BK on Instagram: “I've covered this before, but just wanted to touch again on how important B gap is (distance between upper pulley wheel and cassette), as…”
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Amazon.com : Rear Derailleur Adjuster, Chain Gaps Adjustment Gauge Tool for SRAM Eagle GX NX 12 for Hiking, Road, City, Mountain Bicycles and Racing Bicycles : Sports & Outdoors
![Top jockey wheel keeps rubbing on 34t cassette ring on my daughters 7 speed. Can't for the life of me figure out how to fix it. More details in comments. : r/bikewrench Top jockey wheel keeps rubbing on 34t cassette ring on my daughters 7 speed. Can't for the life of me figure out how to fix it. More details in comments. : r/bikewrench](https://external-preview.redd.it/FsQSpkA3WOjuxSUP-VMZqr4Xz9-fd4aiBMw13aL_FJs.jpg?auto=webp&s=8671a0c18626babb1dc62cbd1dcbe68b2a787805)