As summer approaches, it’s time to switch gears. Sitting in the subway just starts to seem lazy, and those ever-controversial bike lanes look more appealing. Plus we all want to be fit for the beach and riding a bike is a sure way to do it. But is your bike ready? It’s been a long winter, and whether you braved the cold or left it locked to a pole, you bike definitely needs some adjustments. Not to fear: This Sunday, bring your bike to The Diamond (you did have plans to do some drinking this weekend, right?) because Silk Road Cycles is holding a free bike tuneup in the backyard. Complete with tools, bike stands, a parts-washing station and the owner of Silk Road Cycles to help you himself, you’re sure to be ready to get back to two-wheeling it all over town.