Chainrings DA 7800 - different types?
04-25-09, 03:11 AM
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Chainrings DA 7800 - different types?
I have a "standard" (130mm PCD?) Dura Ace 7800 crankset that has worn chain rings and will need replacing soon. I looked at PBK and Wiggle and there appears to be an "A", "B" and "E" type - how do I know which one I need? Bike is a Cervelo with 10 speed rear cassette if it makes any difference.
They seem quite expensive for what they are, the larger outer chainring is nearly AUS$200 and the inner is nearly AUS$100. A complete new DA 7800 crankset is nearly $600 or I could get complete Ultegra crankset for a touch over $300!
They seem quite expensive for what they are, the larger outer chainring is nearly AUS$200 and the inner is nearly AUS$100. A complete new DA 7800 crankset is nearly $600 or I could get complete Ultegra crankset for a touch over $300!
04-25-09, 05:08 AM
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Replacement rings can be expensive compared to the overall price of the crank. The retail price is up to $140 for 7800 big rings in the US.
A & B are just meant to match up with an A or B little ring. If you are replacing the same size, you will end up with the right one. What you have is stamped on the edge. It will say SG-X 53T B or some such thing one hop over from the Shimano logo on the ring.
Rings can be found on the internet for less than retail sometimes. What size do you need?
A & B are just meant to match up with an A or B little ring. If you are replacing the same size, you will end up with the right one. What you have is stamped on the edge. It will say SG-X 53T B or some such thing one hop over from the Shimano logo on the ring.
Rings can be found on the internet for less than retail sometimes. What size do you need?
