microSHIFT Mezzo M36 Rear Derailleur - 89 Speed Long Cage Black ModelNumber=E4553 }MRP Progressive Rear Shock Coil

}MRP Progressive Rear Shock Coil Spring 129mm Long 65mm Maximum Stroke 450+ Pound Spring Weight

Minimum Head Tube to Seat Post Measurement: 20"

8mm clamp 25mm rise 73-degree backsweep

}Ritchey Comp 1" Threaded Headset - EC30/25

Spring Weight 550 Material Steel I

microSHIFT Mezzo M36 Rear Derailleur - 89 Speed Long Cage Black ModelNumber=E4553 }MRP Progressive Rear Shock CoilmicroSHIFT Mezzo M36 Rear Derailleur 89 Speed Long Cage Black. M series rear derailleurs are designed to work with 8 and 9 speed Shimano compatible mountain and road shifters. These Mezzo rear derailleurs are light robust and reliable. You can count on them to get any bike on the road. Weight saving aluminum bracket body and outer link Steel pulley cage for extra chain rub durability Compatible with Shimano 8 and 9 speed mountain and road systems TECH