Go Back  Bike Forums > Bike Forums > Classic & Vintage
Reload this Page >

So What's With 50T Chainrings?

Notices
Classic & Vintage This forum is to discuss the many aspects of classic and vintage bicycles, including musclebikes, lightweights, middleweights, hi-wheelers, bone-shakers, safety bikes and much more.

So What's With 50T Chainrings?

Old 08-15-20, 09:47 PM
  #1  
Steel Charlie
Senior Member
Thread Starter
 
Steel Charlie's Avatar
 
Join Date: Apr 2009
Posts: 150
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Liked 50 Times in 30 Posts
So What's With 50T Chainrings?

So I've been scouting for a 50t/130mm chainring an it seems as tho they are all made of some incredibly rare and near priceless metal. I mean, I don't think I'm all that scrooge but am I missing something? Is there a secret place to buy them?

OK - I just wanted to whine. Mission accomplished.
Steel Charlie is offline  
Old 08-15-20, 09:52 PM
  #2  
thinktubes 
weapons-grade bolognium
 
thinktubes's Avatar
 
Join Date: Dec 2008
Location: Across the street from Chicago
Posts: 5,275

Bikes: Battaglin Cromor, Ciocc Designer 84, Schwinn Superior 1981

Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Quoted: 642 Post(s)
Liked 610 Times in 312 Posts
I was looking for one last year, and the are hard to find, especially if it's for a performance application. Pricey too!
thinktubes is offline  
Old 08-15-20, 10:00 PM
  #3  
70sSanO
Senior Member
 
70sSanO's Avatar
 
Join Date: Feb 2015
Location: Mission Viejo
Posts: 2,517

Bikes: 1986 Cannondale SR400 (Flat bar commuter), 1988 Cannondale Criterium XTR, 1992 Serotta T-Max, 1995 Trek 970

Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 596 Post(s)
Liked 334 Times in 236 Posts
Have you checked eBay?

John
70sSanO is offline  
Likes For 70sSanO:
Old 08-15-20, 10:15 PM
  #4  
SurferRosa
Seor Member
 
SurferRosa's Avatar
 
Join Date: Dec 2018
Location: Pac NW
Posts: 3,355

Bikes: Old school lightweights

Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
Quoted: 1384 Post(s)
Liked 1,213 Times in 724 Posts
I got a nice one from the ISO thread.
SurferRosa is offline  
Old 08-15-20, 10:42 PM
  #5  
ShannonM
Senior Member
 
Join Date: Jul 2020
Location: Humboldt County, CA
Posts: 245
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 112 Post(s)
Likes: 0
Liked 114 Times in 76 Posts
If you're not brifting, single-speed chainrings can be had in lots of sizes not available elsewhere .The unprofiled teeth and lack of ramps, pins, or other enhancements means that they shift like basically every road chainring made up until about 1987 or so. A little slower and noisier, especially when they're new, but they work fine.

They'd probably work with brifters too, although Sram-man-olo will swear on a stack of negotiable currency that your bike will burst into flames if you try it. Might be a bit fiddlier to set up, and there's gonna be some front shifts that you won't be able to make, like a bail-out shift to the granny while standing on the pedals, but you really shouldn't do that. Walking 100 yards to a good restart spot is way cheaper and less embarrassing than blowing your rear derailleur in half. (Ask me how I know this. Or ask me why I will never run Grip-Shift again, even though they're my favorite indexing MTB shifter of all time. Same answer.)

50s shouldn't be hard to find for 30 bucks or so, in black or silver.

--Shannon
ShannonM is offline  
Old 08-15-20, 11:58 PM
  #6  
canklecat
Me duelen las nalgas
 
canklecat's Avatar
 
Join Date: Aug 2015
Location: Texas
Posts: 11,987

Bikes: Centurion Ironman, Trek 5900, Univega Via Carisma, Globe Carmel

Mentioned: 185 Post(s)
Tagged: 0 Thread(s)
Quoted: 3818 Post(s)
Liked 1,507 Times in 989 Posts
Vintage or any functional chainring? Vuelta make good chainrings for a fair price. I've bought 'em for as little as $7 from Amazon, new but with "damaged packaging" (it was a cardboard foldover stapled to a plastic bag, not a velvet lined exotic hardwood presentation case). The list price of around $20-$30 is very fair.

I have the ramped and pinned 50T Vuelta SE, the plain 38T and 39T small rings. They've all worked fine for a couple of years. I also have something like a 56T, delivered by mistake. I'll probably give it to a friend who likes weird stuff and might be strong enough to use it.
canklecat is offline  
Old 08-16-20, 02:11 AM
  #7  
icemilkcoffee
Senior Member
 
Join Date: Aug 2009
Posts: 240
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
Liked 95 Times in 61 Posts
What speed drivetrain? If its 10 or 9 speed you can find Tiagra 46** and 45** chain rings on EBay all day long and cheap.
icemilkcoffee is offline  
Old 08-16-20, 02:29 AM
  #8  
HTupolev
Senior Member
 
Join Date: Apr 2015
Location: Seattle
Posts: 3,501
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 550 Times in 289 Posts
Originally Posted by icemilkcoffee View Post
what speed drivetrain? If it’s 10 or 9 speed you can find tiagra 46** and 45** chain rings on ebay all day long and cheap.
45 != 50
46 != 50
HTupolev is offline  
Old 08-16-20, 02:48 AM
  #9  
nomadmax 
Senior Member
 
Join Date: Jun 2018
Location: SW Ohio
Posts: 1,645
Mentioned: 92 Post(s)
Tagged: 0 Thread(s)
Quoted: 737 Post(s)
Liked 899 Times in 468 Posts
When you want something uncommon you have two choices; pay up or do without it. C&V ain't for the faint of heart or wallet.
nomadmax is offline  
Old 08-16-20, 03:01 AM
  #10  
HTupolev
Senior Member
 
Join Date: Apr 2015
Location: Seattle
Posts: 3,501
Mentioned: 37 Post(s)
Tagged: 0 Thread(s)
Quoted: 1572 Post(s)
Liked 550 Times in 289 Posts
Originally Posted by nomadmax View Post
When you want something uncommon
The confusing thing is that 50T chainrings aren't uncommon. They just seem to have a high floor price.
HTupolev is offline  
Old 08-16-20, 03:32 AM
  #11  
nomadmax 
Senior Member
 
Join Date: Jun 2018
Location: SW Ohio
Posts: 1,645
Mentioned: 92 Post(s)
Tagged: 0 Thread(s)
Quoted: 737 Post(s)
Liked 899 Times in 468 Posts
Originally Posted by HTupolev View Post
The confusing thing is that 50T chainrings aren't uncommon. They just seem to have a high floor price.
If we were at a BF get together the below text would be spoken words and they would include inflection and all the things written words can't convey. IE they wouldn't come off as abrasive. I said all that to say this; I'm making a case for having a passion, like bicycles, and really enjoying it without the "OMG this is more expensive than buying a new bike" feelings.

We can kibitz the terms "uncommon", "rare" or "just plain expensive compared to everything else". It all comes down to this; if you want something specific you have to be prepared to pay the going price or do without it. I'm sitting in my office with a few bikes that have parts on them that I've paid DEARLY for and I smile every time I look at or ride them. I have zero regrets about how much I paid for any of them.
nomadmax is offline  
Old 08-16-20, 03:38 AM
  #12  
delbiker1 
Mother Nature's Son
 
delbiker1's Avatar
 
Join Date: Mar 2016
Location: Sussex County, Delaware
Posts: 1,600

Bikes: Early 90's Ochsner road, 2006 Schwinn SS DBX, 2014 Orbea Avant MD30, 2004 Airborne Zeppelin TI, 2003 Lemond Poprad, 1989? Fuji Ace, 2001 Lemond Tourmalet, 2014? Soma Smoothie

Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 427 Post(s)
Liked 382 Times in 233 Posts
I will back up canklecat on the Vuelta chain rings. The SE plus work really well. The non-ramped also work, not as smooth or quiet, for a bit less money. I have a lot of miles on the SE plus and they are still in good shape. Sugino has them also, made of steel and more expensive. Also, they are not ramped and pinned.
delbiker1 is online now  
Old 08-16-20, 04:56 AM
  #13  
randyjawa 
Senior Member
 
randyjawa's Avatar
 
Join Date: Apr 2007
Location: Thunder Bay, Ontario, Canada - burrrrr!
Posts: 10,192

Bikes: 1958 Rabeneick 120D, 1968 Legnano Gran Premio, 196? Torpado Professional, 2000 Marinoni Piuma

Mentioned: 174 Post(s)
Tagged: 0 Thread(s)
Quoted: 891 Post(s)
Likes: 0
Liked 493 Times in 319 Posts
When you want something uncommon you have two choices; pay up or do without it. C&V ain't for the faint of heart or wallet.
Close to true but with one exception - patience. I have had to wait/hunt/hope for years to get just what I wanted and at a decent price, sometimes darn near free. What sort of things am I talking about.

There is a Campy 50 tooth ring on Ebay right now. I am interested but broke until next pension check. Even then, the price is a bit high but not that high. If I had the bucks, right now and without a raft of cottage maintenance costs to deal with, I would just buy it.

How about a set of Legnano pantographed high flange hubs for nothing other than a simple trade...


or a take-off (NOS) Legnano pantographed cottered crank set with original take-off bottom bracket. Price - $100.00 US...


or a Legnano embossed head set picked up for free...


And, these days I seek a proper fork for my early to mid sixties Torpado Professional. I might never find one but the hunt and hope make it all worthwhile.

All that said, I will never keep a decent old bike, that I am interested in riding, off of the road just because I do not have everything that I need for a bike. I run what will fit/work until just what I want comes along. And, again, I add that the hunt and score makes it all worthwhile.
__________________
"98% of the bikes I buy are projects".
randyjawa is offline  
Likes For randyjawa:
Old 08-16-20, 08:40 AM
  #14  
mstateglfr 
Sunshine
 
mstateglfr's Avatar
 
Join Date: Aug 2014
Location: Des Moines, IA
Posts: 11,186

Bikes: '18 class built steel roadbike, '19 Fairlight Secan, '88 Schwinn Premis , Black Mountain Cycles Monstercross V4, '89 Novara Trionfo

Mentioned: 94 Post(s)
Tagged: 0 Thread(s)
Quoted: 4474 Post(s)
Liked 1,566 Times in 949 Posts
Your question should be whats with 130mm cranks rather than whats with 50t chainrings.
I think the mix probably makes em a bit uncommon and maybe that makes em a bit more expensive.
110 50t rings are readily available...not sure for how much less though.

this is $29. https://www.universalcycles.com/shop...0aAmseEALw_wcB
mstateglfr is offline  
Old 08-16-20, 09:18 AM
  #15  
Lascauxcaveman 
Senior Member
 
Lascauxcaveman's Avatar
 
Join Date: Nov 2011
Location: Port Angeles, WA
Posts: 7,885

Bikes: A green one, "Ragleigh," or something.

Mentioned: 178 Post(s)
Tagged: 0 Thread(s)
Quoted: 1573 Post(s)
Liked 446 Times in 261 Posts
Couple hundred 130bcd 50T listings on eBay right now, most are between $12 and $30.
__________________
● 1971 Grandis SL ● 1972 Lambert Grand Prix frankenbike ● 1972 Raleigh Super Course fixie ● 1973 Nishiki Semi-Pro ● 1980 Apollo "Legnano" ● 1984 Peugeot Vagabond ● 1985 Shogun Prairie Breaker ● 1986 Merckx Super Corsa ● 1987 Schwinn Tempo ● 1988 Schwinn Voyageur ● 1989 Trek 400 ● 1989 Bottechia Team ADR replica ● 1990 Cannondale ST600 ● 1993 Technium RT600 ● 1996 Kona Lava Dome ●
Lascauxcaveman is offline  
Likes For Lascauxcaveman:
Old 08-16-20, 09:55 AM
  #16  
RobbieTunes 
Senior Member
 
Join Date: Dec 2007
Posts: 26,927
Mentioned: 34 Post(s)
Tagged: 1 Thread(s)
Quoted: 378 Post(s)
Liked 1,194 Times in 767 Posts
Originally Posted by Lascauxcaveman View Post
Couple hundred 130bcd 50T listings on eBay right now, most are between $12 and $30.
I think this may be the case. 130BCD chain rings, of course, go from 55T down to 39T and most sizes in between.

There is always a combination of factors that create trends. This situation could include the downward trend of front chainrings, the widening trend of rear cassettes,( i.e. the era of "wide doubles,") the aging legs of the cycling population needing gearing less on the top end, the end of the triple as a mainstream application, the limited flexibility of the new cranksets as far as being able to fit multiple needs, and gravel bikes. Toss in the 135BCD of some Campy, and what a soup sandwich it is.

As the 'max says, if you want something specific, you have to be willing to wait, sacrifice, and pay, especially if you want it RFN. Especially polished, ramped 130BCD 50T chainrings. As others say, patience is a virtue. Sometimes a donor bike, bought for the rings and then re-sold with other rings swapped in, is a cheap alternative.

The modern trend seems to be simply starting out with 110BCD and then going from there. This is a bit exacerbated by the move to 4-arm cranksets (and 3-arm are coming).

My suggestion to the OP is to perhaps look at older-school 110BCD cranksets, which are also getting harder to find, then go from there. I've been hoarding a pair of 110BCD triple square-taper cranksets. They look C&V, handle a wide range of rings, and work. Just haven't found a bike for them yet, but my touring rig had one, set up 50/34/26.
__________________

BLDMAMTAOLD


RobbieTunes is offline  
Old 08-16-20, 10:58 AM
  #17  
jackbombay
Senior Member
 
Join Date: Jun 2019
Location: Portland Oregon
Posts: 871
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 408 Post(s)
Liked 383 Times in 229 Posts
Originally Posted by RobbieTunes View Post
This is a bit exacerbated by the move to 4-arm cranksets (and 3-arm are coming).
Just like my 1973 Raleigh Super Course! The bike industry can't make anything new it seems ;-)
jackbombay is offline  
Likes For jackbombay:
Old 08-16-20, 12:02 PM
  #18  
pcb 
Senior Member
 
pcb's Avatar
 
Join Date: Jan 2012
Location: Joisey
Posts: 1,122
Mentioned: 63 Post(s)
Tagged: 0 Thread(s)
Quoted: 211 Post(s)
Liked 294 Times in 125 Posts
In my way-back vintage days, 50t 130bcd rings were much less common than 52-53t rings. They existed, but almost nobody was spec'ing them on complete bikes, so there was primarily only aftermarket activity. I'm kinda making up numbers, but let's say Shimano was getting OEM orders for hundreds of thousands of 39-53 cranksets for complete bikes, every year, and aftermarket distributor orders in the thousands, maybe tens of thousands worldwide, maybe not.

As 11t cassettes became more popular, 34/50 110bcd compact gearing took over, and 130bcd cranks on new bikes practically disappeared.

There still is an aftermarket for 50t/130, so you can buy new rings, and if it doesn't have a high-end name on it, shouldn't be too pricey. But it ain't a big aftermarket, and there's likely fewer spare 50t/130 rings kicking around our spare parts boxes to find 'em everywhere on the cheap. I might have 2-3 in my 130 chainring box, while I'd probably be underestimating at 10-12 50t/110 rings gathering dust.

Up till now OP/Steel Charlie hasn't told us what he thinks cheap/pricey is in actual dollar terms, but it wouldn't surprise me if 50/130 was thinner on the ground than 50/110.
__________________
Fuggedaboutit!
pcb is offline  
Old 08-16-20, 12:16 PM
  #19  
OldsCOOL
Senior Member
 
OldsCOOL's Avatar
 
Join Date: Jul 2004
Location: northern michigan
Posts: 13,014

Bikes: '77 Colnago Super, '76 Fuji The Finest, '88 Cannondale Criterium, '86 Trek 760, '87 Miyata 712

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 584 Post(s)
Liked 349 Times in 190 Posts
My recent purchase on the ‘83 UO-14 came with a Stronglight crankset with a 50/38. Surprised me to see it. Personally, I enjoy that 50t on top. Nice gear.
OldsCOOL is offline  
Old 08-16-20, 12:29 PM
  #20  
Bob the Mech
Senior Member
 
Bob the Mech's Avatar
 
Join Date: Aug 2020
Location: South Wales
Posts: 194

Bikes: 2016 Trek Emonda S6 frameset, custom build (road). 1995 Dawes Genesis Reynolds 531 Competition frameset, custom build (road). 1996 Orange C16R frameset, custom build (retro MTB). Coyote Dual hard-tail, custom build (MTB).

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Liked 71 Times in 51 Posts
Stronglite 50T 130BCD

Stronglite Dural 5083 alloy 9/10 Speed Chainring 130mm BCD five arm spider for Shimano. Works with an 8 speed set up too. Got a 50/38 ring set on a Shimano 1055 crank, running 1056 8 speed STIs with no issues. In the UK retail price 25 ($33?) plus postage.
Attached Images
File Type: jpg
Re-build No1 and update.jpg (226.1 KB, 138 views)

Last edited by Bob the Mech; 08-16-20 at 12:33 PM. Reason: Additional info added
Bob the Mech is offline  
Old 08-16-20, 01:59 PM
  #21  
icemilkcoffee
Senior Member
 
Join Date: Aug 2009
Posts: 240
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 129 Post(s)
Liked 95 Times in 61 Posts
Originally Posted by HTupolev View Post
45 != 50
46 != 50
45** and 46** refers to the Tiagra series.
Tiagra 4550 9 speed 50t 110mm chain ring $27.44 free shipping
https://www.ebay.com/itm/Shimano-Tia...r/112819256828
icemilkcoffee is offline  
Old 08-16-20, 02:55 PM
  #22  
repechage
Senior Member
 
Join Date: Jun 2006
Posts: 14,914
Mentioned: 95 Post(s)
Tagged: 0 Thread(s)
Quoted: 1513 Post(s)
Liked 442 Times in 354 Posts
Originally Posted by randyjawa View Post
Close to true but with one exception - patience. I have had to wait/hunt/hope for years to get just what I wanted and at a decent price, sometimes darn near free. What sort of things am I talking about.

There is a Campy 50 tooth ring on Ebay right now. I am interested but broke until next pension check. Even then, the price is a bit high but not that high. If I had the bucks, right now and without a raft of cottage maintenance costs to deal with, I would just buy it.

How about a set of Legnano pantographed high flange hubs for nothing other than a simple trade...


or a take-off (NOS) Legnano pantographed cottered crank set with original take-off bottom bracket. Price - $100.00 US...


or a Legnano embossed head set picked up for free...


And, these days I seek a proper fork for my early to mid sixties Torpado Professional. I might never find one but the hunt and hope make it all worthwhile.

All that said, I will never keep a decent old bike, that I am interested in riding, off of the road just because I do not have everything that I need for a bike. I run what will fit/work until just what I want comes along. And, again, I add that the hunt and score makes it all worthwhile.
Boy those hubs are cool... I was surprised first time I saw them. Private label Campy?!?
repechage is offline  
Old 08-16-20, 04:38 PM
  #23  
John E
feros ferio
 
John E's Avatar
 
Join Date: Jul 2000
Location: www.ci.encinitas.ca.us
Posts: 20,028

Bikes: 1959 & 1960 Capo; 1982 Bianchi; 1988 Schwinn KOM-10;

Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Quoted: 865 Post(s)
Liked 227 Times in 176 Posts
I miss the good old days when you could order any size of chainring, as well as any assortment of cogs right off the SunTour or Regina board at the local bike shop. I have been heavily into custom gearing for decades, and 50T is one of my favorite outer chainring sizes.
__________________
"Far and away the best prize that life offers is the chance to work hard at work worth doing." --Theodore Roosevelt
Capo: 1959 Modell Campagnolo, S/N 40324
Capo: 1960 Sieger (2), S/N 42624, 42597
Peugeot: 1970 UO-8, S/N 0010468
Bianchi: 1982 Campione d'Italia, S/N 1.M9914
Schwinn: 1988 Project KOM-10, S/N F804069
John E is offline  
Old 08-16-20, 05:08 PM
  #24  
canklecat
Me duelen las nalgas
 
canklecat's Avatar
 
Join Date: Aug 2015
Location: Texas
Posts: 11,987

Bikes: Centurion Ironman, Trek 5900, Univega Via Carisma, Globe Carmel

Mentioned: 185 Post(s)
Tagged: 0 Thread(s)
Quoted: 3818 Post(s)
Liked 1,507 Times in 989 Posts
Yikes. I just noticed the same 50T 130 BCB Vuelta SE Plus I bought for $7.36 in 2017 is now $55 on Amazon.

But to be fair, that was an Amazon warehouse sale (supposedly damaged packaging -- it wasn't), and the usual price would have been around $25-$30.

The pandemic has disrupted the supply chain, so it's really weird now. And will be for some time to come. I bought a bunch of parts from REI that I didn't have any immediate need for, but couldn't resist Shimano BB-UN55 bottom brackets for $8 each, or a few older style Shimano and SRAM chains for less than half price. I will need them eventually.

In the two weeks since I bought those, REI's parts pegboard is pretty much bare now. I didn't clean 'em out (I didn't hoard toilet paper either -- I already had enough to last a year since I buy in bulk once or twice a year), so I'm betting other cyclists had the same idea -- buy now because this stuff may not be available for awhile.
canklecat is offline  
Old 08-16-20, 06:17 PM
  #25  
Steel Charlie
Senior Member
Thread Starter
 
Steel Charlie's Avatar
 
Join Date: Apr 2009
Posts: 150
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 53 Post(s)
Liked 50 Times in 30 Posts
Yeah - I know about the bunch on ebay. The scam is that by the time you select 50t the price goes up. Or it comes from China which has not provided a good experience for me yet after several tries. Looks like the Tiagra from Penn @$28(+tax) is the easiest and most likely to show up.

I was just considering the 50t as a means to use that silly 9spd cluster a bit more on the smaller cogs since I'm not really a 53t kinda guy any more. TTTT I never actually saw much use for more than the std.52 AFAIC wimp that I am. To be completely honest the 52x14 was plenty high enough for me even when I was racing vets and that was a few decades ago hahaha.

Anyway, NBD. Like I said, I was just whining. And I did learn looooong ago - pay the price or do without

thanks all
Steel Charlie is offline  

Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information -

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.