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@Cohen
unfortunatley i have cottered cranks so im stuck with 46 teeth up front
therefore 22t isn't ideal as it only 11 skid patches
23t is 1 skid patch
24t is 12 skid patches (not bad)
but by far the best is 25t with 25 skid patches and 48.5GI
so thats why i'm hunting down a 25t