You want a 140mm adapter for the back unless you're changing the rotor size too.
Thanks, the Juin Techs come with rotors so it's cheaper to add them on - the ones on there are also rather awful.
@spinnnout started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
You want a 140mm adapter for the back unless you're changing the rotor size too.