a 15mm spanner?
If they are the Odyssey bmx pedals (which I think they are) you may not even need a spanner, I think you can put them on/take them off with an allen key?
@CrazyJames started
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If they are the Odyssey bmx pedals (which I think they are) you may not even need a spanner, I think you can put them on/take them off with an allen key?