Join Date: Aug 2008
Location: Tucson, Arizona
Bikes: '02 Lemond Buenos Aires, '98 Fuji Touring w/ Shimano Nexus premium, '06 Jamis Nova 853 cross frame set up as commuter, '03 Fuji Roubaix Pro 853 back up training bike
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Rings on DA 7410 crank
I picked up a 7410 crank set at a swap meet. I'm not sure if they have the original rings. The big ring is labeled "Shimano SG" and "B-53", all marked on the outer side of the ring and with a grove running around the circumference of the ring beneath the teeth. The inner ring is mounted with no markings on the outer side. On the inner side it is marked "Shimano SG", "TL", "B-39", and a "V" mark positioned right at the crank arm (3rd pic). The inner ring has a "shelf" on both sides running around the perimeter of the ring below the teeth (2nd pic). As mounted, the shelf on the on the inside is about 1/2 mm higher than the shelf on the outside. Is this the correct orientation? Are these original DA 7410 rings? IMO, the condition of these rings is excellent, but I'd appreciate a second opinion. Thanks.
Edit-After removing the rings, I see the ring nut groove on the inside of the bolt holes of the small ring, so it was correct.
Last edited by vredstein; 04-16-14 at 10:14 PM.