This thread deserves to be kept going. The XT BR-M732 cantilevers setup with Shimano 125mm link wires work best with BL-6401 levers, which have a pivot radius of 18mm. As I understand it, these were 1st generation SLR. Unfortunately hoods are unobtanium. I don't have a set of BL-6402 to compare, but the BL-6403 are labeled "Super SLR" and have a larger, harder to measure, radius.


Shimano BL-6401 (1988-1990)

• 18mm (Pivot radius)
• 6.3mm (20deg pull)