However, Shimano say the new parts – which will be available from June 2010 – won't be compatible with their nine-speed mountain bike components or 10-speed road components. Deore XT Dyna-Sys ...

That monster 40 tooth cog has such a large diameter that the chain will not touch the spokes. Due to the angle the spokes take from the hub to the rim, the spokes are far enough away from the cog that ...