[Closed] Swapping out Avid Elixir brakes for Shimano SLX

Hi there,

I hope you all can help (first time asking a question by the way).

I have a Specialized Epic Evo and I have recently taken off the Avid Elixir brakes that originally came with the bike to replace them with a new set of Shimano SLX brakes. Foolish me - I thought it would be straightforward - can of worms as usual!!! Using the existing bolts and spacers the SLX callipers sit way too high over the rotor. I realise I probably need smaller spacers but how do I work out what size I need and where do I get some from?

Any advice would be greatly appreciated.

Thanks.

Mike