MTB bars in road stem?
Okay, so I've got a 25.4 MTB bar, but have found a couple of deals on road stems, intended for 25.8/26 bars. They all have removeable face plates. Does it need a shim to work or get it tight enough? Or can I get away with a discrepancy of 0.4-0.6mm?
Sorry if this is a dumb, over-asked question, but that's not a place I want equipment to fail.
In case it matters, it's for my MTB. Thanks in advance.
Doug