compact double cranksets
#27
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grad stud.

Joined: Apr 2010
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From: Houston, TX
Bikes: 1987 Schwinn Voyageur
Today's compacts are typically 50/34. I think the purpose is to serve the other side of the spectrum - it allows people that don't want a triple to approximate those low gears that a true triple provides. It's a compromise, for folks that insist upon doubles but can't use standard doubles as God intended. 
I'm one of those folks, but I have no shame and cannot be humiliated. So, I use a triple and ride anywhere I damn well please.

I'm one of those folks, but I have no shame and cannot be humiliated. So, I use a triple and ride anywhere I damn well please.

. Another way to look at it is that the compact double crankset with a wide range cassette gives you the really low gear and the top gear you want, without having to use a triple crankset to get it as one did when there were only five or six speed freewheels. When there were only five speed freewheels, I used a triple crankset to get the low and high gears I wanted on a touring bike. Now with a nine speed cassette you can get that using a double crankset and forgoing use of a triple crankset. The double crankset is easier to shift, not that a triple was hard, but a double is arguably easier. A double crankset weighs less than a triple too, and has less chainring bolts to come loose (!)
And in fact, a chainring bolt on my granny did come loose during a ride. Couldn't figure out what was causing such resistance in my pedaling until I had rubbed a few flecks of paint off the stays
#28
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From: Olympia, WA
Bikes: 2006 Trek 2100, 1973 Crescent Mark XX, 196x Peugeot PX-10
Pardon a noobish question but what exactly is meant by a "compact double"?
I have a Stronglight 93 52/38 that I'm thinking of dropping to 50/38. It can't go any lower than 38 with 122 BCP, but I got around Germany and Luxembourg with it okay with a 14-28 freewheel back in the early 80s.
I have a Stronglight 93 52/38 that I'm thinking of dropping to 50/38. It can't go any lower than 38 with 122 BCP, but I got around Germany and Luxembourg with it okay with a 14-28 freewheel back in the early 80s.
#29
I'm torn about the whole compact crank thing. But also a lesser man than BBM, and as such unable to stick a triple on my roadies.
Currently trying out a compact (again) on my Merckx w 8 speed Campy. And it is just because of this 2 mile very steep hill on my favorite ride that really rips the cartilage out of the knees.
But in a touring realm a triple is a must. Why not? Everything is already so damn heavy.
Currently trying out a compact (again) on my Merckx w 8 speed Campy. And it is just because of this 2 mile very steep hill on my favorite ride that really rips the cartilage out of the knees.
But in a touring realm a triple is a must. Why not? Everything is already so damn heavy.
#30
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grad stud.

Joined: Apr 2010
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From: Houston, TX
Bikes: 1987 Schwinn Voyageur
Pardon a noobish question but what exactly is meant by a "compact double"?
I have a Stronglight 93 52/38 that I'm thinking of dropping to 50/38. It can't go any lower than 38 with 122 BCP, but I got around Germany and Luxembourg with it okay with a 14-28 freewheel back in the early 80s.
I have a Stronglight 93 52/38 that I'm thinking of dropping to 50/38. It can't go any lower than 38 with 122 BCP, but I got around Germany and Luxembourg with it okay with a 14-28 freewheel back in the early 80s.
A compact double usually runs more around 50/34 (16 teeth spread usually?), and is often run with wide cassettes (11-32). This way, you get the range of a triple crankset with a double front crankset. The reasons for wanting a double as opposed to a triple tend to vary for different people, but they're usually something like "it's simpler and lighter".
#31
It has been my experience that I've seen very few companies that make triple cranks anymore on road bikes. The compact double has replaced the triple you used to see on a bikes lines lower end skinny legged hill climber version. I haven't seen any modern triples other than the Sugino for a while.
#32
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grad stud.

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From: Houston, TX
Bikes: 1987 Schwinn Voyageur
And personally, I like just having two settings on my left friction shifter
.
#33
Steep, I do know steep. I ride my yellow Grandis Max with its photo above near daily on climbs on La Jolla's Mount Soledad in San Diego, with some climbs being 15% and 20%. Low gear for the knees, high gear to bomb the downhills.
#34
What??? Only 2 wheels?


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I set up my gears with 48/36 looooong ago, and eventually changed it to 48/34. My reason for dropping the 52 to 48 at all was because I never used the small cog (on a 14-28 5-speed freewheel). I dropped the 36 to 34 more recently was because I was steep hitting hills late in a long rides.
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#35
I think so with mountain bikes where you want to minimize shifting the front derailleur and stick to shifting the rear derailleur, but touring, I dunno, these days. I'm on the cusp. I've credit card cycle toured on that Mondia with double chainrings and a seven speed freewheel, and with more gears in the rear, I could easily use a double for fully loaded touring. My non-C&V Raleigh Sojourn touring bike that I have used for fully loaded cycle camping came with a triple, so I use it. I could get the same gear range with a double, easily get by with less gears in number, and it would be simpler to use. I will convert it one of these days. Back in the days of triple cranksets and five speed freewheels, I cycle toured / camped extensively. I had maybe 12-13 usable gears and so did everyone, and we thought that was a lot of gears . With a nine speed wide range cassette on a triple crankset, do I really need about 23 or so usable gears... for cycle touring? It isn't a time trial with fine tuning of cadence/effort.
#36
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From: san leandro
Bikes: enough bikes to qualify for Hoarders......
I have both my wife's and my own bikes set up with compact doubles now, a Sugino on her Panasonic and a Campy Centaur on my gitane. The gearing is ideal for me since I live at the base of some hills.
#37
It has been my experience that I've seen very few companies that make triple cranks anymore on road bikes. The compact double has replaced the triple you used to see on a bikes lines lower end skinny legged hill climber version. I haven't seen any modern triples other than the Sugino for a while.
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#38
I have one bike (the Ciocc) that has a compact double on it. Riding it, I have climbed the steepest grades we have to offer - so that's not really an issue. What is an issue is the increased frequency of double shifting. It is a comparative pain in the ass as opposed to the triple that I know and love.
The triple, at 53/42/30, is more or less a standard double with bailout gears in case I need them. The majority of my riding is using the middle ring, and shifting up and down the back as needed. It suits me and the way I ride the local terrain. I use the big ring about a third of the time, and the bail-outs much less frequently. But when I need them, I REALLY need them. So I keep them around.
The triple, at 53/42/30, is more or less a standard double with bailout gears in case I need them. The majority of my riding is using the middle ring, and shifting up and down the back as needed. It suits me and the way I ride the local terrain. I use the big ring about a third of the time, and the bail-outs much less frequently. But when I need them, I REALLY need them. So I keep them around.
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"Love is not the dying moan of a distant violin, it’s the triumphant twang of a bedspring."
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#39
Too low? Not if you don't race and live in flat to slightly rolling terrain (south Louisiana) where the biggest "hill" is an overpass - like I do. I run 47-41 chainrings with a 13-23 (6-speed freewheel). I don't race anymore and most of my rides are solo training/recreational rides. I typically cruise at 17 mph in my 41/17 (63.6-inch) gear. Unless you live in hilly terrain and/or are a competitive cyclist, then I don't see a need for a 53 tooth ring (unless you just like to look macho).
#40
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From: Pearland, Texas
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dashuaigeh, I bought a complete bike once just for the frameset, too late in the year to order one in that paint scheme. It came with a 7S compact double and at first I thought the compact double was a neat idea, but for me it was 'just not right' after some miles had passed. I selected that frame set to cope with my knee injury and mulled about a road triple, a compact double and even a mountain bike type group. I went with the road triple and an 8S. Honestly it did look a bit odd to me at first, but my knee loves it.
While my knee is much better I still choose that bike when going on long rides just in case...
With a 9S or more rear gearing a compact double may make more sense as I like a close ratio rear. I came close to trying a compact double on a recent mini build of my 3.0, but just couldn't do it.
Brad
While my knee is much better I still choose that bike when going on long rides just in case...With a 9S or more rear gearing a compact double may make more sense as I like a close ratio rear. I came close to trying a compact double on a recent mini build of my 3.0, but just couldn't do it.
Brad
#41
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From: Collegeville, PA
Bikes: Ruckelshaus Randonneur, Specialized Allez (early 90's, steel), Ruckelshaus Path Bomber currently being built
I have a 52/42/30 on my main ride and never (and I mean NEVER) use the big ring, and have only used the small ring once or twice. I think a 44/36 would be perfect for me...but not easy to find, I would end up buying a crankset and then replacing the rings, and decent rings aren't cheap.
#42
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From: Olympia, WA
Bikes: 2006 Trek 2100, 1973 Crescent Mark XX, 196x Peugeot PX-10
#43
I run 50-34 with a 10 speed cassette on my bianchi. The big cog in the rear is a 29 because that's the largest i could run with a mid length campy rear mech. I really like the setup and it's great for any type of hills I have in my area so long as I'm not all loaded up with a bunch of extra weight (not fat, but like touring digs).
It would make a nice rando bike.
Right now I'm setting up my Carlton with a TA cyclotourist with 48/34 rings and a 5 speed 13-34 freewheel in the rear. I'm building it geared a little lower because I'd basically like to for all intents and purposes to replace riding my touring bike when I want to be lazy and I want to be able to comfortably carry a load up hills with it all day long should I need to.
I might spin it out in the 48/13 but we'll see. I can't imagine that happening often enough that I'd care.
I really like compact setups especially in an indexed system because I personally hate getting an indexed triple to shift perfectly with no rubbing. Plus there is a weight savings, the simplicity of less parts, and having more efficient usable gearing. A triple has a lot of gearing options that I never use.
It would make a nice rando bike.
Right now I'm setting up my Carlton with a TA cyclotourist with 48/34 rings and a 5 speed 13-34 freewheel in the rear. I'm building it geared a little lower because I'd basically like to for all intents and purposes to replace riding my touring bike when I want to be lazy and I want to be able to comfortably carry a load up hills with it all day long should I need to.
I might spin it out in the 48/13 but we'll see. I can't imagine that happening often enough that I'd care.
I really like compact setups especially in an indexed system because I personally hate getting an indexed triple to shift perfectly with no rubbing. Plus there is a weight savings, the simplicity of less parts, and having more efficient usable gearing. A triple has a lot of gearing options that I never use.
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#44
Yep, me too. That's my biggest beef with a triple, especially since the additional weight doesn't normally amount to much. I guess that means I need to improve my wrenching skills...or be more patient.
#45
yeah or say eff it and either go friction in the front, or put in a compact. I'd rather be riding then screwing with getting a brifter/ergo/whatever to shift a triple perfectly.
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#46
Pardon a noobish question but what exactly is meant by a "compact double"?
I have a Stronglight 93 52/38 that I'm thinking of dropping to 50/38. It can't go any lower than 38 with 122 BCP, but I got around Germany and Luxembourg with it okay with a 14-28 freewheel back in the early 80s.
I have a Stronglight 93 52/38 that I'm thinking of dropping to 50/38. It can't go any lower than 38 with 122 BCP, but I got around Germany and Luxembourg with it okay with a 14-28 freewheel back in the early 80s.
#47
https://www.flickr.com/photos/boxdogbikes/5017153026/
#48
I've had issues getting lower end Shimano triples set up right, but never with a Campagnolo triple. They adjust right up.
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"Love is not the dying moan of a distant violin, it’s the triumphant twang of a bedspring."
S. J. Perelman
"Love is not the dying moan of a distant violin, it’s the triumphant twang of a bedspring."
S. J. Perelman
#49
That might be my problem. The one indexed triple I've had the most problems with is Sora on my wife's Trek 1000. We have Truvative cranks with a 105 FD on our Cannondale tandem and it was definitely easier.
#50
Or you could get a Tiagra FD. You'll see them being used on most modern touring bikes with 135 rear because they having a wider cage to accommodate the additional chain swing. They are also rather inexpensive.





