I am very happy to post this message: I completed one year of commuting to office in Mumbai. I cycle regularly from TIFR Colaba to Homi Bhabha Centre for Science Education near Anushakti Nagar Bus depot. The round trip is about 52km. On an average I take about 1hr 15min for each trip. My best timing so far was 1hr 5min. I did this in all seasons.
I ride Trek 7100 (hybrid). So far I had two punctures on the rear wheel. Considering that I covered so many miles, this I think is very good. The cycle gave no problems at all. Only thing that I replaced so far are the break rubbers.
Another thing I must mention, is that after I started cycling, inspiration from Shekhar and VK, five more colleagues from my office have purchased cycles.
Hope more people who use cars and motor cycles in the city for commuting will join us.