Shimano XT M570 chainset - bargain or not?

365punter
365punter Posts: 39
edited February 2008 in MTB buying advice
Chain reaction cycles are doing Shimano XT M570 chainsets for £39.99 (they say reduced from about £119.99 i think). Is this an excellent bargain for someone who needs to replace (and upgrade) their drivetrain? Is it way old technology (no mention of these on shimano's site)? Should I stick with getting new Deore stuff for similar money (I've found whole Deore groupsets online for £150 inc hydros)?

On another note, when I get a new chainset, how do I know what length BB axle to get? I'm assuming that different chainsets need different length axles.

The bike's a 2007 Mongoose Tyax Elite btw.

Thanks for any help!

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