Not sure if your second chart is ''better'' ed, as the first actually shows wheel diameter and the second one assumes a certain tire wide/deepness.
The colour on the outside of the rims is the width with different tyres - the MTB one is 736mm which come out to 29", hence the name.
@edscoble 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.
The colour on the outside of the rims is the width with different tyres - the MTB one is 736mm which come out to 29", hence the name.