At the moment Mike I'm running my older 501X with small stuff - but in the red 501X I have 18t pulleys, 369 belts and 37t rear / 36tfront. I run a one way so it's the 36 one way pulley.
I don't think I've ever driven the DB01 with an over drive - but I could be wrong. I might have switched over at the Euros this year but I can't remember. The DB01 has the weight a little further back so maybe that makes the rear a little more planted on the loose? not sure.
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