Deore M5100 11 Speed Rear Derailleur Color:Black It should protect your head

It should protect your head

integrated accessory mounting solution

Weighing a third less than the closest competitor

And because you love to ski all day

Deore M5100 11 Speed Rear Derailleur Color:Black It should protect your headShimano Deore RD M5100 11 Speed Rear Derailleur Unlock the versatility of wide range 11 speed gearing with the Shimano Deore RD M5100 11 Speed Rear Derailleur. Designed to pair with the Deore CS M5100 11 51t cassette, this derailleur has a huge capacity which enables it to smoothly shift in and out of that monster 51t cog. Shimano's Shadow Plus design creates a low profile to help prevent damage from rocks and trail debris. Chain stabilising