thump55

This is blowing my mind. I removed my cassette for general maintenance and now when I put it back together, I cannot get the lock ring to engage. It appears the stack is too "high".

It is a Shimano 10 spd (105). I have the 1mm spacer on before the first cog. Everything looks right to me, all spacing is equal between cogs.

It is not a thread problem, the lockring screws in just fine if I remove the outer cog. The threads are just too far away to even try to start.

I put the stack on and off a dozen times last night and for the life of me, I can't figure it out. What am I missing?

joejack951

Make sure some part of the stack is not getting caught on a ridge on the freehub body and not seating fully. Aluminum freehub bodies can gouge easily especially with the partial spline design used by the 10 speed loose cogs. This could be easily verified by seeing if the last 3 cogs on the carrier are loose when all of the other cogs are installed. Have you tried individually installing cogs to make sure they all slide on smoothly?

thump55

The hub is in good shape. I separated, cleaned and re-installed all the cogs/spacers individually.

How long is the threaded area supposed to be on the lockring? Mine is .150" (about 5/32" or 3.8mm)

joejack951

That sounds about right. The threaded area is quite short on every lockring I've come across.

Are you sure that you are properly aligning your top cog? If it's an 11T cog, make sure there is no grit inside of the splines that could become trapped between the freehub and cog when you install it. The 11T cogs are not open all the way through like 12T cogs are (though I don't know which cog you are using).

Have you tried installing just the top cog and seeing if the lockring will go on?

thump55

The smallest cog is a 12T. It seems to be down all the way. When the wheel is horizontal and I look at the cogs, they are all spaced evenly.

The three biggest cogs are one piece, and the two smallest (12/13) have the spacers built right in to the cogs.

I realize this seems impossible.

EDIT: If I remove the 1mm spacer, the lockring screws on fine. If I remove the 13T cog, the lockring screws on and tightens all the cogs down fine.

joejack951

Did you ever sort this out?