Finally got some Saint cranks from Shimano the other day, and had a chance to fit them up with one of our guides. Some slight mods are necessary, but it will fit up. The only big problem I can foresee is that the effective spindle length (as far as chainguide spacing is concerned) is 113 mm. This makes for a pretty sick chainline, but it spaces the boomerang so close to the frame that there will likely be problems with tire rub and boomerang/frame interference.
Anyway, here are my notes from the install:
Modifications for use with SRS:
-You need to slightly file out Center hole on boomerang (~.5mm) to allow the Saint bearings to pass through the boomerang. Interestingly, the OD of the bearing assembly on the BB is the exact same as the ID of the boomerang hole.
-You need to slightly file down the crank slot on bashring (see photos) to allow the gi-normous crank arm to fit into the bashring.
-You need to slightly file down granny bosses on crank to keep from rubbing on the back plate.
-You need to ditch the Saint Chainring, as it won't really fit on the back of the spider (only really fits on the front of the spider, where the bashring is supposed to be).
Other Notes from the install:
-You need special tools for tightening the BB shells and the weird little bolt that tightens down the whole system at the BB axle/non driveside crank interface. Shimano did not supply either of these.
-Stock BB spacing appears to be similar to a 113, which puts the boomerang very close to the frame - expect tire rub and boomerang/frame interference problems unless BB spacers are used.
-The stock chainring only works on the outer position of the spider
-Weight of the Saint system: 2.2 lbs. (for comparison, I weighed a profile setup with a cromo spindle and it weighed 2.4 pounds).
I think that's about it for now. I'll attach some photos.
--JP
Anyway, here are my notes from the install:
Modifications for use with SRS:
-You need to slightly file out Center hole on boomerang (~.5mm) to allow the Saint bearings to pass through the boomerang. Interestingly, the OD of the bearing assembly on the BB is the exact same as the ID of the boomerang hole.
-You need to slightly file down the crank slot on bashring (see photos) to allow the gi-normous crank arm to fit into the bashring.
-You need to slightly file down granny bosses on crank to keep from rubbing on the back plate.
-You need to ditch the Saint Chainring, as it won't really fit on the back of the spider (only really fits on the front of the spider, where the bashring is supposed to be).
Other Notes from the install:
-You need special tools for tightening the BB shells and the weird little bolt that tightens down the whole system at the BB axle/non driveside crank interface. Shimano did not supply either of these.
-Stock BB spacing appears to be similar to a 113, which puts the boomerang very close to the frame - expect tire rub and boomerang/frame interference problems unless BB spacers are used.
-The stock chainring only works on the outer position of the spider
-Weight of the Saint system: 2.2 lbs. (for comparison, I weighed a profile setup with a cromo spindle and it weighed 2.4 pounds).
I think that's about it for now. I'll attach some photos.
--JP