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Shimano Ultegra FC6603 Chainring

Item #: CG407A19
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Shimano Ultegra FC6603 Chainring

Shimano Ultegra 10 speed Chainring for Shimano 6603 triple cranksets.
  • 6603 Triple 10 speed 74 / 130mm
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Can these be used for Shimano 9 spd. triple crank (Ultegra or 105) ?
tom p on Dec 16, 2016
BEST ANSWER: I have one of these in the original package: FC-6603 Chainring 39T S (52-39-30T).
The one I have is intended as a 39 tooth middle chainring for a triple crankset. It has 5 bolts as pictured.

The packaging is set up for several chainrings and has checkboxes marked as follows:
- 3x (not 2x) number of chainrings
- 10s (not 8s, 9s, 11s, or 8s/7s) speed
- 130 mm (not 96, 104, or 110mm) size of bolt circle
- 39T number teeth
- Ultegra

As far as I know, Ultegra and 105 chainrings are completely compatible. I've used this part on a 105 crankset. So that's not a problem.

This chainring is marked for a 10 speed drive train. I don't know if you'd have issues using it for 9 speed.

Best,

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Get free shipping with your $50 purchase today when you choose Standard Shipping at checkout. Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items

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Free Shipping Offer

Get free Standard Shipping with your $50 purchase today! Just choose Standard Shipping during checkout.

Please note this offer is only available to physical shipping addresses in the 48 continental United States (no PO Boxes), and oversize charges still apply on some heavy/large items.