Lower Road Bike Gearing, Sugino OX801D, & De Rosa Nuovo Classico
02-20-13, 10:18 AM
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Lower Road Bike Gearing, Sugino OX801D, & De Rosa Nuovo Classico
I started this thread to provide some information about a couple of options for securing lower than usual road bike gearing with a double crankset. If anyone has an effective way to do this other than the ones I list, please feel free to comment and give details.
In regard to my option choices for lower gearing, I recently completed a bike using a Sugino OX801D crankset (see photo below). In that build, a 46/30T Sugino Compact Plus+ OX801D crankset (https://www.suginoltd.co.jp/english/o...in_english.htm) was mounted on a De Rosa Nuovo Classico frame along with a Shimano FD-CX70 cyclocross front derailleur. (Source for the crankset - https://www.alexscycle.com/cranks/roa...nwheelset.html) According to the Shimano web site (https://bike.shimano.com/publish/cont...-.fd_road.html), the FD-CX70 is designed for use with top gear chain rings of 46-52 teeth and has a maximum capacity of 16 teeth. So, it works fine with the Sugino 46/30T crankset. The FD-CX70 is also fully compatible with current Shimano ST-6700/ST-5700/ST-4600 10-speed road shifters as is the Sugino Compact Plus+ OX801D crankset. That means that the combination of the Sugino Compact Plus+ OX801D crankset and the Shimano FD-CX70 front derailleur works well with Ultegra 6700 shifters and the Ultegra RD-6700-A-SS rear derailleur and a 12-30T Shimano cassette. The combination of a 46/30T crankset and a 12-30T cassette gave a reasonable top gear of 100.7 gear inches and a low gear of 26.3 gear inches. That gearing is great for general riding up and down hills by average riders.
An 11-28T Shimano cassette could have been substituted in the above build, which would have given a top gear of 109.9 gear inches and a low gear of 28.2 gear inches. For comparison purposes, a standard compact 50/34T Shimano crankset with a 12-30T cassette would have given a top gear of 109.5 and a low gear of 29.8 gear inches.
Finally, it should be noted that there is a less expensive version of the Sugino crankset available from SOMA called the Sugino OX601, which has a less polished finish but the same wide assortment of chainring possibilities (https://somafab.blogspot.com/2012/12/...01-cranks.html).
In regard to my option choices for lower gearing, I recently completed a bike using a Sugino OX801D crankset (see photo below). In that build, a 46/30T Sugino Compact Plus+ OX801D crankset (https://www.suginoltd.co.jp/english/o...in_english.htm) was mounted on a De Rosa Nuovo Classico frame along with a Shimano FD-CX70 cyclocross front derailleur. (Source for the crankset - https://www.alexscycle.com/cranks/roa...nwheelset.html) According to the Shimano web site (https://bike.shimano.com/publish/cont...-.fd_road.html), the FD-CX70 is designed for use with top gear chain rings of 46-52 teeth and has a maximum capacity of 16 teeth. So, it works fine with the Sugino 46/30T crankset. The FD-CX70 is also fully compatible with current Shimano ST-6700/ST-5700/ST-4600 10-speed road shifters as is the Sugino Compact Plus+ OX801D crankset. That means that the combination of the Sugino Compact Plus+ OX801D crankset and the Shimano FD-CX70 front derailleur works well with Ultegra 6700 shifters and the Ultegra RD-6700-A-SS rear derailleur and a 12-30T Shimano cassette. The combination of a 46/30T crankset and a 12-30T cassette gave a reasonable top gear of 100.7 gear inches and a low gear of 26.3 gear inches. That gearing is great for general riding up and down hills by average riders.
An 11-28T Shimano cassette could have been substituted in the above build, which would have given a top gear of 109.9 gear inches and a low gear of 28.2 gear inches. For comparison purposes, a standard compact 50/34T Shimano crankset with a 12-30T cassette would have given a top gear of 109.5 and a low gear of 29.8 gear inches.
Finally, it should be noted that there is a less expensive version of the Sugino crankset available from SOMA called the Sugino OX601, which has a less polished finish but the same wide assortment of chainring possibilities (https://somafab.blogspot.com/2012/12/...01-cranks.html).
02-20-13, 10:38 AM
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I love that crankset. Looks absolutely great on a vintage frame.
