Rizal Philippines
5.25.2021
This post is testing his 29er two by set up:(34 and 24 front chain rings 11 -42 rear cogs combination) first with a long ride to MM,, and second, hard climb to Antenna hill. Anxious about chain falling off, and shifting malfunction. Fortunately there was none; the set up was DIY and has not been inspected tested by a bike mechanic. How would the bike hold out vs conventional set up.
1. On the flat. - I was even ahead of the group at 34 x 10. If you compute: 34//10 = 3.4 x 29 inches = 98.6 gear inches nearly near to a 53/12 x 27 = 119. Of course there is still a 19 gear inches difference. However, this is tough on the calf muscles.
Now this is the reason why MTBs overtake even RBs on the ride..
I computed with an Engineer these gear ratios.
If you have a 38 chain ring in front and you have 10 smallest gear at the back (SRAM has 9), you have 38/10 = 3.8 x 29 = 110. Then you are at par with a RB with 53t front chain ring
2. Going up - I tried the set up at Antenna hills where the climbs are stiff and steep. I stayed at 34 (the primary gear of the two by) and used mostly 34 x 34, and 34 x 36. I did not have to shift at 42 I did not shift to the 24 (No 1) gear.
I am happy with the bike performance. Going two by was just keeping up with the trend, and experiencing what other MTB riders are experiencing,
