The first rim is more u shaped by it is not wide enough. For a 22mm tyre the rim should be 23 to 24mm wide to minimise drag.
@umop3pisdn thanks both, i'll keep looking
@cycleclinic started
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The first rim is more u shaped by it is not wide enough. For a 22mm tyre the rim should be 23 to 24mm wide to minimise drag.