You may be able to shim it too - I've had a quick look and they're not really abundant ith a 27.0 outer diameter, but they must exist (USE have loads of sizes I think, they used to only do their seatposts in one size).
@christianSpaceman started
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You may be able to shim it too - I've had a quick look and they're not really abundant ith a 27.0 outer diameter, but they must exist (USE have loads of sizes I think, they used to only do their seatposts in one size).