As this is a common problem on XTR M972 carbon mechs I had to update this.I got a brand new XT M772 inner cage for £14 delivered.Make sure of your cage length before you order-GS 79mm between jockey centres and SGS 100mm between centres.These are a perfect fit and are far more durable,so even if your cage isnt broken I`d advise switching to on XT cage. https://www.ebay.co.uk/itm/Shimano-Deor ... Swe~Bbr34g
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