Installation manual

The collar assembly must sit ﬂush with the bottom bracket

shell face (or spacer for 68 mm bottom brackets). So now you

need to determine if you need to add ISCG tab spacers.

If your frame’s ISCG tabs are ﬂush with the bottom bracket shell

face, you do not need to add any spacers. If your frame’s ISCG tabs

are offset inboard of the bottom bracket shell face, you will need to

add the same amount of spacers you used when facing the ISCG

tabs in the Frame Preparation section in order to make the surface

ﬂush (you wrote this down remember?). Locate the ISCG speciﬁc

spacer(s) you need.

NOTE:

68 mm bottom bracket users! You must add an additional 2.5 mm of

spacer thickness to the ISCG spacers you needed above. This will

complete the spacing requirements necessary for HammerSchmidt.

Remove the rubber seal from the front of the collar assembly, if

necessary, to fully access the mounting holes. Place the ISCG

spacer(s) onto the back of the collar assembly and align all of

the mounting holes. Insert the three mounting bolts through the

collar assembly and ISCG spacer(s) to hold everything

together. Carefully slide the complete assembly over the drive

side spindle. Align the mounting bolts to the mating ISCG tabs

and hand start each bolt. Gently push the assembly on so it sits

ﬂat against the ISCG tabs. Use a 4 mm hex to tighten all three

mounting bolts in an alternating fashion. Torque each bolt to

4.5 N·m (40 in-lb).

INSTALLATION