Discussion
I'm in the process of servicing my winter bike and I decided to replace my headset.
Checked with LBS that the bearings were the same; the only difference being that that dust cover is much shallower and as such I now have a 10mm & 5mm spacer.
There is now however a small gap at the top that means that the top cap can't fully pre-load the steerer, as such the headset is now loose.
Do I need to have the steerer trimmed ever so slightly? There isn't enough space to add an extra spacer at the top.
Nothing is ever easy!

Checked with LBS that the bearings were the same; the only difference being that that dust cover is much shallower and as such I now have a 10mm & 5mm spacer.
There is now however a small gap at the top that means that the top cap can't fully pre-load the steerer, as such the headset is now loose.
Do I need to have the steerer trimmed ever so slightly? There isn't enough space to add an extra spacer at the top.
Nothing is ever easy!
You need a bigger spacer at the top, or cut the steerer.
My 'cross bike has a three mil spacer on top of another spacer, it is similar to yours, it is more or less floating in fresh air, but I can't be arsed cutting down the steerer. Once the stem is clamped anything about the stem isn't doing a great deal anyway.
My 'cross bike has a three mil spacer on top of another spacer, it is similar to yours, it is more or less floating in fresh air, but I can't be arsed cutting down the steerer. Once the stem is clamped anything about the stem isn't doing a great deal anyway.
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