spinner5339
03-25-04, 04:07 PM
I have an old BCD 110 shimano cranks, what is the biggest chainring that I can have for this before I go to the BCD 130? 52-53?
Bicycle Mechanics - Bcd 110
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John E
03-25-04, 07:05 PM
I have seen 52T rings for 110mm BCD. Keep watching eBay and SheldonBrown.com if you want them or perhaps something even bigger. Structurally, a 110mm BCD should be able to support up to perhaps a 56T ring without excessive flex, but 130 or 135mm would, of course, be preferable in this application.
cycletourist
03-25-04, 07:06 PM
You can buy 110 bcd chainrings up to about 56 or so. The smallest that will fit is a 34.
madpogue
03-26-04, 12:12 AM
I just saw an Ultegra 110/74 BCD crankset with a Dura-Ace 56-tooth big chainring on eBay. Woulda been a perfect way-big ring for my 'bent, but the bidding got a bit rich. Odd thing was, the "inside" diameter of the ring, between the bolts, was about the same as for a 52-ish ring, so there's a wide expanse of metal between the bolts and the outside of the ring. Big enough for the word "Dura-Ace" in huge letters. I woulda thought they'd design it more "flying buttress" style, to save weight.
khuon
03-26-04, 12:43 AM
I remember downhill mountain bikers running upwards of 60T on 110BCD cranks. I'm not sure if they were custom made though but I suspect they were off-the-shelf. Check out Vuelta (http://www.vueltausa.com/chainsizes.htm) for some large 110BCD rings.
Gonzo Bob
03-26-04, 06:45 AM
I have an old BCD 110 shimano cranks, what is the biggest chainring that I can have for this before I go to the BCD 130? 52-53?
www.loosescrews.com has a 60T for 110mm BCD
www.loosescrews.com has a 60T for 110mm BCD