Hilary Stone wrote: "My son Keir is using a 150mm Gran Sport 3-arm set on his ride to school bike - as a short term measure until I fit a set of shortened cranks"
The "Zeus" juvenile track bike that I will bring to Cirque has 150 mm TA cranks, and we had either 150 or 155 TA on our triplet when the boy was that size.
harvey sachs
mclean va