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gearing question how low can i go ?

mountainpenguinmountainpenguin Posts: 37
edited February 2018 in Commuting chat
Ok so new shiny bike but gearing is way to high for its duties / my fitness.
Duties commuting and towing toddler up hills.
current gearing is 11-28 with a 54:36 up front with a ultegra short cage
I would like to keep things as light and as cheap as possible.
I gather i can buy
https://www.sjscycles.co.uk/gear-spares/shimano-ultegra-rd6800-inner-plate-gs-type-y5yc25000/ and
https://www.sjscycles.co.uk/gear-spares/shimano-ultegra-rd6800-outer-plate-plate-stopper-pin-gs-type-y5yc98080/
to convert to a log cage.
Officially this would allow a 11-32 on the rear. unofficially how big could this get ?
could I get a 1170 11 - 36 on ?
and swap the front chainrings
or would a simpler approach be:

1. Install cassette of choice. Must be 11t high gear or it won't fit hub driver. SRAM PG-1130NX is light for 11-42
2. Install Shimano 11 spd MTB derailleur. If only going to 42 tooth rear and 1X in front can use medium cage. XT RD-M8000.
3. Install Wolf Tooth Components Tanpan SH11 This makes road bike shifter play nice with mtb derailleur. Do not need online adapter. Shorten rear cable casing. Longer rear cable needed but will usually be included with new derailleur.

and would there be any benefit to swapping the front chain rings or is 42:34 just too low ?

Posts

  • XT and Tanpan is what I did, just posted about it on the fettling group earlier today actually... Works a treat for me :D

    I went for the 11-36 SRAM cassette though as I wanted the smaller jumps and feel like it's still enough range (on a 44t chainring)
  • If cheap as possible is your aim

    Buy a 105 11-32 cassette and a set of compact chainrings to 50/34

    If you want to save cash you can keep a short cage rear mech on but just remember to swap down in the middle before you run to its limit. A short cage can handle 34 front 32 Rear no problem but on the big ring it won’t have room .
  • thats looks like a tanpan is the way to go :)
    Am i correct in a xt 10 speed can be used with an 11 speed sti shifter ?
  • thats looks like a tanpan is the way to go :)
    Am i correct in a xt 10 speed can be used with an 11 speed sti shifter ?


    I'm not too sure, do you mean with an 11 speed cassette? Could be possible although you may have to sacrifice a sprocket if not
  • inbikeinbike Posts: 264
    Doing a lot of off-roading this year, and considering swapping my 11-32 for an 11-34.

    I've got a Ultegra GS RD so I'm sure it'll fit.

    Has anyone tried it? Seems like a better compromise than fitting an 11-36 or 11-40 and a roadlink.
  • 1. Sell the bike.

    2. Buy this 11-50 bad boy: http://www.chainreactioncycles.com/sram ... 7C492725UK

    3. Build a new bike around it

    4. Ride up tree trunks.
    Swim. Bike. Run. Yeah. That's what I used to do.

    Bike 1
    Bike 2-A
  • 1. Sell the bike.

    2. Buy this 11-50 bad boy: http://www.chainreactioncycles.com/sram ... 7C492725UK

    3. Build a new bike around it

    4. Ride up tree trunks.

    That has the benefit that you can use it as a colandar when touring.
  • elbowlohelbowloh Posts: 2,221
    1. Sell the bike.

    2. Buy this 11-50 bad boy: http://www.chainreactioncycles.com/sram ... 7C492725UK

    3. Build a new bike around it

    4. Ride up tree trunks.
    It's called an 1150, but in the details it actually says it's a 10-42T!

    That's just confusing.
    Felt F1 2014
    Felt Z6 2012
    Red Arthur Caygill steel frame ??
    Tall....
  • elbowloh wrote:
    1. Sell the bike.

    2. Buy this 11-50 bad boy: http://www.chainreactioncycles.com/sram ... 7C492725UK

    3. Build a new bike around it

    4. Ride up tree trunks.
    It's called an 1150, but in the details it actually says it's a 10-42T!

    That's just confusing.

    Ah. Will sir be requiring one of these, then?

    http://www.sunrace.com/en/products/detail/csmx80

    THV046627.jpg

    Excellent choice, sir. Excellent.
    Swim. Bike. Run. Yeah. That's what I used to do.

    Bike 1
    Bike 2-A
  • elbowlohelbowloh Posts: 2,221
    Ah. Will sir be requiring one of these, then?


    Excellent choice, sir. Excellent.
    Can also be used as a parasol when removed from the bike.
    Felt F1 2014
    Felt Z6 2012
    Red Arthur Caygill steel frame ??
    Tall....
  • hmm maybe a bit extreme !
    will update after fettling. I have gone for a tanpan and 11-40 from decathlon in the sale.
    More than I wanted but will definitely give the range.
    an 50t to 36t would be a ratio of 0.7 so 100 rpm thats just over 8km/h (5km/h) is walking speed !
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