Piece 合金製チェーンリング＆スパイダー 39T 1/8Inch ブラック＆ブルーアルマイト加工スパイダーCNC 機械加工されたシルバーの歯とゴールドのボルト マウンテンバイク用アップグレード 耐久性と高性能を兼ね備えた

39T One-Piece Alloy Chainring & Spider for BMX Bikes
✔️ Single-piece alloy chainring with CNC teeth and blue/black spider

This is a 39-tooth alloy chainring and spider designed for BMX, dirt jump, and freestyle riding. It is built for 1-piece cranks and compatible with 1/2" x 1/8" chains (12.7 mm x 3.175 mm), delivering solid power transfer and dependable performance on streets, parks, and tracks.

✅ 39-tooth aluminum chainring with CNC-machined silver teeth
✅ One-piece alloy construction provides stiffness and durability
✅ Anodized spider in black with blue accents and ED gold bolts
✅ 1/2" x 1/8" chain compatibility for BMX, dirt jump, and freestyle
✅ Compatible with 1-piece cranks for easy install and reliable power transfer

💡 What is a 39T one-piece chainring and why should I consider it for BMX and mountain bikes?

A handy upgrade for riders seeking strong, reliable power transfer. - improves power transfer with a rigid one-piece setup - CNC-machined teeth enhance engagement and wear resistance - anodized black/blue finish with ED gold bolts for style and longevity - compatible with 1-piece cranks and 12.7 mm x 3.175 mm chains