Originally Posted by
ddcfamily
seems like Gary Turner's idea might of panned out - the rise of the 27.5 at least gives me some options for new tires.
The so called 27.5 tires are 650b with a BSD of 584 mm 700d have a BSD of 587 mm. That's close enough for tubes. Tubes are often labeled for 700c BCD of 622mm and 27" BCD of 630 mm. However for tires it's not the same you need the correct tire.