Bike Build - Triple or Compact?

[keldenmar]

Jumping on TE forum to get some outside opinions about my new bike.

Ordered a Seven Ti Axiom frame and will have my local mechanic build it up for me. My typical rides are 30-50 miles on flat terrain (local) and do several week-long bike rides in hilly areas each year. The bike can accommodate racks, fenders and bigger tires if I want to do some loaded touring. My dilemma is whether to go with a triple or a compact. Most high end bikes are equipped with a compact but I'm not sure that is best for me. I'm 62 and want this bike to get me to age 85 and beyond. The bike will have disc brakes that will make descending easier on the grip. Also, I ridden a triple for the last 20 years so there would be a learning curve for the compact.

There are fewer and fewer triple sets to choose from so what is the best way to go?

[Crankin]

OK, I am just a year younger than you and I have totally switched from a triple to a compact. First, I had a custom Ti Guru frame built, very similar to your bike. I went with a compact, with a mountain rear cassette , giving me even lower gears that were on the triple I also had (it's an 11-34). There was not much of a learning curve, except that I had to stop thinking of the smaller ring as the "granny gear." I use it a lot more! Last fall I bought a new carbon bike and it also has a compact. But now, Shimano makes a road cassette that goes to a 32 cog, which is what I got. You need to be concerned about the gear ratios, not whether it is a triple or compact. Unless you are going to be doing very heavy loaded touring (which you probably wouldn't do with this bike), there is no need for a triple.

[salsabike]

I have a Seven Ti Axiom and did the same kind of thing that Crankin did--got a mountain cassette. My lowest gear is about the same as I had with my old Bianchi's triple--I live in a very hilly place, and I like doing hills, so that was essential. All working very well.

[khg]

What Crankin said--what is most important is your gear ratios, and you can now get as wide a range with a compact double as with a triple. A reason to go with a triple over a double would be that with the double a wide range will mean a little bigger jump between gears than the same range in a triple. Sheldon Brown's gear ratio calculator might be useful--you can plug in the info for what you have with your triple, and see what would produce the same ratios with a double. http://sheldonbrown.com/gears/

[OakLeaf]

I've been off TE for a bit and late to this thread, but I'll reiterate what I've said before: it's less about the gear range and more about the RPM range. Riders have "power bands" just like internal combustion engines do. If you're comfortable in a wide range of RPMs (like a RPM range of 15+), then by all means get a compact. But if you get in a situation, more than occasionally, where your bike just doesn't have the right gear - upshift and you're "lugging," downshift and you feel like you're spinning like a sewing machine and not getting anywhere - that means you're the type of rider who would do better with a triple, which will give you more steps between the gears.

Just like an 8-speed transmission in a car vs a 3-speed.

[tulip]

I will differ. If you will be touring with a loaded bike, a triple will definitely be your friend. I have bikes with compacts, bikes with triples and bikes with doubles. If I'm doing any touring with any load (and I do credit card touring, so no tents), I really enjoy my triples.