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Sakae CX triple - lower gearing with Rivvy "Silver" chainrings?

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Sakae CX triple - lower gearing with Rivvy "Silver" chainrings?

Old 11-03-14, 04:05 PM
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Sakae CX triple - lower gearing with Rivvy "Silver" chainrings?

Hi Bikeforums community -- crankset question for you...

I have an older Sakae CX 110/74 triple crankset on which I want to lower the gearing, and I wonder if anyone has experience with Rivendell's "Silver" chainrings.

It's currently set up like so, which is original/factory:
52 (110mm)
46 (110mm)
36 (74mm)

And I'd like to go:
46 (110mm) -- unchanged, would become big ring
35 or 36 (110mm) -- likely need to replace middle ring for BCD and spacing, Rivvy sells the odd size
25 or 26 (74mm) -- new, also Rivvy

So, essentially, I think I would need to switch the current small ring from 74mm to 110mm to make it the middle ring. The 46T ring would go from inside the crankarm to the outside. Would this make sense?

Also -- separately -- has anyone had experience with the Rivvy brand rings?

Here is an example of what I have, even though the pictured crankset is geared differently:
Steel Vintage Bikes - Sakae CX 3-speed crankset

Thanks
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Old 11-03-14, 04:27 PM
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I never buy new rings, instead, I pick up a vintage mtb with a nice triple, and transplant the crankset. I have also used the two larger rings on a mtb crankset to make my own compact crank. Around here, deals on older mtbs are plentiful, just have to make sure it is a decent one and not one of those with riveted on chain rings. 26/36/46 was a common crank on vintage mtbs.
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Old 11-03-14, 05:29 PM
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^ Me too. I think I even have a Sakae CX set up 48 38 28 from an old MTB I took apart. Definitely going to put it to use some day, as my legs get older.

Also, if you just need a couple rings, you could advertise in our trades or for sale sections here. Never know what folks around here have surplus for cheap. The money you save can pay for your upgraded subscription here.
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Old 11-03-14, 07:36 PM
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If the 46 ring you have doesn't have any pins or ramping for shifting you should be okay to run it as an outer ring. Some rings sold these days are only for inner or outer positions because of the stuff they add to make shifting easier. Watch out for the inner bolts on those sakae cranks, they are different than most inner bolts so don't loose them or the spacers, they are really tough to track down. I had a bianchi randonneur that was missing an inner bolt and spacer, took me over 2 years to find a damaged crank at the co-op to pilfer the bolts.

The crank on my long distance bike also came from an old MTB, has 48/38/28... nice and light, specialized branded with aluminum rings.
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Old 11-03-14, 08:26 PM
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I built one mountain bike with 46-38-24, which provides a nice 1.5-step-plus-granny with a 2-tooth interval in back, something like 12-13-15-17-19-21-24-28.
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Old 11-04-14, 06:17 AM
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No personal experience with Rivendell brand rings, but have never purchased a bad part from them and wouldn't hesitate to buy their rings. The have tight ties with the Sugino people, wouldn't be surprised if they were made by the same supplier.

Have done exactly what you are doing a number of times gearing-wise, it works very well!
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Old 11-04-14, 09:38 AM
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You can get Sugino 74 bcd alloy chainrings at Universal Cycles for less than Rivendell sells them.
Universal Cycles -- Sugino 74/110mm Standard Rings
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