Really!? Doesn't sound like 12sp XTR is good value if only aluminium. For a weight penalty of ~45g the durability of XT steel teeth must surely win out. Not to mention that XT is half the price.According to the Shimano spec sheet, 12-sp. XTR rings are aluminium. Pretty boring really. XT are a mix of aluminium, carbon and steel. 11-sp. XTR used various combinations of aluminium, carbon fibre, stainless steel and titanium, which differed between 1x, 2x & 3x rings.
Road bike swaps around 250-280, mountain bike around 180-200.For those that rotate two or more chains on their drivetrain, how often do you swap them - assuming it would be quite regularly?