Joined
·
531 Posts
I am mounting Shimano chainings to a Race Face Atlas crank, along with an E-13 DRS chainguide. The inner and middle Shimano chainrings are 24 and 36 teeth, respectively. They were the only rings I could find in the these sizes, which is what I wanted to run instead of the stock RF rings.
First, the middle ring would not fit because RF added raised guides on the crank for their rings which interfere with any other manufacturers' rings (probably done on purpose). I solved this problem by filing them down.
Next issue, the inner ring could not be oriented the right way because it made the chainring spacing too close, so I had to flip it around and use 2mm chainring spacers in the countersunk holes of the ring. That gave me the proper spacing.
So I thought everthing was good...until I went to mount the crankarm. Now the chainring bolt heads hit the E-13 plate before the crank bottomed out on the spindle. Great.
So I added another 1mm spacer on the spindle and a 2.5mm spacer between the bb cup and E-13 plate, which seems to work.
My question is (finally): Is having the chainguide plate AND a 2.5mm spacer between the bb shell and external cup too much? In other words, are there sufficient threads engaged to not worry about the potential for stripping the bb? RF instructions shows only up to one on each side being used for a 73mm bb shell width.
I really want this to work. The alternative is to look for another 24 tooth inner chainring which I seem to have a hard time finding. Any recommendations would be greatly appreciated.
First, the middle ring would not fit because RF added raised guides on the crank for their rings which interfere with any other manufacturers' rings (probably done on purpose). I solved this problem by filing them down.
Next issue, the inner ring could not be oriented the right way because it made the chainring spacing too close, so I had to flip it around and use 2mm chainring spacers in the countersunk holes of the ring. That gave me the proper spacing.
So I thought everthing was good...until I went to mount the crankarm. Now the chainring bolt heads hit the E-13 plate before the crank bottomed out on the spindle. Great.
So I added another 1mm spacer on the spindle and a 2.5mm spacer between the bb cup and E-13 plate, which seems to work.
My question is (finally): Is having the chainguide plate AND a 2.5mm spacer between the bb shell and external cup too much? In other words, are there sufficient threads engaged to not worry about the potential for stripping the bb? RF instructions shows only up to one on each side being used for a 73mm bb shell width.
I really want this to work. The alternative is to look for another 24 tooth inner chainring which I seem to have a hard time finding. Any recommendations would be greatly appreciated.
Attachments
-
98 KB Views: 377
-
64.6 KB Views: 358
-
92.8 KB Views: 420