Wolf Tooth Components 25mm Long B-Screw for Adapting Old deraileurs When

Made my GRX derailleur work with a bigger cassette than recommended, excellent stuff.

Fits my GRX RX400 derailleur to improve clearance with a 11-42t 10 speed cassette for a 1x conversion on my topstone. Wish it was black like the original screw but oh well no biggie.

Exactly what I needed for a 9 speed SLX derailleur to run a larger 40T granny gear. Nice Allen head with good threads and fit.

Look it's a screw it works perfectly the problem is they just throw the tiny screw in a large envelope and ship it one little hole in the package and goodbye screw and that's exactly what happened to the 1st shipment they sent me another with no questions askef but it took twice as long to get it

I used this to replace the B limit screw on my Shimano derailleur after it was bent in a particularly muddy mountain bike race. It works perfectly!

If you want to thumb your nose at Shimano’s claimed largest sprocket size, get this. As long as your derailleur hanger has a large-enough flat for it to bear against, it will work fine for up to 40- or 42-tooth cogs. Some people turn it around, so the head of the screw meets the land to provide support.

I really really really need to stop shopping on Amazon when I'm tired or stressed. Something very similar can be purchased at your local hardware store for a fraction of the price. In fact, I purchased a bag of three AT A LOCAL HARDWARE STORE for less than $2. Wold Tooth sells over priced items - most of which can be purchased elsewhere for much much less. Do yourself a huge favor and be a smarter shopper than I was in this particular item. The information is out there for anyone willing to realize Wolf Tooth products are nothing special.

This product work like a champ it got me to be able to adjust my Shimano deore rear derailleur so that it wasn't contacting the ultra-large range cassette gear ... I chose the 11:00 my 46 tooth sunrace 10 speed cassette to do a one by conversion.... And without the screw the derailleur would have hit the largest gear.... That's what all screw didn't seem like it but it's save the day must have for one by conversions with large rear cassettes

The Wolf Tooth 25mm B-Screw might seem like a tiny, unassuming component, but it makes a huge difference in your bike's drivetrain setup. If you’ve got a Shimano derailleur and are looking to ensure proper derailleur alignment, this B-screw is a must-have. Made from durable materials, it’s designed to provide precision adjustment for your derailleur cage, giving you cleaner shifts and better chain management. It’s especially helpful if you’ve recently swapped to a wide-range cassette or if your original B-screw has worn down. Final Verdict: 9/10 – Simple, effective, and well-made. A small upgrade that improves your bike's performance. 🚴‍♂️🔩