RT-1 fits 1"

and the (thankfully) almost extinct 1-1/4" crown races

This is a non directional chain so you don't have to worry about which way to put it on and it comes with a MissingLink

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Durable: 18/8 Stainless steel with powdercoat finish

Bikeyoke Revive 3 Dropper Post - 31.6mm - Internal - Stealth - 160mm Drop - 430mm Length - Silver - No Remote Supplied Exclusive RT-1 fits 1"The new REVIVE 3. 0 is the latest evolution of Bikeyoke's flagship model, benefitting from already very successful 10 years of experience with its predecessors. They didn't touch anything proven, and so the famed reliable and buttery smooth hydraulic system remains untouched, yet we have succeeded in making our multiple award winner even better. The most important features and highlights of REVIVE 3. 0 include: new saddle clamps for a 5mm lower stack