Mixing headset cups

pholt89
pholt89 Posts: 56
edited June 2012 in MTB workshop & tech
I am thinking of changing the headset on my Marin to get a lower stack height.
My current one is an FSA big fat pig and the top cup alone has a stack height of aprox. 20mm.
What I was wondering was is there any problem fitting just a new top cup and leaving the bottom one so that I can keep the current gap between the crown and the downtube to avoid them clashing, but go for a zero stack top cup.
I know it is possible buy a hope top cup on its own from Chain reactions but just want to know if having miss matched ones will cause problems.

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