Dura-Ace R9200

[OtterSpace]

What is this part?

It is for routing the Di2 cable at the back of the RD.

rd.jpg (60.81 KiB) Viewed 1307 times

[Lelandjt]

Thanks. Never seen that before. Weird thing, my front derailleur didn't include the cable guide so I was looking at this piece to see if it attached to the front derailleur. Ordering one off Amazon.

[warickwrx]

What is this part? I think it came out of the front derailleur box, but maybe rear derailleur.
20240328_202435.jpg

It is used to secure the di2 cable to inside of the rear derailleur mount, I have found that is does not work to well.

[LOWIEV]

Question about Ultegra cassettes. This may have been covered allready, but couldn't find it...

Whats the difference between the ULTEGRA CS-R8101 CASSETTE & ULTEGRA CS-R8100 CASSETTE?

Is it the updated version of the cassette whitout the clicking noise? Or is it something different?

Thanks!

[pdlpsher1]

No. 8101 is compatible with Di2 and mechanical shifting. 8100 is Di2 only.


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[Lelandjt]

No. 8101 is compatible with Di2 and mechanical shifting. 8100 is Di2 only.

Weird. I'd love to know the details but googling turned up nothing. Were both released at the same time?

[208]

Thanks. Never seen that before. Weird thing, my front derailleur didn't include the cable guide so I was looking at this piece to see if it attached to the front derailleur. Ordering one off Amazon.

The fd should come with a 90degree plug routing thingy. I still cable tie mine to the frame just to keep everything tight, though.

[harblhat]

No. 8101 is compatible with Di2 and mechanical shifting. 8100 is Di2 only.

Weird. I'd love to know the details but googling turned up nothing. Were both released at the same time?

8100 was released first with Di2, 8101 came later once the mechanical 12 groups came along. 8101 has different tooth profiling meant to better accommodate mechanical shifting, whatever that means. 8100 will work with mechanical (I do it) but it's apparently not 100%.

[Lelandjt]

The fd should come with a 90degree plug routing thingy. I still cable tie mine to the frame just to keep everything tight, though.

Yeah, this was straight from Shimano via their employee purchase program. That one part was missing. The cable is okay now but I'd rather have it routed a little tighter via the guide. I ordered one from Amazon for $8.

[BdaGhisallo]

No. 8101 is compatible with Di2 and mechanical shifting. 8100 is Di2 only.

Weird. I'd love to know the details but googling turned up nothing. Were both released at the same time?

8100 was released first with Di2, 8101 came later once the mechanical 12 groups came along. 8101 has different tooth profiling meant to better accommodate mechanical shifting, whatever that means. 8100 will work with mechanical (I do it) but it's apparently not 100%.

I would have thought that DI2 would impose more demanding shifts on a cassette than mechanical typically would.

[Hexsense]

I would have thought that DI2 would impose more demanding shifts on a cassette than mechanical typically would.

And it is more precise at doing overshift and back off.
Say you only need 1.8mm (make up number) of cage movement to sit in the middle of next cog. The Di2 RD may move 2.1mm initially to help speed up the shifting then back off to the rest location. Cable actuated gears 's overshift action is at the mercy of the rider for the down shift (to an easier gear) and simply not doable for the up shift (to the harder gear).

So, a cassette for mech gear must allow the gear indexing to be less precise and don't rely much on overshift to crisp-ly change gear.

[robbosmans]

How do these shift with shimano 12s?

[GONE4ARIDE]

How do these shift with shimano 12s?

I am also curious to see feedback re: 12 speed.

I am using the Buzz chainrings with Shimano DA Di2 11s and the shifting performance is outstanding.

[foobaar]

How do these shift with shimano 12s?

I use them with Ultegra 12 di2 - it works, even with 52/34 on my bike (images for this combo viewtopic.php?f=4&t=161754&p=1823639#p1823639)

[robbosmans]

Nice thanks, i know they will never shift as good as shimano’s but if its at least 80% as good i can live with that

(Thats a lovely crux build!)