Groupset advice

garryangus
garryangus Posts: 17
edited January 2010 in Road buying advice
Guys,

I have a Trek 5000 Triple with a Bontrager Select crankset which is in the process of failing :o

Now i want to upgrade to at least an ultegra but i am not sure whether to go away from the triple.

The current set up is:

Crankset: Bontrager Select Triple ring
Front deraileur: Ultegra triple
Rear deraileur: Ultegra
Shifters: 105's

The rear cog set up is different to my other bike (assume this is due to the triple ring) it there is a longer gap between the 2 rear cogs (if that makes sense)

Now my question is:

If i want to change to a double ring, what do i need to change?

Obviously the Front deraileur
rear cogs?
chain?
shifters?


Or is it better just to get an Ultegra triple crankset?

cheers and hope all that made some sense

Road: Trek 5000
TT: Planet X Pro stealth Carbon

Comments

  • Brindy
    Brindy Posts: 45
    i would say its best to a compact instead of a triple with that you need:

    Different front mech shifter which is probs cheaper than buying a triple
  • JamesB
    JamesB Posts: 1,184
    2 for compact; probably be OK with existing front mech as can just screw in the smallest stop to limt to a double shift only---and depending on wear of chain and cogs you may need to change those too as a new chainset / very worn chain (if it is) won`t run too well; if changing cogs almost certainly need new chain, unless <500 miles use.
  • tonye_n
    tonye_n Posts: 832
    Shim 105 (5600) LH shifter will work with double/triple.

    If you go for a double, I would also suggest compact chainset to give you the range of gearing that you would be used to having on a triple(for hill climbing and whatnot).

    To get accurate and reliable shifting you are better off getting a doulbe-specific front mech.

    You will need to change the rear cog to one with a wider range. Say 12-27 instead of the 12-25 that usually comes with a triple setup.

    Of course the chain will need to be either adjusted, or better still changed.
  • garryangus
    garryangus Posts: 17
    Thanks guys,

    I ended up getting a good deal on an ultegra SL triple crankset with BB.

    That way i dont need to swap out any other components.

    I am thinking though as the bontrager crankset was not running true, it may have caused some wear and tear on my chain, so ill replace the chain also.

    Stupid question, but i assume i need a specific one for a triple?

    Road: Trek 5000
    TT: Planet X Pro stealth Carbon

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