What are these for?

[Salty seadog]

These came in the box of bits with my specialized roubaix carbon disc. The top yellow part is in a bag with what look like cable end crimps. The other part is a small metallic square, the white patch on one side feels like foam.

I have no idea what they are for, any ideas?

 

[Yellow Saddle]

The round brown thing is for buying stuff.
The yellow thing is a placeholder for brake pads. You replace the brake pad with that when you bleed the brakes. This ensures that you have the correct simulated pad thickness at bleed time which in turn ensures the correct fluid level in the reservoir. It also prevents oil from getting onto the pads.
The little silver thing with a sticky thing on the back is a backing plate for the front derailer. Modern front derailers are tuned "tail-out" and this is achieved by a screw that presses against the frame. If you have a carbon frame, this screw will damage the frame. On metal frames it is usually not required.

 

[Nibor]

The big yellow bits are to put in your brake calipers in place of your pads while you are bleeding them to keep the Pistons in the right place

 

[bonsaibilly]

The round brown thing is for buying stuff.
The yellow thing is a placeholder for brake pads. You replace the brake pad with that when you bleed the brakes. This ensures that you have the correct simulated pad thickness at bleed time which in turn ensures the correct fluid level in the reservoir. It also prevents oil from getting onto the pads.
The little silver thing with a sticky thing on the back is a backing plate for the front derailer. Modern front derailers are tuned "tail-out" and this is achieved by a screw that presses against the frame. If you have a carbon frame, this screw will damage the frame. On metal frames it is usually not required.

On my carbon bike when it came, those little frame protector pads were still in their baggies. I queried it with the shop and they said, don't worry on the frame of my bike they weren't needed because the derailleur mount protected the frame anyway. I had a look and it did indeed appear to be the case, so I haven't worried. I presume they have no effect at all on the actual gearing? BB

 

[Pale Rider]

Magura call their version a 'transport device' - handy to stuff in the calliper if you are transporting the bike with the front wheel removed.

The Magura one also does lots of other things, as listed here:

https://www.rosebikes.co.uk/article/magura-transport-device/aid:786960

 

[Yellow Saddle]

On my carbon bike when it came, those little frame protector pads were still in their baggies. I queried it with the shop and they said, don't worry on the frame of my bike they weren't needed because the derailleur mount protected the frame anyway. I had a look and it did indeed appear to be the case, so I haven't worried. I presume they have no effect at all on the actual gearing? BB

11-speed FDs are very sensitive to the orientation of the two parallel plates vis a vie the chain. Unlike 10-speed where we simply eyeballed it to get them parallel with the chain when it was in a perfect chainline, 11-speed needs to be adjusted so that the tail swings out slightly - say 5 degrees, IIRC. To help you fine-tune this position, the FD has a little grub screw that pushes against the seat tube and works against the clamping force of the main clamp, to get the swing just right. The landing pad of this little screw is the frame itself. The protective plate may or may not help in that regard and indeed, as you say, some frames may even have such a landing pad built in.

Keep your little pad in a drawer in your garage and throw it away in 2019 with other bits and pieces such as brake reach shims and other things you can't remember what they were for but still looks so valuable because they're neatly packed in their own little plastic bag.

 

[bonsaibilly]

IIRC, on mine, the (metal) derailleur mount is riveted onto the frame and serves to protect the frame.

I have had a fair bit of trouble with my 11 speed bike including the FD out-swing you refer to, which I still haven't sorted, and I far prefer the 10 speed bike which until recently has never needed adjusting.

 

[Yellow Saddle]

IIRC, on mine, the (metal) derailleur mount is riveted onto the frame and serves to protect the frame.

I have had a fair bit of trouble with my 11 speed bike including the FD out-swing you refer to, which I still haven't sorted, and I far prefer the 10 speed bike which until recently has never needed adjusting.

It is worthwhile downloading the instructions from the Shimano site. The swing-out needs to be precise but IIRC Shimano publishes a fairly foolproof way of getting it right. It involves putting the chain in specific gears and then adjusting the swing-out a precise distance. Shimano's opposition, SRAM tackled the problem by making the FD swing by itself. That of course comes with its own set of problems and expenses but whether it is better, I can't say. I do agree that older ones were less finicky.

 

[winjim]

11-speed FDs are very sensitive to the orientation of the two parallel plates vis a vie the chain. Unlike 10-speed where we simply eyeballed it to get them parallel with the chain when it was in a perfect chainline, 11-speed needs to be adjusted so that the tail swings out slightly - say 5 degrees, IIRC. To help you fine-tune this position, the FD has a little grub screw that pushes against the seat tube and works against the clamping force of the main clamp, to get the swing just right. The landing pad of this little screw is the frame itself. The protective plate may or may not help in that regard and indeed, as you say, some frames may even have such a landing pad built in.

Keep your little pad in a drawer in your garage and throw it away in 2019 with other bits and pieces such as brake reach shims and other things you can't remember what they were for but still looks so valuable because they're neatly packed in their own little plastic bag.

I don't recall my Campagnolo front mech doing that. I put it on, it works. Beautifully, no fiddling required. I do have the brake lever shims in their little baggy in a drawer somewhere though.

 

[Yellow Saddle]

I don't recall my Campagnolo front mech doing that. I put it on, it works. Beautifully, no fiddling required. I do have the brake lever shims in their little baggy in a drawer somewhere though.

You are right of course. Please insert "Shimano" between the words 11-speed and FDs in the first sentence of my reply. Remember to still empty that drawer in 2019. Even Italian bits and pieces must eventually go to heaven.

 

[winjim]

Remember to still empty that drawer in 2019. Even Italian bits and pieces must eventually go to heaven.

Yeah, but you never know, they might come in handy. You should see our lab, we've only just got rid of a load of compounds that one of my predecessors synthesised before I was even born. Because, well, we might have found a use for them...

 

[winjim]

[QUOTE 4351626, member: 45"]What does this bit do?....

[/QUOTE]
Dunno, but stick it in the drawer just in case.

 

[bonsaibilly]

[QUOTE 4351626, member: 45"]What does this bit do?....

[/QUOTE]
If it costs more than £500 it will make you be quicker.

 

[Yellow Saddle]

[QUOTE 4351626, member: 45"]What does this bit do?....

[/QUOTE]
Dunno, bit it sure looks "fast rolling" and very responsive.

 

[Heisenberg71]

The big yellow bits are to put in your brake calipers in place of your pads while you are bleeding them to keep the Pistons in the right place

Why would anyone be bleeding a caliper WITHOUT the pads in the caliper?
That doesn't make any sense.