Chainset advise

ilovegrace
ilovegrace Posts: 677
edited March 2019 in Road buying advice
Ok . so I am a tight Yorkshire man.
I need anew chainset .
At the moment . on all my bikes I use 175.5 cranks 50x34 . I have seen a 52 x 36 175 for £65 on probike kit. Dare i go for this option . will I notice much difference . ? I do live in a hilly area and do a fair bit of climbing. (Rosedale chimney bank is not far away !!)
Thanks in anticipation of your
rreplys
ILG

Comments

  • imposter2.0
    imposter2.0 Posts: 12,028
    Do you mean 172.5?

    Also, what is wrong with your current chainset?

    The gearing difference is self-evident, but only you can decide whether you will be able to cope with it or not. The difference in crank length is negligible.
  • cougie
    cougie Posts: 22,512
    Don't use that bike for the really steep climbs ?
  • N0bodyOfTheGoat
    N0bodyOfTheGoat Posts: 6,065
    Chuck your current setup into https://www.sheldonbrown.com/gear-calc.html and then change the chainrings to 36/52 to see the gear inches difference.

    Purely going on https://www.strava.com/segments/6690945 , I'd want 34/50 chainrings and my new 11-34 for the ~23% section.

    11-speed setup?
    Shimano drivetrain?

    If so, cheapest 34/50 option I'm aware of is https://www.merlincycles.com/shimano-fc ... 09014.html (£60 before using any reward points).
    ================
    2020 Voodoo Marasa
    2017 Cube Attain GTC Pro Disc 2016
    2016 Voodoo Wazoo
  • ilovegrace
    ilovegrace Posts: 677
    Thanks for the replies
    Yes I mean 172.5 .
    It is shirmao 10 speed 28 rear mech .
    I am replacing the origonal fsa chainset that has gone onto my winter bike.
    It is the 34x 28 ratio as opposed to the 36 x 28 that concerns me .
    Think I will stick with the 34x28 and look for another chainset
    Have my eye one on e bay .used but looks.ok.
    Is their a big difference in the shirmano one fro merlin as oppsed to the 105 version ?
    Thanks again
    Ilg
  • wotnoshoeseh
    wotnoshoeseh Posts: 531
    OK I'd assume that you will need a bottom bracket also to go with your new chainset - assuming you took the BB out of your current bike to use on your winter bike.
    If you go for the Merlin one, you will need to also fit a BB. To do this you need to understand what BB your bike requires - is it BSA (threaded), Italian (also threaded) or a press fit type (BB30, PF30, BB92 etc.). You can look online to see the specs of your bike - the BB type is probably going to be listed there.

    If you don't need a BB to fit to your bike, then please advise what BB is currently in the bike that you now need the chainset for. If you don't want to change the BB out then this will determine what chainset you can use.

    HTH
  • ilovegrace
    ilovegrace Posts: 677
    wotnoshoeseh wrote:
    OK I'd assume that you will need a bottom bracket also to go with your new chainset - assuming you took the BB out of your current bike to use on your winter bike.
    If you go for the Merlin one, you will need to also fit a BB. To do this you need to understand what BB your bike requires - is it BSA (threaded), Italian (also threaded) or a press fit type (BB30, PF30, BB92 etc.). You can look online to see the specs of your bike - the BB type is probably going to be listed there.

    If you don't need a BB to fit to your bike, then please advise what BB is currently in the bike that you now need the chainset for. If you don't want to change the BB out then this will determine what chainset you can use.

    HTH
    I will be needing a new bb it is a bsa .threaded 68 mm external .i ithink.
    Tofay I have been offeted a sram red 10 speed with compact and semi compact chainrings for £50. But do not know if I can get a bb to match ?
  • Alejandrosdog
    Alejandrosdog Posts: 1,975
    Wtf is this thread another wind up?
  • imposter2.0
    imposter2.0 Posts: 12,028
    ilovegrace wrote:
    Tofay I have been offeted a sram red 10 speed with compact and semi compact chainrings for £50. But do not know if I can get a bb to match ?

    You're saying you don't know if SRAM make a compatible BB for one of their own chainsets?
  • ilovegrace
    ilovegrace Posts: 677
    Imposter wrote:
    ilovegrace wrote:
    Tofay I have been offeted a sram red 10 speed with compact and semi compact chainrings for £50. But do not know if I can get a bb to match ?

    You're saying you don't know if SRAM make a compatible BB for one of their own chainsets?
    According to the guy who is selling it . he is not sure if I can get a bb for a Sram red to fit my bike .
    Ps
    I am a joiner not a bike mechanic . any advise you need on joinrey . I am yor man . For advise on bike stuff I post on here . Fair enough ?
  • imposter2.0
    imposter2.0 Posts: 12,028
    ilovegrace wrote:
    Imposter wrote:
    ilovegrace wrote:
    Tofay I have been offeted a sram red 10 speed with compact and semi compact chainrings for £50. But do not know if I can get a bb to match ?

    You're saying you don't know if SRAM make a compatible BB for one of their own chainsets?
    According to the guy who is selling it . he is not sure if I can get a bb for a Sram red to fit my bike .
    Ps
    I am a joiner not a bike mechanic . any advise you need on joinrey . I am yor man . For advise on bike stuff I post on here . Fair enough ?

    If only you had mentioned what bike you have....
  • ilovegrace
    ilovegrace Posts: 677
    A 2013 Look 566 bsa 68mm thread external bottom bracket . it had a fsa gossamer fitted originally.
  • imposter2.0
    imposter2.0 Posts: 12,028
    ilovegrace wrote:
    A 2013 Look 566 bsa 68mm thread external bottom bracket . it had a fsa gossamer fitted originally.

    In which case, any standard threaded GXP bb will fit...
  • ilovegrace
    ilovegrace Posts: 677
    Imposter wrote:
    ilovegrace wrote:
    A 2013 Look 566 bsa 68mm thread external bottom bracket . it had a fsa gossamer fitted originally.

    In which case, any standard threaded GXP bb will fit...
    That sir is good news . very much appreciated.
    Regards
    ILG
  • paulbnix
    paulbnix Posts: 632
    I haven't noticed it mentioned earlier but you do need to check if the SRAM red chainset is BB30 or GPX.
    GPX will fit with a GPX BB and BB30 won't fit.
  • ilovegrace
    ilovegrace Posts: 677
    paulbnix wrote:
    I haven't noticed it mentioned earlier but you do need to check if the SRAM red chainset is BB30 or GPX.
    GPX will fit with a GPX BB and BB30 won't fit.
    Mmmmmmm.interesting .
    Many thanks
    ILM
  • Klaus B
    Klaus B Posts: 63
    If you're interested in crank length check this

    https://bikedynamics.co.uk/FitGuidecranks.htm
  • cycleclinic
    cycleclinic Posts: 6,865
    OP you want y=to replace the compact chainset with a semi compact and have taller gearing for the climbs?
    http://www.thecycleclinic.co.uk -wheel building and other stuff.
  • the_cyclist_of_catan
    the_cyclist_of_catan Posts: 354
    Klaus B wrote:
    If you're interested in crank length check this

    https://bikedynamics.co.uk/FitGuidecranks.htm

    It’s a total git trying to find 165mm cranks from Campagnolo.
    They use their cars as shopping baskets; they use their cars as overcoats.
  • Klaus B
    Klaus B Posts: 63
    The Cyclist of Catan wrote:
    Klaus B wrote:
    If you're interested in crank length check this

    https://bikedynamics.co.uk/FitGuidecranks.htm

    It’s a total git trying to find 165mm cranks from Campagnolo.

    Shame 'cause I wanna try 167.5 and I like Campy too. It looks so good

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