B Gap Adjustment Tool for SRAM XPLR/AXS Eagle Chain Gauge, Rear Derailleur Chain Gap Tool for MTB [White-Eagle 50/52t Cassettes, 12 Speed], Road [Red-XPLR Force Rival Red eTap AXS 26-44]

simple and effective. just the tool i needed and a great price. seems sturdy for as few times as i’ll probably need it

Once I figured out where to place it, it worked perfectly to adjust the b-screw on my SRAM derailleur. YouTube videos were greatly helpful.

Why did you pick this product vs others?:Very easy to use and takes the guess work out

Overpriced for what it is

Similar to my genuine one that I broke

If you're using the new AXS system there's not much to adjust. But setting the B gap is key to making sure the system is working correctly. My new bike came set up but was skipping, missing and being funky in the 4-6 cog range and the hanger had never touched the ground. I didn't think this was the issue but checked anyway and sure enough, the B-gap was way off. Once set the shifting was flawless, smooth and quick. The right tool for the job.

This is way nicer than any other B-gap tools, even the those that come with a derailleur purchase. It just clips on the cassette and you just adjusted your B-gap until the axle of your top jockey wheel is centered in the hole on the tool. It’s all plastic and very durable. You don’t need two hands to hold the tool, once it’s clipped on the largest cog of your cassette you can let it go and it won’t fall off. It’s easy to see as you are turning your B-gap screw when the jockey wheel axle is in the center hole. For 12speed, 50-52t cassettes only.

Setting the rear suspension to sag before measuring using this tool is crucial but a pain in the butt for one person to do alone. I ended up airing down my shock and then using zip ties to hold the rear triangle at sag.