You criticised Shimano for straying from standard BCDs. Sram are equally guilty but escape the same criticism.

Re chain retention, we haven’t yet seen what Shimano offer – the pics seen are prototypes. We’ll soon see though eh?

sillyoldman – Member

You criticised Shimano for straying from standard BCDs. Sram are equally guilty but escape the same criticism.

Wrong on both counts tbh… SRAM use nonstandard chainrings but they don’t do it just on single models like Shimano keep doing with XTR, they have greater compatability. And yes they do get criticised for it. And also slated for their terrible BBs.

Having said that, SRAM’s replacable spiders make it less of an issue, and at least some of their nonstandard rings have a point to them whereas this doesn’t seem to.

It’s intended to better support the ring where it’s required. Like Ultegra and Dura Ace. I”d imagine it’ll trickle down the line when XT etc go 11 speed.

Re BCDs – isn’t XX1’s unique?

I totally agree that the 950, 960 unique BCDs are/were a pain in the hoop though!

Re BCDs – isn’t XX1’s unique?

Yep, 76mm. Removable spider though.

At least they’re still continuing with 10speed XTR?