I contacted Bosch since the dealers I contacted didn't have a direct answer. Have any of you guys bumped into this or have experience in such a mod? Are the dealers supposed to be able to change the parameters? However, the Bosch drive seems to have parameters "minimum/maximum gear ratio" according to a diagnostics report (I don't have one of my own at the moment), and from what I understood from reading a german forum with Google Translate it seemed that some people have been getting annoying errors after messing with the gears, and they've attributed that to these gear ratio parameters. ![]() I know 15 (or 2.45*15)/42 should be plenty, but I still want more. I'd like to change the chainring to a 14t and once Shimano's new 11-46 is out put that in, or use something like OneUp's 45t sprocket. The bike now has a 15t chainring/sprocket and XT 11-42 in the rear. I'm looking into having easier unassisted climbing (that's just how I roll, I'm not interested in losing a tiny bit at the fast end nor do I care about tuning the drive to assist faster) with my Performance Line CX equipped bike.
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