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- Wolf Tooth Components 25mm Long B-Screw for A...
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Item #:
4141946
Wolf Tooth Components 25mm Long B-Screw for Adapting Old deraileurs When | bike-drivetrain-components
Item #:
4141946
NGN 22067
Price Details
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*All items will import from US
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In stock
Imported from USA store
QTY:
Only 11 items left in stock.
Order now and get it around Thursday, July 16
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High quality stainless steel screw is compatible with most Shimano mountain bike derailleurs.
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What Stands Out
Versatile Compatibility
Designed to adapt older derailleur systems, making it ideal for retrofitting or upgrading bikes with modern components and compatibility issues.
Durable Construction
Made from high-quality materials ensuring longevity and reliability, while handling the demands of varying riding conditions without compromising performance.
Easy Installation
User-friendly design allows for quick and hassle-free installation, enabling riders to make adjustments conveniently without requiring professional assistance.
Product Details
- Replaces stock B-limit screw on Shimano MTB derailleurs
- Compatible with most Shimano mountain bike derailleurs
- Used with Wolf Tooth GC 42 or GC 40 large cogs
- Made of high quality stainless steel
- Ensures proper adjustment when using replacement cogs
- 18-8 stainless steel screw for durability
| Item Dimensions | 4 x 2 x 0.25 inches (10.2 x 5.1 x 0.6 cm) |
| Thread Size | 4mm |
| Item Weight | 0.01 Pounds (0 grams) |
| Thread Coverage | Fully Threaded |
| Fastener Size | M4 x 25mm |
| Size Name | 4mm x 25mm |
| Item Diameter | 4 Millimeters |
| Compatible Groove Diameter | 4 Millimeters |
| Number of Pieces | 1 |
| Brand | Wolf Tooth |
| Color | Silver |
| Fastener Type | Screw (M4 thread size) |
| UPC | 812719020152 |
| Global Trade Identification Number | 00812719020152 |
| Set Name | Single Screw Set (M4 x 25mm) |
| Number Of Items | 1 |
| Part Number | BSCREW25 |
| Model | BSCREW25 |
| Unit Count | 1.0 Count |
| Manufacturer | Wolf Tooth |
| Included Components | Miscellaneous Rear Derailleur Part |
| Screw Head Style | Phillips |
| Screw Point Style | cylindrical |
| Head Type | Phillips |
| Thread Type | Metric |
| Set Screw Thread Type | M4 x 0.7mm |
| Thread Style | M4 |
| Thread Class | 2B |
| Maximum Shear Strength | 550 MPa |
| Grade Rating | Premium |
| Drive System | Bicycle Derailleur Drive System |
| Material Type | Multi |
| Exterior Finish | Stainless Steel |
| Metal Type | Stainless Steel |
| Finish Types | Stainless Steel |
| Material | Multi |
| Head Style | Phillips |
| Item dimensions L x W x H | 4 x 2 x 0.25 inches (10.2 x 5.1 x 0.6 cm) |
What's in the box
Miscellaneous Rear Derailleur Part
Who Should Buy?
-
Older Derailleur Users
Ideal for cyclists with older derailleur models needing adjustments for modern setups and ensuring proper shifting performance.
-
Bicycle Mechanics
Great for bike mechanics who often work on vintage bikes, providing more flexibility in compatibility with various components.
-
Customization Enthusiasts
Perfect for cyclists looking to customize their bike's shifting system, offering adaptability for different setups and efficiencies.
-
Modern Derailleur Users
Not suitable for users with modern derailleur systems that do not require the adjustment facilitated by this longer screw.
-
Casual Riders
Casual cyclists may not benefit from this product as they typically use standard components without needing adjustments.
-
Professional Racers
Professional racers usually prefer specific, high-performance components and may not require the flexibility of this screw.
Product Description
Have any Query? Chat with us
Customer Questions & Answers
-
Question:
Is this screw compatible with all Shimano derailleurs?
Answer: It is compatible with most Shimano mountain bike derailleurs. -
Question:
Is it easy to install?
Answer: Yes, it replaces the stock B-limit screw on Shimano MTB derailleurs. -
Question:
How durable is the stainless steel screw?
Answer: It is made of high-quality stainless steel, ensuring durability and reliable performance. -
Question:
Is this product compatible with Shimano Derailleurs (specifically a 105 10sp)?
Answer: It fit on a circa 2001 LX. -
Question:
Is this considered a Dropout screw for adjusting tire between stays?
Answer: No it is for adjusting the rear derailleur jockey wheel further from the cog. -
Question:
Will this work on Suntour Honor derailleur?
Answer: I believe all the B-screws are the same. -
Question:
Shimano Ultegra 6800 compatible?
Answer: Worked in my Shimano setup. -
Question:
Will this work on a pure fix frame?
Answer: This is a b limit screw designed to allow you to adjust the rear derailleur jockey wheel further away from the cogs to accommodate a larger cog. It may not be suitable for your application. -
Question:
What width or size is this M4? Thread type and length.
Answer: Take the old one to the hardware store and match the threads and size. They are metric. 25mm is long enough to adjust body angle of derailleur for clearance between biggest cassette cog and upper jockey wheel when in lowest gear.
Wolf Tooth Front Derailleurs Editorial Review
If you're looking for a replacement or upgrade to your derailleur's B-screw, the Wolf Tooth Components 25mm B-Screw is a compatible option for many Shimano and SRAM derailleurs. This M4 screw is longer than the standard ones to allow for better adjustment of the cage to the low cog angle, preventing contact between the guide pulley teeth and the low-speed cog. Customers have been satisfied with their purchases of the Wolf Tooth Components 25mm B-Screw, praising its perfect fit and well-made Construction. It is worth noting that some of the reviews seem to be about a completely different product (front floor mats for a BMW), so make sure to double-check that you're purchasing the correct item.
Customer Reviews & Ratings
243 customers ratings
-
5 Star
77%
-
4 Star
11%
-
3 Star
5%
-
2 Star
2%
-
1 Star
5%
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Pros
- Compatible with many Shimano and SRAM derailleurs
- Long screw allows for better cage adjustment to prevent contact between pulley teeth and low-speed cog
- Customers have praised its perfect fit and Construction
Cons
- Make sure to double-check that you're purchasing the correct item (some reviews seem to be about a completely different product)
Platform Trust & Buyer Confidence
MT
Mohd
Verified buyer
“The product received very good packaging & safe…Thank You”
16 June 2026 · via Trustpilot
SJ
Shawati
Verified buyer
“Accurate delivery timing given”
16 June 2026 · via Trustpilot
YB
Youcef
Verified buyer
“Not madly expensive like I thought, and much quicker than promised.”
15 June 2026 · via Trustpilot
LM
Leila
Verified buyer
“Never dealt with Ubuy before, but everything worked out great. Seamless cross border purchasing and shipping. Thanks!”
6/7/2026 · via Trustpilot
KA
Kwame
Verified buyer
“The process was smooth, with clear communication and timelines. This was my 1st purchase and I am really impressed. I will definitely be coming back.”
12 June 2026 · via Trustpilot
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NGN 22067
Order now and get it around Thursday, July 16
This item is not restrict in my country.(Please click on above link if this item is not restrict in your country, So our team will review and allow.)
QTY:
Only 11 items left in stock.
Secured transaction
Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.
Our Top Logistics Partners
Fastest cross-border delivery
Features & Benefits
- Compatible with most Shimano mountain bike derailleurs
- Replaces stock B-limit screw on Shimano MTB derailleurs
- Made of high-quality stainless steel
- Specifically designed for use with Wolf Tooth GC 42 or GC 40 large cogs
- Ensures proper adjustment when using the replacement cogs
- Guarantees durability and reliable performance