Chaingangs are always a good idea. You will get faster riding them and your road craft will improve.
Unless they are slower and/or too fast and you're better off doing focused solo training for that rather long, solo event he's training for.
Indeed. I'd only do a chain gang if I was bunch racing
Also, people with aerobars in bunches >>>
@Ste_S started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Unless they are slower and/or too fast and you're better off doing focused solo training for that rather long, solo event he's training for.