{"product_id":"wolf-tooth-b-screw-rear-derailleur-small-parts-mountain-bike-rd4700","title":"Wolf Tooth M4 x 25mm Stainless Steel B-Screw for Shimano Derailleurs \u0026 GC Cog Adaptation - High-Performance Drivetrain Upgrade","description":"\u003cdiv id=\"seqbpdescription-1\"\u003e\u003cp\u003eUpgrade your Shimano rear derailleur compatibility with the Wolf Tooth 25mm B-Screw for GC Cogs - the essential accessory for precise shifting when adapting older derailleur models. Crafted from high-quality 18-8 stainless steel, this durable and corrosion-resistant B-screw measures 25mm in length (M4 x 25mm), providing the perfect extension needed when using the GC 40 or GC42 cogs with Shimano derailleurs.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-2\"\u003e\u003cp\u003eDesigned for cyclists seeking seamless compatibility and optimal drivetrain performance, this longer B-screw ensures reliable gear shifts, reducing frustration and enhancing long-term drivetrain efficiency. Its silver finish offers a sleek, corrosion-resistant surface that complements any bike's aesthetic.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-3\"\u003e\u003cp\u003eInnovative and performance-driven, the Wolf Tooth B-Screw is an ideal component for bike enthusiasts aiming to maximize their drivetrain versatility. Please note: this B-screw is not required when using the GoatLink, which is highly recommended for improved shifting and drivetrain longevity with Shimano rear derailleurs. Compatible with select Shimano models-be sure to verify your derailleur compatibility on the GoatLink product page.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-4\"\u003e\u003cp\u003eKey Features:\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-5\"\u003e\u003cp\u003e- Material: High-Quality 18-8 Stainless Steel for durability and corrosion resistance\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-6\"\u003e\u003cp\u003e- Length: 25mm (M4 x 25mm) to accommodate GC 40 \u0026amp; GC42 cogs with Shimano derailleurs\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-7\"\u003e\u003cp\u003e- Compatibility: Designed for use with GC cogs and specific Shimano rear derailleurs\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-8\"\u003e\u003cp\u003e- Color: Silver for corrosion resistance and aesthetic appeal\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-9\"\u003e\u003cp\u003e- Weight: 2.5g for lightweight performance\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpdescription-10\"\u003e\u003cp\u003eEnhance your bike's shifting performance with the Wolf Tooth 25mm B-Screw - the reliable upgrade for adapting old derailleur setups to modern, high-performance cycling gear. Perfect for mountain biking, gravel riding, and bike touring where precise gear control is essential.\u003c\/p\u003e\u003c\/div\u003e\u003cdiv id=\"seqbpfeatures\"\u003e\u003cul\u003e\n\u003cli\u003eExtended 25mm length B-screw crafted from high-quality 18-8 stainless steel for durable and corrosion-resistant performance.\u003c\/li\u003e\n\u003cli\u003eDesigned specifically to adapt Shimano rear derailleurs with GC cogs, ensuring precise alignment and reliable shifting when using longer B-screws.\u003c\/li\u003e\n\u003cli\u003eOptimized for use with the GC 40 and GC42 cogs, this B-screw enhances compatibility and drivetrain clearance, supporting seamless integration with your existing bike components.\u003c\/li\u003e\n\u003cli\u003eLightweight at just 2.5 grams, this M4 x 25mm stainless steel screw offers easy installation and long-lasting performance for upgrading older derailleurs or custom setups.\u003c\/li\u003e\n\u003cli\u003eCompatible with most Shimano rear derailleurs, this upgrade helps improve long-term shifting performance and prolongs drivetrain longevity, especially when paired with the recommended GoatLink upgrade.\u003c\/li\u003e\n\u003c\/ul\u003e\u003c\/div\u003e","brand":"Wolf Tooth","offers":[{"title":"Default Title","offer_id":42208449921091,"sku":"RD4700","price":2.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1608\/6187\/files\/RD4700.jpg?v=1779349175","url":"https:\/\/365cycles.com\/products\/wolf-tooth-b-screw-rear-derailleur-small-parts-mountain-bike-rd4700","provider":"365 Cycles","version":"1.0","type":"link"}