Hollowtech 2 Gap?

[Thomk]

The spacer is only for triples. Dont ask me how I know this

How do you know that?

 

[phil_hg_uk]

It's here:
http://techdocs.shimano.com/media/t.../FC/EV-FC-3550-3413_v1_m56577569830799977.pdf
Doesn't look like there are spacers. I guess the O ring AP mentioned is number 5 which I'll check for in the morning. So does that mean the gap is normal?

Hmmm strange the double/compact doesn't have the spacer and the triple does ( which is what mine is so explains why mine has one and not yours ) I would have expected the opposite.

So seems like yours is ok then

 

[Sittingduck]

Longer spindle on a triple to incorporate the additional chainring. The spacer fills the gap on the non drive side

 

[Sittingduck]

Also... never fit a dbl and spacer or the crank arm will fall off!

 

[phil_hg_uk]

Longer spindle on a triple to incorporate the additional chainring. The spacer fills the gap on the non drive side

I know what you mean but it is one of those things that my brain cant visualize at this time of night if you know what I mean.

 

[Thomk]

That makes sense. So......why is there a gap on my compact non drive side???

 

[Thomk]

Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.........going to bed!

 

[phil_hg_uk]

Ahhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh.........going to bed!

 

[Sittingduck]

Dont worry about a small gap as long as the plastic clip has dropped down into position... the one in the middle of the 2 pinch bolts.

 

[Sittingduck]

^ that and theres no lateral play in the crank/bb

 

[400bhp]

Looks fine to me

 

[e-rider]

HTII road BBs don't use any spacers unless it's for a triple.
The o-ring that has been mentioned is factory fitted to the cranks, and isn't something that needs to be worried about.
Make sure the BB cups are tight to the correct torque.
The crank appears to not be sitting far enough onto the BB axle, release the 2 allen bolts, and see if the crank will slide on further, and then tighten allen bolts again. I agree that the gap appears to be too big, but if the BB shell of the frame is a few mm too short (i.e. someone has been heavy handed when facing it) this could explain the larger gap and there would in that case be nothing you can do about it.
Don't know what all this talk of being cross-threaded is all about!!!!!
Is that an Ultegra 6700 chainset too?

 

[Cletus Van Damme]

I just fitted a Tiagra Hollowtech 2 triple chainset to my bike today. The triple has a 6.5mm on the drive side (is already in place on the crank), the non-drive side has a 3mm included to fit. I was a bit confused as the tech doc mentioned some ring or something that was not included with the chainset for the non-drive side. This website clarified it for me and it works fine, never had to adjust the front mech or anything. If it's a compact I am not sure.

http://www.universalcycles.com/shopping/product_details.php?id=41962&category=2634

 

[Thomk]

Is that an Ultegra 6700 chainset too?

It's Sora.

 

[e-rider]

It's Sora.

although all Shimano 'road' HTII BBs and chainsets should be compatible, IME if you mix them, things like the 'little gaps' you have had trouble with do seem to appear - I always keep the chainset and BB matching for this reason.