You need the 'type' of spyder sizing. I run 5 bolt Standard, usually they are measured in mm from the bolt hole centers?
One note- I've only seen increments of 10-12 T being the jumps for one ring to the next.
Are you going to be able to shift off the mid to the 53? A 6T increase in jump will probably shift awful?
Last edited by jeff williams; 11-02-04 at 05:00 PM.