 28 once the upper and lower bearings 40 36 are properly pre loaded the headset cap 44 should be fixed to the axis shaft 28 such that the headset cap 44 does not become loose while the rider is riding the bicycle 10 as discussed above the headset locking screw 68 fixes the headset cap 44 to the axis shaft 28 as an alternate means of fixing the headset cap 44 to the axis shaft 28 the pin 110 may have external threads the external threads of the pin 110 are threadably engageable to the upper and lower internal threads 47 46 of the headset cap 44 the pin 110 is initially disposed adjacent the upper internal threads 47 the reason is that the lower internal threads 46 of the headset cap 44 are threaded onto the external threads 48 of the axis shaft 28 the pin 110 should not contact the top distal end 116 of the axis shaft 28 when the upper and lower bearings 40 36 are being pre loaded after the upper and lower bearings 40 36 are pre loaded the pin 110 is rotated clockwise to traverse the pin 110 into engagement with the top distal end.