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Non-compact Shimano 105 chainset, smallest inner ring?

(9 posts)
  • Started 13 years ago by Smudge
  • Latest reply from kaputnik
  • This topic is resolved
  • poll: Should I get a teeny inner ring?
    yes it will help. : (0 votes)
    Nope you, need to buy a compact, anything smaller that fits is not enough to make a difference. : (1 votes)
    50 %
    No, grizz it out and stop being weak. : (1 votes)
    50 %

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  1. Smudge
    Member

    Ok, I have a 52/38 on the front of my roadbike, and being weak and old I find that combined with a close ratio rear cassette can be kind of hard work after a few steep hills... given I'll be trekking down the A68 in a few weeks I wonder if anyone knows what the smallest inner ring is that'll fit on a Shimano 105 chainset?
    Or where the best deal is on a compact!
    Ta... :)

    Posted 13 years ago #
  2. chdot
    Admin

    Why not put a wider ratio cassette on?

    Posted 13 years ago #
  3. Smudge
    Member

    'cause if a small front ring will go on it's probably cheaper? Fair point though!

    Posted 13 years ago #
  4. chdot
    Admin

    This might interest -

    http://www.sheldonbrown.com/cribsheet-bcd.html

    Posted 13 years ago #
  5. kaputnik
    Moderator

    I've asked this question in TBW before as I have the same crankset. Answer is you "can" just about squeeze a 37 on, but not less than that.

    I think the cassette is your best option, but you might be limited there if you have a short reach dérailleur.

    Posted 13 years ago #
  6. chdot
    Admin

    "you might be limited there if you have a short reach dérailleur"

    Yes, the 105 I've got will handle a 28T - but there have been many models over the years...

    Posted 13 years ago #
  7. gembo
    Member

    Of no use but slightly related- new Specialized Secteur has a SRAM chainset with what looks like big cog and then granny on the front (no middle cog) 34/50 chain ring and 11-32 cassette.

    http://www.edinburghbicycle.com/ebwPNLqrymode.a4p?f_ProductID=12987&f_SupersetQRY=C438&f_SortOrderID=1&f_bct=c003155c018341

    The SRAM chainset’s lower Q-factor (distance between the outside of the pedal holes) positions your feet closer together than would be possible with a triple chainset - the alternative route to wide-range gearing. A lower Q factor is reckoned to contribute to optimal pedalling and biomechanical efficiency. A lower Q factor is reckoned to contribute to optimal pedalling and biomechanical efficiency [so true they said it twice]. Low Q-factor was what motivated Specialized-sponsored rider Graeme Obree to famously raid his washing machine for low-profile bearings to create a shorter bottom bracket axle to minimize the distance between the cranks when building his hour record-breaking bike.

    Posted 13 years ago #
  8. Smudge
    Member

    Looks like the solitary voter is right, simplest just to get some awsomepower and push the biggish gear lol :))

    Posted 13 years ago #
  9. kaputnik
    Moderator

    Looks like the solitary voter is right

    Of course I am :D

    Speaking of Obree's "Old Faithful", it was on Cycling Weekly yesterday that an enterprising Swede has built an updated replica out of wood and carbon (Obree's was steel and aluminium)

    His quest to get his knees ever-closer together was also why he used a cruciform frame design, so that there was no top tube to get in the way of his knees.

    Personally I think the replica isn't a pretty sight. It's worth going to the top floor of the museum on Chambers Street to see the original. It still has a shoe bolted on to it.

    Posted 13 years ago #

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