I need some helps. I'm venturing into my first build, and I'm acutely aware that there's loads of shit that I don't know shit about. I'm new to all sorts of things, but I'll just pester you all with one thing for now. Specifically, I need your collective knowledge, advice, and patient explanations, regarding chainline:
I bought a pair of MTB wheels second hand recently for a pompetamine. By my crude guesswork, the wheels look like they have a chainline of 46.5mm. I got that number because the hub is 135mm. The sprocket is 21mm in from the outside of the hub, so the chainline is (135/2) - 21mm = 46.5mm. See bad photo:
angle of photo is a little off, as I didn't have a third hand available for photography, but I think the sprocket is 21mm from the end of the hub. Am I calculating this correctly?
The hub has a freehub and spacers, so I can shuffle the sprocket out a bit, but I think the chain would foul on the spokes if I brought it any further inward.
I heard vicious rumors that a shimano alfine chainset wasn't a bad place to start, but this says it has a chainline of 42.7mm.
4mm doesn't seem like a lot, but I'm guessing that this is beyond what is recommended?
What do people suggest? Getting the alfine (or similar) with a different BB with a wider spindle? (not sure what BB this Alfine comes with). Or do I get a different chainset and bottom bracket?
This isn't going to be a fancy build, so recommendations of fancy parts might be awkwardly ignored.
Thanks for the helps.