CHAINS

The Specialized VADO 5.0 SL uses a 12-speed setup and the VADO 4.0 uses an 11-speed setup. Doug Depew found the alternative Shimano 105 CN-HG601-11. The outer link for an 11-speed is standardized at 5.65mm and the 12-speed 5.25mm. Doug says the 11-speed will work for the 12-speed set. Check below our Chains research IF HE IS CORRECT (apparently not, see below)

https://fogebike.blogspot.com/p/chains.html  

WARNING: Doug found his Shimano CN-HG601-11 bound up on his 12-speed cassettes. He was to switch to the recommended CN-M7100-12.