Is the "medium" cage the ss or the gs version? shimano literature does not use the terms "short" or "medium" in their descriptions of the rd 8000.

medium is GS, short is SS for Shimano RD-8000 derailleurs. They cover 11-28T to 11-34T and 11-25T to 11-28T, respectively. See https://bike.shimano.com/en-EU/product/component/ultegra-r8000.html

is this for 10 speed ?

Actually, this will work with 10sp Tiagra. If you have ST-4700 levers (not sure about the MTB (flat bar) shifter version), then the pull ratio will work for and as 10sp on your 10sp cassette and shifter. You'll be future-proofed when you decide to switch out the lever, chain and cassette for actual 11sp. I am running ST-4700, RD-R8000GS, CS-MT771-10, CN-6701 (10sp) chain and everything works flawlessly.

El de tamaño M es el conocido como patilla larga ?

Sí, es lo mismo que pata larga.

What length of chain do I need with a medium cage?

Hi, we sell standard length: 116 link & you buy it & you have to cut yourself. if you need chain, we have it at my amazon store cycle4less asin #B00KQK5RAW. Bob

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SHIMANO Ultegra Rd-R8000 Rear Derailleur

Product ID: 283368060

Details

Brand
SHIMANO
Colour
black
Material
Aluminum
Mounting type
Clamp-On Mount
Product dimensions
22.9L x 11.4W

📏Supports 11-30T cassette range

⚙️11-speed precision shifting

🛡️Shadow RD low-profile design

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Shift like a pro, ride like you own the road.

SHADOW RD TECHNOLOGY - Low-profile design protects your derailleur from damage while maintaining consistent performance.
DIRECT MOUNT STIFFNESS - Enhanced frame connection reduces flex for sharper, more reliable gear changes.
LIGHTWEIGHT ALUMINUM BUILD - Durable yet featherlight at just 198g, engineered for the serious road cyclist.
SEAMLESS 11 SPEED SHIFTING - Experience ultra-smooth gear transitions that keep you ahead in every race or ride.
WIDE CASSETTE COMPATIBILITY - Supports cassettes up to 11-30T, perfect for conquering varied terrain with ease.

The Shimano Ultegra RD-R8000 Rear Derailleur is a high-performance 11-speed road cycling component featuring Shadow RD low-profile technology for enhanced protection and consistent shifting. Its direct mount design improves stiffness and gear precision, while compatibility with 11-30T cassettes offers versatility for diverse riding conditions. Crafted from lightweight aluminum, it balances durability with minimal weight, making it a top choice for competitive and passionate cyclists.

Specifications

ASIN	B072MKT5NR
Best Sellers Rank	#63,249 in Sporting Goods ( See Top 100 in Sporting Goods ) #30 in Bike Rear Dérailleurs
Brand Name	SHIMANO
Case Material Type	Other
Color	black
Customer Reviews	4.7 4.7 out of 5 stars (729)
Global Trade Identification Number	00689228623156, 04524667623151
Included Components	1 x Shimano Ultegra RD-R8000-SS 11 Speed Rear Derailleur, Black
Item Dimensions L x W x H	22.9L x 11.4W x 10.2H centimeters
Item Type Name	Rear Derailleur
Manufacturer	Shimano Inc.
Manufacturer Part Number	IRDR8000SS
Material Type	Aluminum
Model Number	C8C055
Mount Type	Clamp-On Mount
Number of Teeth	11
UPC	689228623156
Unit Count	1 Count
Warranty Description	No Warranty

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