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Triple Chain rings / Double(8 posts)

Triple Chain rings / DoubleBill R.
Jul 24, 2001 6:30 PM
I recently purchased a Trek 5200 I told the dealer that I wanted a double chain ring model he told me that the only one that was in stock at Trek was a triple chain ring model. I stressed I really wanted a double chain ring model he said he would check around and what he did is ordered the Triple model and told me he could make it a double when it arrived at his store. When I picked it up sure enough it was a double, but he told me the front shifter was a triple shifter so I would have better control over shifting.

Then I started riding the bike and it seems it is hard to find gears without rubbing on the front shifter. Then I did some looking around and found out that the rear is a triple shift model also and this got me worried. Then there seem to be a big empty space where the third gear used to be on the front crank.

I really don't want to pay $2700 for a bike that is not what I wanted, what do you recommend I should do. I feel like I have been misled and have spent my life savings on a dream bike, which has turned out to be a bike that has been monkey rigged to a quick sell. I have not contacted the dealer yet about this situation can you help me in this matter. What should I do??? Can double chain rings work with a triple shifters correctly???
re: Triple Chain rings / DoubleLC
Jul 24, 2001 8:11 PM
What component group is on the bike?

I will assume Ultegra. What is the model number on the back of the right crankarm? 6500 or 6503?

9 speed Ultegra shifters are all designed for both double and triple.
re: Triple Chain rings / DoubleCrash
Jul 24, 2001 9:30 PM
Bill, I'm not the most mechanically inclined guy here, but it sounds like he just swapped out the triple crank with a double. Especially if the chainrings are the usual 53-39. There is a different bottom bracket for the double / triple (I believe the triple is wider), if he didn't switch the BB that could explain for the spacing. I don't think it should make any difference in the operation of your bike.
As someone else said I think the shifters / derailers shouldn't be a problem. You probably just need a simple adjustment.
Besides that, how do you like your 5200 ? I ended up going with an Cannondale R2000si, but I really liked the 5200 as well. It's a wonderful bike that most people would kill for. Have your LBS adjust your shifting then go out riding !!!
re: Triple Chain rings / DoubleDrD
Jul 25, 2001 3:09 AM
So as far as the STI shift levers go, you are fine - the levers work with either a double or a triple (there are no double or triple specific Ultegra shifters)

The deraileurs will be fine as well - the front has a different shaped cage, but should work. The rear has a longer cage (to allow for the larger tooth difference up front - you need to have enough chain to work on the big chainring, as well as be able to take up the slack when you are on the granny - a short cage rear wouldn't be able to do that)

The one thing which it sounds like was not swapped out is the bottom bracket - the double requires a shorter spindle length - without doing that, the chainline is off, and your shifting ability might be degraded (plus, the chain is at a sharper angle than it needs to be - this is probably the source of your chain rub in certain gear combinations)

If you paid $2700 for the bike, and they said they would make it a double, I don't think it's unreasonable to expect that at the very least the crankset and BB were swapped out (I would ask for the deraileurs as well, but with the rear, that could be a hard sell, as the current one will work fine)... you bought an expensive bike - thety shouldn't be cutting corners.
I'd be on their doorstep tomorrowRetro
Jul 26, 2001 8:03 AM
I agree it's probably just a bb spindle swap--it won't cost them more than a few dollars and a few minutes' work. For a bike that expensive, though, I'd be on their doorstep with a bullhorn tomorrow morning, and I wouldn't go away until I was satisfied. That kind of crap is one reason more and more people are buying online. If you're not going to get service anyway, you might as well save a few dollars.
re: Sucker ??Rusty Coggs
Jul 25, 2001 9:34 AM
HFC.....no personal diaparagement meant,but do you have "SUCKER" tattoed on your forehead?? That must be what the dealer takes you for to try to pawn a sorrid mess off on you like he did. At the very least, all he did was remove the granny ring and adjust the low limit screw to block the shift to the granny. You can tell if the Crank is a triple by looking for the threaded studs that the granny attaches to. To do it right,to get the precision and weight saving and to get what you really paid for , the Crank,BB, fD and Rd should have been changed out and the shifters readjusted to give optimum shifting and trim positions with the double. The shifters do however work with a double or triple. IMHO, what the dealer did was unethical, and he will possibly find other ways to screw you if you continue doing business there.
$2,700 is too much to pay and not get what you want.Spoke Wrench
Jul 30, 2001 6:47 AM
Crankset, bottom bracket, front derailleur, rear derailleur and a shorter chain are all required to make a proper double out of a triple. Anything less is not giving you the bike that you paid for.

It looks to me like you paid full retail price for the bike. You deserve the exact bike that you paid for and nothing less.
re: Triple Chain rings / DoubleBill R
Aug 5, 2001 12:47 PM
I called the dealer and talked to him about the problem, he said bring it on in what ever you want done to meet your satisfaction. So he swapped out the Bottom Bracket for a double type now it looks good and runs good. (Took him about 20 minutes)

Ride on,
Good to have purchased from a local store and not the internet.