Campy 2x10 converted to 1x10 ?
07-22-16, 03:26 PM
#1
GranitCurbVia53x11Sprint
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Campy 2x10 converted to 1x10 ?
I have a CAMPY ULTRA TORQUE 34/50 crankset with a 12/25 cassette. shifts wonderfully. i do about 3 to 4,000 miles per year, getting ready to replace both the chain and cassette.
while i'm at it, i'd like to try converting it to a 1x10. the new Sram narrow wide chainrings come in 46t, when paired with an readily available 11x29 cassette i get almost the entire range, close enough on the lowest gears and actually a tad higher than the current high of 50/12. I know others have had problems with the UT crank but it has been absolutely wonderful creek free BB for me for many years, so i don't want to replace that.
my campy 5 arm crankset has the 5th bolt thru the backside of crank arm, needing a 113 BCD pattern there with 110 BCD on all other 4 bolts. this i think i can fix with either skipping the bolt altogether or some milling, not too worried about this aspect.
however, would there be chain line problems? I assume i'd mount the ring on the other side, but should i mount on the inner? other issues?
I did a similar 1x10 campy on my dean ti gravel, using a 42t campy inner ring and a bash guard to help prevent chain coming off and have had no issues, thou that bike is paired with A 12/25. any info greatly appreciated.
while i'm at it, i'd like to try converting it to a 1x10. the new Sram narrow wide chainrings come in 46t, when paired with an readily available 11x29 cassette i get almost the entire range, close enough on the lowest gears and actually a tad higher than the current high of 50/12. I know others have had problems with the UT crank but it has been absolutely wonderful creek free BB for me for many years, so i don't want to replace that.
my campy 5 arm crankset has the 5th bolt thru the backside of crank arm, needing a 113 BCD pattern there with 110 BCD on all other 4 bolts. this i think i can fix with either skipping the bolt altogether or some milling, not too worried about this aspect.
however, would there be chain line problems? I assume i'd mount the ring on the other side, but should i mount on the inner? other issues?
I did a similar 1x10 campy on my dean ti gravel, using a 42t campy inner ring and a bash guard to help prevent chain coming off and have had no issues, thou that bike is paired with A 12/25. any info greatly appreciated.
07-22-16, 05:12 PM
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I would strongly suggest that you do not omit any of the bolts.
07-22-16, 08:23 PM
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GranitCurbVia53x11Sprint
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ok, thanks, any idea if i'd have chain line problems?
07-23-16, 06:56 AM
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You probably would not have significant CL issues but it may need to be tweaked a bit to get it perfect.
07-23-16, 07:51 AM
#5
GranitCurbVia53x11Sprint
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what tweaking? i imagine i only have 2 options, mount the ring on the inner or outer.
07-23-16, 02:46 PM
#7
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Chainline is optimized to have it fall Between the 2 chainrings of a double .
the chain will have to flex sideways more to get to the small end of the cassette.
Middle of a Triple, because it sits centered, is a better chainline for a 1 by.
any thing but a Campag chainring and you have to Ovalize the chainring Bolt hole
Obviously to fit the displaced to 113 bolt's hole in the crank.
the chain will have to flex sideways more to get to the small end of the cassette.
Middle of a Triple, because it sits centered, is a better chainline for a 1 by.
any thing but a Campag chainring and you have to Ovalize the chainring Bolt hole
Obviously to fit the displaced to 113 bolt's hole in the crank.
Last edited by fietsbob; 07-23-16 at 02:54 PM.
07-23-16, 06:10 PM
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Thank you.
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