Wheels Manufacturing Derailleur Hanger - 123 MFPN=WH21AERBST30SHI1227. The Asthma mask comes with

The Asthma mask comes with two sport/asthma filters

Waxless Positrack base features a positive base structure for the best blend of kick and glide in all snow conditions

Misc RLC Remote 120mm Max Travel

eighty percent of the work to create a frame is done

6061 T6 machined aluminum cups are lightweight and durable

Wheels Manufacturing Derailleur Hanger - 123 MFPN=WH21AERBST30SHI1227. The Asthma mask comes withWheels Manufacturing Derailleur Hanger 123. Wheels Manufacturing hangers are stiffer than almost any OEM hanger which improves durability and shifting performance. OEM hangers are only produced by a handful of manufacturers mostly in Taiwan and China. As a result you will see many bikes with exactly the same hanger. Bicycle manufacturers may make mid year changes. Please use the hanger photos to select the proper hanger for your application. CNC