Just a head's up that most sizes of Shimano's R700 compact crankset are now available, but the separate compact chain rings are not. My guess is that we'll see these by spring at the latest. My opinion is that a compact crankset is going to give you better shifting performance than a triple. Now that Shimano's in the mix, now you can replace those FSA, TruVativ, etc., rings with the Shimano R700 rings and ultimately get better shifting performance while still being able to use your standard Shimano front derailleur. You'll be happier that you did.
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January 31, 2006
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Hello Will,
The tooth difference between the rings isn't really an issue as long as the outside ring have a good pin/ramp design. The negative factors of a triple include but are not limited to the need to use a long cage rear derailleur, longer chain, greater chain cross-over angle, and the dreaded downshift into the inner/granny ring... Shimano acknowledged this issues several years ago when they introduced the 34t rear cog....thus avoiding/delaying the need to drop down into the granny and risking the chance of droping the chain and experiencing chain suck. In this case, more parts complicates the issue and has an effect on shifting. I hope that this helps and thanks for writing.
Posted by: RogueMechanic | February 27, 2006 at 08:53 AM
could you explain why a compact crankset will give better shifting performance than a triple? it seems that, because of a greater tooth difference between rings, a compact shouldn't give better shifting performance than a triple.
Posted by: will law | February 25, 2006 at 03:56 AM
Thanks for your comment Arleigh. When it comes down to it, it's really hard to beat the shift performance of Shimano rings... It's amazing how many times over the years that I had to "warranty" rings mainly because of sub-standard quality and poor design...
Posted by: RogueMechanic | February 02, 2006 at 09:01 AM
I agree on the rings. There were many "warranty" Truvativ rings that came through the shop thanks to shifting issues.
Posted by: Arleigh | January 31, 2006 at 02:57 PM