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Bottom Bracket Help!!!

Bruce0286Bruce0286 Posts: 8
edited February 2018 in MTB workshop & tech
Morning All,

I've spent a couple of hours yesterday fitting my SLX M-7000 11 Speed RD, Sunrace 11-46 Cassette and SLX M-7000 Shifter and SRAM X1 11sp chain all is working well considering at the moment I am just using the middle 34t Chainring of my original chainset. But I know this is less than ideal and the "backpedal" issue is quite exagerated on this setup. I have a replacement bottom bracket (MT800), SLX crankset and SLX 34t chainring. My current chainset does not have removable chainrings so I need to change this.

My confusion comes in that a lot of advice online recommends facing of the BB Shell before fitting the new BB as I currently have a Square Taper BB. I contacted a highly recommended, reputable LBS and was surprised when I asked about facing they said they don't do it as it's not needed?! I even confirmed I was going square taper to hollowtech and they said nope they've done many and never faced any.

This seems at odds to what I've read online but this LBS is one that pops up countless recommendations by word of mouth and online.

If I'm doing this, I want to do it properly. What's everyone's thoughts on this?

Thanks in advance.

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