Post and cradle are machined from one piece of 700 aluminum

the Sentry MK3 s patented low-profile sidewall and lightweight 6069 alloy construction delivers width without the weight

4-bolt faceplate design for easy installation

Weight: 170g (Pair)

Compatible with the included baseplate and 36 degree integrated crown races

Sram MRX COMP Mechanical Right Shifter 8-Speed can be discounted Post and cradle are machinedWhether your ride of choice includes gently rolling terrain or fast down hill descents, the MRX will follow you there with crisp, positive response on your shifts. Compatible with Shimano rear derailleurs Six, seven, and eight speed shifters available 2: 1 ratio Mountain Bike