I believe Raja Cycle Mart near the jn. of Airport Road and Marathahalli stocks it (if coming from Indiranagar on Old Airport Road, it's just before the Marathahalli junction to the left, on the first floor).
/prasad
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“Ten thousand flowers in the spring, the moon in autumn,
a cool breeze in summer, snow in winter.
If your mind isn’t clouded by unnecessary things, this is the best season of your life.”
~Wu Men Kuan