New Truvativ X Guide shift guide mounts to ISCG 05 or ISCG03. The difference between this and similar pieces from others is the dual pulley setup behind the chainrings. The pulley wheels are a bit smaller than derailleur pulleys, and somehow the chain just jumps between them.
I asked SRAM’s PR manager Morgan Meredith why two pulleys instead of just one that slides side to side and he said “This way has less noise and less wear and tear and eliminates the possibility of derailment when back pedaling because the pulleys are basically pointed directly at the chainring.”
I tooled around the expo on it and it is indeed pretty quiet. MSRP is $TBD and it should be available from August.
The shift guide was mounted up behind their new “all mountain” 2×10 chainrings with 22/36 gearing. They also offer 24/38, which is aimed at the 29er crowd, and they’re available for X0 and X9 as a complete crankset or an upgrade by swapping out the spider and rings on your current crankset. They get a special front derailleur with shorter cage, too, in X0 or X7 trim available in all the popular mounting options.
UPDATE: It’ll also available in a BB mount.
Detail pics after the break…