Doval 34T fixed OCP 16% oval

After using the 30T oval on my 29er hardtail, I was convinced of the benefits that the oval chain ring brings to mountain biking: easier to rotate the cranks (no stalling) and the added traction from the lack of pulsating power on climbs. On other situations I didn’t even take notice that I was riding oval chain ring, that’s how natural it is to pedal!

So I naturally wanted an oval chain ring to my newly acquired 26 inch Specialized Enduro Comp (2011).

Specialized Enduro Comp 2011 in garage

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Doval 30T MTB3032 14% oval

After monitoring my current 2×10 (32-24 : 11-34) gear usage and comparing different oval chainrings I came to a conclusion, that Doval 30T 3032OCP would be good for my usage, but also ordered 32T 104bcd version.

  • only oval that is available for 104bcd in 30T size with the 3032 mounting system and 99.5bcd

    Doval 99.5mm bcd (image from DOVAL )
    Doval 99.5mm bcd (image from DOVAL )
  • “double oval” i.e. rapid transition to minor axis after power stroke on major axis (see mtbr forum for more pictures and details)
  • cheap and easily available from ebay

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