Sram Red E1 Flattop 12Spd 114L Rainbow Chain Dirtjumper Shimano BB-UN300 Square Type 118

Shimano BB-UN300 Square Type 118 x 73mm (BSA)

3% Elastane

An extremely cut-resistant and abrasion-resistant material added to the sidewalls of select mountain tires

Upper Construction: Water-resistant

Battery Capacity (mAh): 650

Sram Red E1 Flattop 12Spd 114L Rainbow Chain Dirtjumper Shimano BB-UN300 Square Type 118We took the lightest and most durable chain weve ever made and made it lighter. With no compromises. Our HollowPin construction is lighter and stronger than a solid pin, and cutouts in the outer and inner plates drop 13 g from the previous generation. Can a chain really be lighter, faster, stronger and more durable than anything else? This one is. Flattop technology enables a narrower chain with quieter operation and increased strength and durability