10-Speed Ultegra Chainring question
I have an Ultegra 5-bolt Triple Crank with a 10 speed cassette, and would like to replace the small 30T chainring with something in the neighborhood of a 26T ring.
Anybody have any experience with this that could recommend a vendor for the chainring? |
You need one with a 92mm BCD. I'm not sure anyone makes one...
What's your cassette range? |
Only one generation of Dura Ace used the 92mm BCD inner ring, which was only available in 30T. More likely the OP needs a 74mm BCD, such as: http://sheldonbrown.com/harris/chainrings/74.html#26
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Didn't realize the 6703 Ultegra also used the odd-ball BCD. However, the 6603 model used 74mm and the 6600-series of Ultegra components were also 10-speed. OP: can you clear up which you have?
[Edit. Got rid of my options because davidad's is much better.] |
26 lol
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If you have the ****mano 6703 with the 92mm small ring you will have to get a TA adapter middle ring that will allow you to use 74mm BCD rings. May as well go with a 24t just in case you ever need it.
The 6603 uses a conventional 74 BCD ring. |
I have the Ultegra 6603. Does that mean a 74mm BCD/26teeth specified for 9-Speed will work for me?
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Originally Posted by LUCAS
(Post 10060393)
I have the Ultegra 6603. Does that mean a 74mm BCD/26teeth specified for 9-Speed will work for me?
|
Originally Posted by LUCAS
(Post 10060393)
I have the Ultegra 6603. Does that mean a 74mm BCD/26teeth specified for 9-Speed will work for me?
I would recommend adding a "chain watcher" to assure the chain won't spill to the inside on an emergency shift under load. Shifts to the granny ring are often done in a real hurry after you realize the hill is a LOT steeper than you thought. :) |
The 24t and larger will work.
The shift up to the middle ring won't be as smooth, but it is still easily done. |
Originally Posted by LUCAS
(Post 10060393)
I have the Ultegra 6603. Does that mean a 74mm BCD/26teeth specified for 9-Speed will work for me?
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