Oct 22, 2001 7:45 AM
|I have just purchased a new Specialized Elite bike from my LBS. I want to swap out the triple chainring setup for a double. Has anyone ever done this with their LBS and how much should I expect to pay for them to do this, seeing as it will propably have to be the chainring, cassette and shifters?
Oct 22, 2001 7:51 AM
|Why not just take of the inner ring (and get a larger big ring if it's an issue), and adjust the travel on your front shifter - no need for new shifters and casette?|
Oct 22, 2001 8:37 AM
|what a lame solution!|
Oct 22, 2001 8:53 AM
|Glad you are getting the typing - now go back to work and see if anyone else wants fries with their order..|
|re: Swapping components||TJeanloz|
Oct 22, 2001 8:08 AM
|It would have been pretty easy to negotiate this at the time of purchase. Most swapping goes the other way, double to triple, so shops have all kinds of double parts lying around and love to trade them for triple parts. If everything is still in new condition, I'd try to trade them even. If everything has been used (200+ miles) it's up for negotiation.|
|Why don't you want the triple? nm.||javagenki|
Oct 22, 2001 9:18 AM
|Why don't you want the triple? nm.||Rory|
Oct 22, 2001 10:25 AM
|I do not like the gearing ratio with a triple. On certain hills I climb, I am forced to drop into my smallest chainring and just feels too much like I am spinning my mountain bike. With the double, I seem to get into a much better rhythm, with a bigger chainring up front.|
Oct 22, 2001 11:22 AM
|I've never had a triple and am thinking about getting a new bike in the spring. Like you, I just get in a rhythm and go with what I've got. I do a lot of organized mountain rides here in Oregon/Washington, which is hilarious as I am 255lbs. I get serious double takes at the rest stops from the "real" mountain climber types. It's like, "what are you doing here?" I'm waiting for one of them to ask out loud, so I can say, "keeping up with you" but it's never happened yet. Oh well, I'm ready anyway. It just seems that if I can do 10,000 feet in a day on a double, anybody can.
Anyway, I was talking to some of the racers in the area (cat. 2 and 3). I was surprised to find that some of them had triples on the bikes they use in the mountains here. Does that seem strange to anyone else, or is the triple something "real" mountain riders might consider useful?
|Viva la triple||jtolleson|
Oct 22, 2001 11:38 AM
|IMHO, most folks who want to dump their triple get caught up in what others will think (looking Freddish). If you do the math, you can achieve the gear ratios you want without converting to a double, and can always avoid the overspin by shifting up.
Here in Colorado, triples are popular, even with strong and/or experienced riders. It is one thing to climb a 10% grade for 5 miles based on brute strength; it is another to climb 18 miles at that grade (Independence Pass) or 12 miles at that grade followed by a 15% finish (Left Hand Canyon) or to combine distance, altitude, and two vertical miles of climbing (Triple Bypass).
Yes, there are racers/strong rec. riders who do all of the above on doubles in Colorado, and they do 'em lots faster than I do. But plenty of strong and experienced riders (I consider myself one) enjoy the recovery offered by a triple for riding mountain passes. In my book, there's no shame in being good to one's knees, quads, and lungs when pushing to climb harder routes.
|Viva la triple||Rory|
Oct 22, 2001 11:47 AM
|Jt, I also live in Colorado and I also consider myself a strong climber, (Race expert MTB) and it is not because of shame that I want to dump the triple as I could care less.
I found last season, I was doing all my hard hill interval climbs on my Mountain bike, because I could get onto my middle chainring and get a better grind going. Seemed as though I could maintain a faster pace on my 34 chainring up front, vs a 30 on my road bike.
Oct 22, 2001 1:51 PM
|because the middle chain ring on most triples is a 42 (compared to a 39 smaller cog on a double). I would think that would give you all the grinding you want. Mathmatically, if you multiply the gear ratios, you can generally still match what you want by using different combos on the triple.
I appreciate your rationale, but I do sense that some folks want to dump the triple 'cause it ain't cool enough. And that I think is a shame.
Oct 22, 2001 2:23 PM
|thats exactly my problem, the 42 is just too big for me to stay in, so Im forced down to the 30, but a 39 works out just fine. As you can see, it is a big jump down to a 30 and yes, maybe it is psychological, I dont know, but it sure seems as though my momentum just isnt the same.
Ive also been told that it is better to be in as big as a chainring up front, as you can ride, and to be in a low gear on your cassette, than to be in a smaller chainring up front and a higher gear on your cassette. I believe this is due to being able to generate more power with the bigger chainring.
Oct 23, 2001 4:43 AM
|i have a triple and i wanna dump it as well. why?
i think i hate that extra shift i have to make. it doesn't really cost me anything, but it is irksome.
|I did it and I regreted it..||vanzutas|
Oct 22, 2001 9:42 AM
|When my girlfriend bought her bike from the bike shop it had a triple on it. I thought triples were pointless, I have always ridden with a double. I had them swap out all of the parts and make it a double. they did it for no cost, and did not seem to be pissed about it at all. it seemed standard.
After it was done I asked myself why I wanted it done and I realized it was all about style. I wish I had just left it alone.
She has since moved to an incredibly flat area and I am a little more happy that the switch was made but there was still no reason for it.
|re: Swapping components||Chen2|
Oct 22, 2001 10:40 AM
|You didn't say what components are on the bike now, but if Shimano 105 or Ultegra, you'll need to change the complete crank set, bottom bracket, front derailleur, and rear derailleur, and shorten the chain. The shifters and rear cassette won't need changing. Actually the triple's rear derailleur would work but is longer and heavier than needed.
|re: Swapping components||Rory|
Oct 22, 2001 11:38 AM
|It has 105 components, but wouldnt I need to change the shifters as they are now made to cater for 3 shifts on the crankset vs 2 shifts for a double?|
|re: Swapping components||Chen2|
Oct 22, 2001 1:27 PM
|Sorry, can't say for sure as to the 105 shifter. With the Ultegra shifter, it's the same for either a double or a triple. It has two trim stops, the left for aligning the chain with the left half of the cassette and the right for aligning the chain with the right half of the cassette. As for the 105, maybe someone else here can say for sure, suggest you ask the LBS. I question the need for trim stops on the front shifter, you surely do not need them for a double.
|re: Swapping components||cioccman|
Oct 22, 2001 11:42 AM
|Al above has got it right. If you want to do it the *righteous* way, you'll need to do a lot. You'll need to do the bottom bracket and much more stuff. The optimal chain line changes with the width of the bottom bracket spindle. The center space between the two front crainrings becomes the optimal centerline in which to line the front cranks and rings up. This is different than with a triple where the center front chainring is the centerline to which the chain is lined up with. You will notice that the bottom brackets sold with triples are differnent than the doubles. Reason is the spindle width.
I see no reason to do it now that you've got the triple. Just don't use it if you don't want to.