Where to buy lower tooth rear sprockets?

[isaac]

The 16 made me have to adjust the wheel forward. The 38 will make me adjust it backward again. I'm thinking it comes out in a wash. But if we're dealing with worst case scenarios, I'll deal with the 10 minutes it takes me to add a link to the chain.

As for rideability and the 7.3% reduction in mechanical advantage (rectified with the downward press of the shifter), considering I've already experienced the purportedly devastating ~7% drop in mechanical advantage with the 16 tooth front sprocket for a few hundred miles now with no ill effects, I think I'm prepared for that. I'm not too worried about the possibility of having to swap back. It's not like I'm experimenting with compression ratios. Ten miles worth of new rear sprocket is a 20 minute easily resellable mistake I'm willing to make.

I appreciate the sprocket specialists and bike bandit sale suggestions. I'll look into it. If I go ahead and do this, I'll be sure to report back about whether the bike can still cruise well at 60-70. This engine sounds like it's murdering itself above that speed anyway. Considering how very rarely I'm on the freeway, even if it loses a few mph I'm not sweating it. On my 30-minute ride to my brother's house (the longest I go with any regularity) the fastest road is a 50mph stretch of two lane for about two miles.