144 BCD Chain Rings
 

Does anyone make or sell chain rings in the Campagnolo Nuovo Record size and style? All I am finding is "track" chain rings in this size, which use a 1/8" chain, as opposed to 3/32" for the Campagnolo.

Specialites T.A.
Likely order from England. They are very pretty.
https://www.spacycles.co.uk/m8b0s113.../Chainrings-TA

Campy 144 BCD Chain Rings
 

What size are you looking for? NR or SR?

Bad Lag The reason I asked was if you are looking for new, or.... I have a bunch of 144 BCD Campy NR & SR, Sugino, SR, Suntour and maybe even a TA ring.

The later TA chain rings are made of 7075 aluminum rather that the common 6061 - at least some of them are. Very high quality.

verktyg :50:

If you want with Colnago or Masi big ring pantographing - cyclomondo out of Oz has some nice ones.

The T.A. rings are the only ones that I know of... but it's been a long time since I've shopped for them.
Peter White Cycles is a distributor here in the USA.. https://www.peterwhitecycles.com/tach.php#competition
Looks like a 42T inner ring is $58 and a 52T outer ring is $69.

I've bought stuff from Peter since the first Schmidt hub dynamos came out around the year 2000, and just bought a nice 34T, 110mm BCD T.A. ring about a month ago. The T.A. rings are excellent quality.

Steve in Peoria

I bought a narrow-wide 44t 144bcd on Aliexpress, have yet to use it but it looks and feels solid and I will be putting it on since I usually drop my chain every few rides over train tracks or something and I feel like I am getting strong enough to graduate from the 42t i've been using

Old Gipiemme chainrings fit Campagnolo cranks.

https://cimg1.ibsrv.net/gimg/bikefor...f4535fbb8e.jpg
https://cimg2.ibsrv.net/gimg/bikefor...d680c623a1.jpg

don’t know the term narrow-wide.
Seems you might be running a fixed or single speed, which either a 3/32” or 1/8” chain could be used.
never lost a chain on a fixed on the road.
there are some brands that tout extended height teeth to help keep the chain engaged.

Back in the day, Sugino, SR were other brands that made to the 144 BCD form factor.

Thanks, everyone. The TA chain rings will have to do. I like that they are made from 7075 alloy.

I've always thought rings should be steel for longevity. 7075 has the tensile strength of mild steel, so that is encouraging. I am not sure about the hardness because hardness makes machining more difficult but post-machining tempering can be used to harden the alloy of the final product.

Anyone know about these rings?

Kind of a long shot, but I have a Cannondale-branded 46T chainring in 144mm BCD, 3/32", black color. I bought it at a swap meet thinking I might use it for my fixed-gear, but I doubt I will.

LMK if interested.

i doubt heat treated, the probability of warping during the heat treatment would outweigh the hardness benefits. Think about the scrap rate.

I was looking at Campagnolo 42t 144bcd chainrings for a future project and desided that for the money, I might as well pick up a 42t triplizer when the time comes. Im planning on running a triple, but theres no reason not to run a triplizer ring as a double with options.

Machinability Rating
 

HUH!

This chart show the machinability rating of some common metals.

"Free Machining" low carbon steels like SAE/AISI 1112 and 1212 have a machinability rating of 100% as the basis. The figures are for steel in the annealed (soft) condition.

The machinability rating for cold drawn aluminum alloys is 360% - 3.6 times easier to machine than 1112 and 1212 steel. Most steels used in bicycle tubing will be in the range of 4130 steel.

https://cimg7.ibsrv.net/gimg/bikefor...4c1e4f8b3b.jpg
To answer your question about steel chainrings, there are a number of reasons aside from the weight factor why they're only found on the cheapest bikes today:

Aluminum chain rings date back to the early 1930's. A major consideration is that aluminum chainrings absorb a lot of drive train vibrations and provide for smoother pedaling. That's a BIG factor for longer distance cycling.

Chainrings like chains and rear sprockets are considered wear parts never intended to last forever. In almost 50 years of riding derailleur bikes, I found that it takes a lot of miles to wear out aluminum chainrings.

With periodic cleaning and lubrication of the drive train, 10,000+ miles is not an unreasonable expectation for aluminum chainring life. You'll go through 3-4 chains and freewheels/cassettes to one chain ring!

Think about this... How many bikes actually get ridden 10,000 miles? Places where bikes are a common means of transportation like China and parts of Europe, also in the US a few commuters and serious sporting cyclists (like many folks here on BFs) can put 10,000 miles on a bike in a reasonable time span.

When an aluminum chainring wears out replace it just like tires, brake pads, chains, etc.

https://www.renehersecycles.com/hist...uminum-cranks/

Solution for worn chainrings. :roflmao2:

https://cimg6.ibsrv.net/gimg/bikefor...9708d7bb85.jpg

verktyg :50:

I have one on my 82 Super Record equipped Medici. IMO, better than original and I never get any sh_t for it. The original SR lasted so long that it could not be replaced reasonably with NOS. Settling for T.A. Rings is a blessing + Dealing with P.W. is C&V😊

LOL ! Saves drivetrain weight, too.

The steel cogs in my freewheels seemingly last forever.

I'm not sure how many chainrings this bike has had but they are getting harder and harder to find and the cost keeps going up. I'd be willing to take on the small weight differential of a steel chain ring to get nearly infinite life. I'd still have the aluminum crank.

Cheese and crackers!, I saw a Regina Oro Chain for $120, just for the chain! <-- I almost bought it, too.

I'm not sure any 144mm BCD steel road rings were ever made. There may be steel BMX rings, but likely only for 1/8" chain. But 144mm BCD rings are plentiful on eBay, both NOS and used, in a variety of tooth counts, sometimes at very reasonable cost. Just take care to get a road width (3/32") ring rather than a track (1/8") if you need it for a multi-speed bike. If you're running a FG/SS drivetrain, 1/8" chain will run fine on either 1/8" or 3/32" sprockets and chainrings, so you can mix and match.

the stone 144bcd on aliexpress is not for fixed gear, it is for 1x which uses the same chain depending how many speeds you run but it is still just a chainring and would would on a double or triple

is it just us cranky old guys who ride the heck out of our bikes? :)

My recent T.A. ring purchase was the replacement for a cheap Vuelta ring. The Vuelta wasn't expensive, but also wasn't very durable. It was pretty badly worn, and if I was paying attention, I'd have replaced it sooner.
A quick photo....


https://cimg1.ibsrv.net/gimg/bikefor...4964449ffe.jpg

It's a shame that I don't know how many miles are on this ring.

Steve in Peoria (but the bike has about 60,000 miles on it)

High millage chain rings
 

C&V folks tend to be cheapskates ! :innocent:

But that said, "we're not worthy, we're not worthy" ("but the bike has about 60,000 miles on it").... :thumb:


Looks like it's ready for shark's fin soup! :lol:

In the dry southwest back in the 70's, we came up with a theory that using a thin chain lubricant allowed fine grit to embed into the alloy teeth on aluminum chain rings. It could cause chains to wear faster but they were cheaper than chainrings.

We imported Sedis chain on 50 and 100 meter spools. We calculated our cost was about $3.00 a chain - dirt cheap. I replaced my chains every 3000 miles.

Fortunately I put a lot of those old chain in baggies and squirreled them away. Several years back I was looking for a chain for my 1967 PX-10. I pulled out those old Sedis chains that I'd kept and measured them all. Every one was still good!
(who's cheap now).

verktyg :50:

It's been almost a year since I originally posted this question but I finally ordered some chainrings.

I did some cleaning and maintenance last weekend and was reminded of the wear on the old rings. I want to be sure I have the replacement parts before they are all gone.

Now, what chain should I buy. Regina Oro chains sell for CRAZY prices. Most chains are referred to as 6/7/8 or whatever they are compatible with except that NONE say 5 speed (which is what I have).

@Bad Lag - I don't think it matter much which chain you buy. The inner dimensions are the same, it is the outer dimensions that are different. Get the 6 speed. 3/32 is 3/32 no matter what speed the chain is used for.

I've used my SRAM PC-850 chains on a 5-speed freewheel. If you want something less flexible, perhaps a 3/32" "singlespeed" chain like this would be satisfying, but I haven't bothered to try: https://www.retro-gression.com/colle...x-narrow-chain

No need to spend NOS $$$ on a chain unless you really want to.