according to SC's setup guide (http://www.santacruzbicycles.com/nomad/#setup.php) you should run either a 400lb or 450lb spring. however in order to achieve proper sag of 20-30% I had to run a spring that was 100lb lighter than what was recommended. i'm also 175lb with full gear and i use a 350lb spring.
you'll find a number of riders who found the recommended spring weight to be way too firm. most dropped at least 50lb.
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