Compact Double or Triple?

[mauisher]

I'm having a new bike built and will have a choice of installing either a compact double or a triple. I live in a very hilly place and have been using a Dura Ace triple 9 speed with a 12-27 on the back. I also take my bike on multi-day rides over varying terrains. The triple is good quality and it's worked fine. I also have an old Ultegra 7 speed that I converted to a compact double. It's ok but since it's a 7 speed it has big jumps between gears, so it's not a good comparison to the triple.

With the options out there today with the compact doubles (i.e., SRAM Apex or running a Shimano 10 speed mountain rear derailleurs with a 10 speed cassette) I'm considering perhaps a compact double with the ability to get the gears for the big hills. However, with the compact I'm still concerned about big jumps between gears and constantly having to shift the front derailleur. Many times with the triple, I can stay in the middle ring for much of the ride and have small jumps between gears. I do have a few knee issues and am getting older!

So, sorry for the long-winded post, but which would you recommend and why?

[alpinerabbit]

aaah the old staple discussion...

whatever makes you happy

there are a bunch of threads on this forum on the same topic if you care to search for them. There will be those who say that shifting is more precise on the double and all the counterargumentation will follow suit

I have one of each, Ultegra. I find the jumps not too too big, or put it this way: I don't notice any difference. note that the new gearsets are 10spd in the back so you have one more than you are used to now, meaning you have pretty small jumps.

I personally don't mind shifting on the front, I haven't counted whether I shift more on the double than the triple so I'm no help there...

on my compact, I managed to have a 30 "rescue" cog (from Marzocchi I believe) installed on the regular 12-27 Ultegra cassette, I gave up the 16 for that. That really helps me get up the big hills.

Just try to keep the equivalent of a 30-27 combo from your triple on the compact set and your knees should be happy. Or stick with the triple and try to treat your knees to the biggest granny gear you can get in the back....

[Veronica]

I put the SRAM Apex onto my Cervelo after a few months of riding it. My other two bikes have super small gears and my knees just prefer spinning up our hills. So now I have an 11 - 32 in the rear and a 50-34 on the front. The last three downshifts on the rear are pretty big jumps and I will often cycle back and forth between gears in the rear as I start a climb.

For shifting in the front, I know that once I'm doing less than 10 miles per hour, I need to be in the little ring.

I had Force on the rear before I got the Apex and I have to say the Apex shifts just as nicely as the Force did. I did end up adding 1/4 pound to my race bike when I made the switch.

Veronica

[indysteel]

When I built my last bike, I went with a compact not because I wanted to but because my right knee was not happy with the Q factor of the triple on my other bike. After figuring out that Shimano, SRAM and Campy triples all have roughly the same Q factor, I opted for a 50-34 Campy compact with a 10 speed 13-26 in the rear. If Campy made a 12-27, I likely would have gone with it.

From a climbing perspective, I'm generally pretty happy with the set up, as I've only lost my smallest of small gears, but I miss my triple for other reasons. I have a harder time now finding just the right gear for flat and/or windy conditions. I also hate compact on rolling terrain. I used to use my middle ring a lot for rollers. Now I find myself having to shift front and rear more than I'd like to power up them. I also occassionally run out of big gears.

So, but for my IT band irritation, I'd prefer a triple.

[ginaleah]

My sister (who is a cyclist) and I have had this discussion and we both come down on the triple side! When I bought my new bike nearly every shop tried to talk me out of the triple, saying it's not really necessary, not that different from a compact double, etc. But I sometimes pull my kid in a trailer and I love to be able to keep my cadence up going up the hills even without the trailer so I am totally attached to having those granny gears!

[Seajay]

Another case of the bike industry racer boys forcing us to choose from products we don't want. (white tires, white bar tape, compact doubles etc.)

[TxDoc]

aaah the old staple discussion...
whatever makes you happy

I have to agree here, the gearing choice is a common debate here, and is very personal. The terrain definitely is a factor - but also personal preference and riding style.
Try a few bikes with a triple, then a few with a standard double, and then a few with a compact double - and see what suits your riding style best.
The 'big jumps' you mention were common with 5-6-7 speed cassettes, but are very unlikely today with 10 or 11 cogs.

[mauisher]

Thanks for the replies. Sorry this is an "old" subject but it seems the technology keeps changing which keeps this discussion going. It's hard for me to try any bikes here in my size (small or 52 cm c-t) without a triple due to a limited inventory at the local bike shops. Most of the bike shops here recommend a triple due to the mountains and wind and that's pretty much what they carry. I can only compare what I have (7-speed compact and 9-speed triple), so your opinions are important. Thanks, again.

[ridebikeme]

I built a bike with a compact this summer, after always riding a regular double.After roughly riding the compact 1200- 1500 miles at home, I decided to take it on two hilly tours. What i found was that when I wanted midrange gears, i no longer had them. So i would definitely agree with Indysteel on this one.In the big ring(50) I am fine, and likewise in the small ring(34) I am fine...but there's nothing adequate in between. I ride a 10 speed Campy cassette(12-25). Quite frankly, I was happier with my regullar double.

If I lived in flatter area, I would be happy with the compact because I could stay in the big ring longer. But the reality to me is that this is something that the bike industry has told us that we need, and in the hilly areas a triple is much more accomodating!

[ny biker]

I'm having a new bike built and will have a choice of installing either a compact double or a triple. I live in a very hilly place and have been using a Dura Ace triple 9 speed with a 12-27 on the back. I also take my bike on multi-day rides over varying terrains. The triple is good quality and it's worked fine. I also have an old Ultegra 7 speed that I converted to a compact double. It's ok but since it's a 7 speed it has big jumps between gears, so it's not a good comparison to the triple.

With the options out there today with the compact doubles (i.e., SRAM Apex or running a Shimano 10 speed mountain rear derailleurs with a 10 speed cassette) I'm considering perhaps a compact double with the ability to get the gears for the big hills. However, with the compact I'm still concerned about big jumps between gears and constantly having to shift the front derailleur. Many times with the triple, I can stay in the middle ring for much of the ride and have small jumps between gears. I do have a few knee issues and am getting older!

So, sorry for the long-winded post, but which would you recommend and why?

After re-reading this, I'm thinking that if you're happy with the triple, just get another triple. That was my plan originally, and the only reason I switched was because they had a really good price on a higher-quality bike that came with a compact double. Getting a triple with a 10-speed cassette might actually get you some easier gears than you have now, to help your knees on the hills.

You can also compare gear combinations using Sheldon's gear calculator. Enter the gears on your current bikes and then enter whatever you're considering for the new bike, to get a feel for how different they might be and how much difference there is between each gear.

http://www.sheldonbrown.com/gears/

[sundial]

I have both a compact double and a triple.

Depending on the terrain, I like having the triple for climbing really steep grades and roller coaster hills and the double for flattish roads. My favorite bike is touring bike with mountain bike gearing on it.

[buffybike]

I have a triple on my road bike and have never used a compact double. The guys at my LBS tried to talk me into a compact double with a mountain bike cassette in the rear when I upgraded to Shimano 105, but since I'm moving to CO soon, I figured I would need a triple on those hills. Plus, my knees are shot and I've got to baby them.

Now that my riding has much improved from a year ago, I'm kinda wishing I'd gone with a double for 3 reasons: (1) it's lighter, (2) I'm topping out in the big chain ring on the flats and descents, (3) I've only used the smallest chainring a couple of times. In a perfect world, I'd keep my current setup for longer, hilly rides and have a compact for shorter and/or less hilly ones. If the right deal came along....

[indysteel]

I have a triple on my road bike and have never used a compact double. The guys at my LBS tried to talk me into a compact double with a mountain bike cassette in the rear when I upgraded to Shimano 105, but since I'm moving to CO soon, I figured I would need a triple on those hills. Plus, my knees are shot and I've got to baby them.

Now that my riding has much improved from a year ago, I'm kinda wishing I'd gone with a double for 3 reasons: (1) it's lighter, (2) I'm topping out in the big chain ring on the flats and descents, (3) I've only used the smallest chainring a couple of times. In a perfect world, I'd keep my current setup for longer, hilly rides and have a compact for shorter and/or less hilly ones. If the right deal came along....

Out of curiosity, what set up do you have with your triple? Depending on the cassette you're now using, you would likely have had smaller gears if you'd gone with a compact and mountain cassette.

I can't stress this enough in discussing compacts versus triple: a compact with the right cassette can replicate or even exceed the granny gears that you have with your typical triple set up.

[mauisher]

Indysteel, What Shimano set-up would you recommend for a compact that would meet or exceed a common triple. Looking for Ultegra quality. Thanks

[oz rider]

I can't stress this enough in discussing compacts versus triple: a compact with the right cassette can replicate or even exceed the granny gears that you have with your typical triple set up.

+1. I've ridden traditional and compact doubles with similar cassettes and a triple. The new tourer got a compact double and a dinner plate - weight, simplicity, Q factor, hassle factor. It's kind to a dodgy knee and can go up pretty well anything.