Thanks to Rick he brought over a new shaft for Neil's wheel balancer. When some asked what 375 was I said 3/8". But on comparing the two shafts the original is larger. So I measured it and it came out at 15/32" or .48". It probably is metric and that works out to 12mm. So it might work out with the smaller shaft and that is something we will have to find out. Cheers
