8 speed Sora

Sewinman
Sewinman Posts: 2,131
edited May 2009 in Commuting chat
I have Shimano 8 speed Sora gearing with two rings at the front. I was wondering if there would be occasions when this was not enough gears...or does it cover the full spectrum but just with fewer gear inbetween?

Sorry - my conceptial understanding of gearing is zero. :oops:

Comments

  • biondino
    biondino Posts: 5,990
    You are basically right, though it depends on your cassette you could have 11-32 in 8 speed or 12-23 in 10 speed, the former giving you a much wider range but also much bigger gaps between each. My 10-speed cassette is 12-27 which pretty much covers all eventualities when combined with compact chainrings.
    My Focus / My Bob Jackson
    Blog (incl. bikes)
  • sarajoy
    sarajoy Posts: 1,675
    What size are the two rings?

    Mine's a triple (28/38/48 IIRC) but I'm increasingly finding that I'm not needing to use the lowest-geared (smallest, right?) ring.

    This be hilly Brizzle. Though I daresay I'd miss it when hitting a steep hill with a headwind and after a tiring leg of a journey anyway. I'll let you know as that's looking likely to happen on my way home tonight....!

    (Edit, mine's 8-speed, 12-25 I think)
    4537512329_a78cc710e6_o.gif4537512331_ec1ef42fea_o.gif
  • Sewinman
    Sewinman Posts: 2,131
    I will have a look at the cassete and rings. I have no idea what they are other than Sora 8 speed. :oops: Thanks.
  • _Brun_
    _Brun_ Posts: 1,740
    What Blondie said is true but only applies to the cassette, not the chain rings.

    I think it's generally true that a triple chainset is the same as (or similar to) a double, but for the addition of a smaller 'granny' ring.
  • DonDaddyD
    DonDaddyD Posts: 12,689
    Though my triple/12-27 8 speed Giant may cover most gear inches combined, the gearing in any one ring is often frustrating.

    The first three (big) cogs on the rear cassette are often too easy. Then the jump from 3rd to 4th cog/ring/whatever tends to be too big a jump and takes a while to get comfortable.

    I think its something like 27-25-23-19-17-15-13-12. My triple is a 52/39/30 (or perhaps a 34 I forget).
    Food Chain number = 4

    A true scalp is not only overtaking someone but leaving them stopped at a set of lights. As you, who have clearly beaten the lights, pummels nothing but the open air ahead. ~ 'DondaddyD'. Player of the Unspoken Game
  • itboffin
    itboffin Posts: 20,064
    Tiz true that some 8 speed cassette jump wildly across the range so selection should be done carefully, I used an 11-30t MTB cassette with a very nice spread until you reach the silly BIG rings then the jump is large enough to actually be of some help, I removed this yesterday in favor of a slightly smaller campag range because it match the rest of the groupset.

    Shame it doesn't come in black :D
    Rule #5 // Harden The Feck Up.
    Rule #9 // If you are out riding in bad weather, it means you are a badass. Period.
    Rule #12 // The correct number of bikes to own is n+1.
    Rule #42 // A bike race shall never be preceded with a swim and/or followed by a run.

Categories