Shimano Frame Requirements manual

[schollen]

Does anyone know where to find the latest shimano frame requirements manual. I found this one:

2009_Cover

but that only has info on the br-r550 canti brake. i purchased the br-cx50 brake. I need to know the required boss spacing and distance from axle. can i just assume the same dimensions as br-r550? the pdf states that i can mount the bosses as close as 65 mm but everything else i read recommends 80 mm. 80mm is too big for my ss spacing if i am going to mount the boss 283 mm from the axle. i can do a 75 mm boss spacing, which looks like it would be fine for the br-r550 but need to make sure it will work with the br-cx50.

Scott

[Andrew R Stewart]

015_12A.jpgThe simple thing to do is to mock up the arrangement.

If you find that the best post c-c dimension (whatever that means to you) places the post bases in a position that doesn't work with the frame tubes then you need to get creative. You either change the canti (and also the c-c), you change the frame design OR you change the way the post base is attached to the frame.

I've used a piece of tube that fits over the canti base increasing the potential surface area that contacts the frame. Attached is a shot. I have considered making a short "stand off" tube that the post base would attach to but have not needed to yet.

I prefer cantis that use a smooth post pad mount as they have a lot of adjustment range. Andy.

[NBC]

measure the cantis and your rim width ie...

brake pad height (with the spacer thingy) call this A
distance from the inner face of the brake arm to the centre of the pivot (parallel from the inside brake arm face) call this B
rim width call this C

2a + 2b + c = stud spacing

hope it makes sense

NBC

[schollen]

Thanks for the quick replies. I also ended up calling shimano to confirm what i measured. after about an hour of trying to track down the right person to get me the info I needed I was able to get the following doc sent. They were not able to send me the hole manual because I am not an official shimano buyer or something to that tune.image008.png

[Noize]

Hi,

bringing this thread up again...

Does anyone know where to find frame requirements for Shimano Di2 components?

thank you,

Ernst

[Tristan]

Hi,

bringing this thread up again...

Does anyone know where to find frame requirements for Shimano Di2 components?

thank you,

Ernst

What specifically are you looking for? There isn't anything di2- specific to the best of my knowledge