City cyclists have a lot to worry about—jaywalkers, cabs, bus fumes—so it’s a blessing that they can take care of all their bicycle needs, at least, in one stress-free stop. The Toga Bike Shop (110 West End Avenue, at 64th Street; 212-799-9625) stocks a full range of accessories, from helmets to heart-rate monitors, under its canopy of Cannondale, Specialized, and Giant bikes. The savvy staff will know precisely why your seat is uncomfortable and have it fixed before you’re even done complaining. Lifetime service comes free with any bike purchase, but walk-ins can get tune-ups at the best rates in town. Rentals, too, at $30 for 24 hours.