BMC V2 with 8 speed freewheel?

[dscline]

From what I've read, it will accommodate a 7spd, but an 8spd might require spreading the rear triangle. I don't want to do that, as mine is aluminum, but I do want to confirm the 8spd won't fit before I order. I've put the motor on the frame, and it seems to fit well... the flattened portions of the axle just fit within the dropouts, with the round portion of the axle taking up all the space between the dropouts. So, I assume an 8sp freewheel goes past the round portion of the axle, requiring a washer or something to provide additional space? Can anyone confirm?

Thanks!

 

[mwkeefer]

dsc,

you need an inside washer (between the flattened parts of the axle and the inside of the dropout) and an outside washer. You shouldn't need to bend the frame / forks ... if it just fits now your talking about wedging 1.5mm - somthing i do atleast once daily even with aluminum and magnesium forks and such.

As far as I know the 9SP, 8sp and 7SP should be the same width - the difference is in the spacing of the sprockets (I could have that wrong it might be 7sp and 9sp same, 8sp thinner?)...

In either case, why not order both freewheels?

Or to save a buck, add the proper washers on the axle flats, insert into dropouts and then bolt it up and measure the clearance... one other issue.... measure the threaded flange on the drive side. The threads sometime won't seat fully into a freewheel if it's not deep enough which leaves 1/2" or more gap from the hub face and causes less useable area before dropout.

And yes - after the freewheel... if the axle flat is inside the cup (it will be) you must add washers and finish with the double D inner torque washer before putting it in the dropouts.

-Mike