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Old 06-03-20 | 02:45 PM
  #23  
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70sSanO
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Joined: Feb 2015
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From: Mission Viejo

Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970

Originally Posted by xroadcharlie
Bingo!

I love the simplicity of a single chain ring too. But when I looked for a new entry level bike in 2018, The one I liked used a Shimano 14 - 34 Megarange cassette. While I give them credit for keeping 6 of the 7 speeds well spaced and providing and adequate range (35 - 85 gear inches), That jump from 24 to 34T is WAY too much to be very practical with any single chainring. And if you spread them out, There're all to widely spaced.

The bike I choose has the same cassette, But thanks to a 28 - 38 - 48 triple chainring, I now have 12 closely spaced gears that cover every scenario I encounter. With a little patience and sometimes a small adjustment, I find the shifting to be reasonably smooth and reliable. Even with the low end Suntour crankset and Shimano Altus front derailleur.

Besides 90% of the time I can leave it on the 38T chainring if I choose. But sometimes it's advantageous to make a single shift of a chainring for a 2 - 3 step gear change.
FYI...

Sunrace makes a 12-34 8 speed cassette. I'm running it as a 14-34 7 speed (14-16-18-24-28-34) with a 30-38-48 (missed it by 2 teeth). Just break it open and use your 7 speed spacers or use with 8 speed spacing. I do have an added benefit of being able to thread on the 14t since my freehub body is UG/HG.

John
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