Issue is, to really get the most out of a class like that, 10 is probably 3-4 people too many. So then instead of $500 your only looking at $300 value, and then it goes from there. ETA: There are tons of bike shops that do spring bike maintenance classes each year, and I'd wager most are free (or you buy the CO2/tire). But more detailed stuff, I would say is very little economic value in giving detailed classes on cassette changing, overhauling the bike, cable re-routing.

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@brooksdoughtie
USAT-L2,Y&J; USAC-L2
http://www.aomultisport.com