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Even if they're not will the inserts be ok anyway?
They'll just do what the old ones have done, pick up flakes of anodising and score the rims. There are plenty of other pads which will fit in Shimano pattern MTB shoes, which is what those are, but I don't think any of them are much better than the OE Shimano ones. I'd be tempted by these, two pairs of pads and spare shoes to clutter up your parts bin 🙂
Getting a bit confused trying to find the right brake pad inserts for my partner's bike. I think they're Shimano BR-R550 brakes, and SJS has these ones in stock: https://www.sjscycles.co.uk/brake-blocks/shimano-brr550-m70ct4-cartridge-brake-inserts-fixing-pins-y8a298060/
I assume these are the right inserts, but the bit about them being only for side wall machined rims is what I'm not sure about... how do I know if the rims are side wall machined? Even if they're not will the inserts be ok anyway? Are there other, better inserts that are compatible with these brakes that I don't know about? Or should I get some koolstop brake blocks instead? (trigger warning: very dirty bike)