You are reading a single comment by @Chalfie and its replies.
Click here to read the full conversation.
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.
@Chalfie
Possibly, the R number is calculated by a number of different modelling groups in different places. And then discussed to get the range this number might be within.