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"Upgrading" triple to double (backwards, I know)(14 posts)

"Upgrading" triple to double (backwards, I know)bigdeal
Aug 1, 2002 7:25 AM
I'm trying to shave some weight off my bike currently set up with ultegra triple. I'm looking at swapping out the triple crank/bb for a double (DA or carbon) and getting a DA cogset (12/27), my question is: do I have to swap out anything else (shifters, FD?). Thanks in advance!
re: "Upgrading" triple to double (backwards, I know)jtolleson
Aug 1, 2002 7:44 AM
You'll need to swap your front derailleur also. Although the Ultegra shifters are compatible with either double or triple, I don't know if it will make a difference that the DA double is a 53/39 and your old Ultegra triple is a 52/42/30.

The weight savings here is miniscule for the money. Are you sure you aren't just wanting to do it to look "cooler?" I think a lot of people (not saying you are one of them) dump a bunch of money into getting ride of a triple merely because they are way to concerned with what others think.

What kind of bike is this? (ie., is it worth the $300 investment, especially given that it won't assist the bike's resale value, if that is important to you, or make much difference in ride quality... maybe a slightly stiffer crank is all).
re: "Upgrading" triple to double (backwards, I know)Chen2
Aug 1, 2002 8:12 AM
If you want to spend the money, replacing the Ultegra rear derailleur with the Dura-Ace short (double) rear der will cut quite a bit of weight. Changing the front der is also a good idea. I prefer the D-A chain, it just depends on how much you want to spend. And you don't need to change the shifters, but- the D-A double shifters are smoother and they don't have those extra detents to mess with.
~Al
tell us about the rest of the bikeDougSloan
Aug 1, 2002 9:32 AM
JT is right, you won't notice anything from weight savings here. There may well be other places your money would be better spent, like wheels or maybe even frame or fork. Tell us about the bike.

If you want a double, by all means get it. Don't do it just for weight savings, though.

As far as I know, no systems use the same front derailleur for double and triple. You'll like want a new chain, too.

Doug
Making the same change for simpler climbingPdxMark
Aug 1, 2002 11:01 AM
I have a CAAD5 as my summer commuter/backup and had it built with a Centaur triple. Having ridden it for awhile I realize that I don't like the triple set-up as well as the double. Since I'm getting a bike for my wife, I'll swap the triple onto her bike and put a double on mine. (She OK'd the swap, bless her.)

The triple is great for the really low climbing gears, which I might sometimes use on long steep rides, but this isn't my long-ride bike. The interesting discovery, which I didn't appreciate when I last had a triple, is that the 42 tooth middle ring is really not equivalent to a 39 tooth small ring. Basically, I realized that the difference between the 42 triple middle ring and 39 double small ring meant that I needed to use the small ring for more than just "granny gearing" up the steepest hills. Basically, the 42 was too hard for climbing some hills that I can climb comfortably on a 39.

So, when I next hit a +20% grade I'll probably miss the triple granny, but the other 98% of the time I'm thinking that I'll like the simpler, cleaner shifting of the double.

(As an aside, a nice thing about the CAAD5 is that it makes me really appreciate the Litespeed.)
D-A Triple has 39t middle ring. (nm)Chen2
Aug 1, 2002 11:24 AM
Is the D/A triple 39 OK with any outer ring?PdxMark
Aug 1, 2002 11:54 AM
Centaur has 30/40/50 ring combo, but then I'd lose the 52/53 outer ring in the 30/42/52 set-up. I'm hooked on Campy for this bike so D/A isn't an option, but a D/A 30/39/52 triple would be an interesting option in the future.
Is the D/A triple 39 OK with any outer ring?Chen2
Aug 1, 2002 1:17 PM
Good question, I considered the D-A triple for my wife but didn't like the 53 for her, so I put the Campy Racing T 50-40-30 on her Trek, leaving the rest of the drive train Shimano with Ultegra shifters, it works just as well as it did when it was all Ultegra, and the ratio's fit her needs better. The shift from 30t to 40t is sluggish, but it was also sluggish with the Ultegra triple, 30t to 42t. I don't like the 42 middle ring for the same reason you stated.
~Al
Will be putting 50/40/30 rings on her triple too nmPdxMark
Aug 1, 2002 2:26 PM
So how old's your stuff?Spoke Wrench
Aug 1, 2002 11:02 AM
I've got a very lightly used 2000 vintage Ultegra double that I might be willing to trade.
Specsbigdeal
Aug 1, 2002 11:06 AM
Ok, a 2002 LeMond Zurich (853 steel throughout), carbon fork w/alu steerer, Forgie oversized stem, Forgie Bar, Ultegra throughout, Thompson post (switching to carbon or Ti), Trans Am Max saddle Mag rails (switching to Terry Fly Ti), Bontrager Race Select Wheels, Conti GP3000 tires. Did I leave anything out? The bike's pretty much stock aside from the seatpost and saddle.
keep the triple, it's great !PeterRider
Aug 1, 2002 1:07 PM
just switched from double to triple (and have by the way an ultegra drivetrain to sell if you're interested)

Triple is really great. No problem with the ultegra front derailleur, I set it up in 5 minutes and it shifts no problem. Maybe I'm no real pro, but still, triple is very nice in the mountains of SoCal.

Also, don't get the DA cassette, it wears too fast.

Pierre
If you want to sell your triple components????RickC5
Aug 2, 2002 7:41 AM
I'm VERY interested & motivated.

If so, reply to this post.
look on ebay or on the classifieds of this forumPeterRider
Aug 2, 2002 8:57 AM