Thanks for all the information..
To answer Bills' question , I'm really just trying to maximize range while
keeping the quasi-single chainring up front. I believe I could achieve
what I need with just getting a smaller chainring but I do find myself in
the 40/12 often and I don't want to totally give up on a high gear.
The advice to look at % difference between jumps in gear-inches is helpful.
I'm now leaning towards a 10 speed Sunrace 11-40 and keeping all shifting
pieces ..just means I'lll need to keep it friction.
I do live in a somewhat mountainous region *(I know the Catskills are more
like hills to some of you*) and load my bike up pretty often ...and I also
know that I can achieve what I need with a triple which I've been happy
with all these years. I'm just excited to figure out a system where I have
a wide low double in the front without a front-derailleur where I'm in the
Middle position of a 110/74 triple crankset 90% of the time and have a wide
gearing range in the back that will keep me moving *most* of the time.
On Thursday, April 5, 2018 at 9:25:50 PM UTC-4, dougP wrote:
> "I'll bet you mean 12-14-16-18-21-24-28-32."
> You win that bet. Thanks for correction. Foiled again by fumbling fat
> On Thursday, April 5, 2018 at 2:01:39 PM UTC-7, Steve Palincsar wrote:
>> On 04/05/2018 12:38 PM, dougP wrote:
>> > "I does make me curious what others may think is the ideal spacing
>> > between cogs when climbing and shifting down while attempting to
>> > maintain a somewhat constant cadence."
>> That sure depends a lot on the terrain, how much and how fast it
>> changes, and how much you and your load weigh. I like 1-tooth
>> differences up at the top end, 2-tooth in the middle going to 3 for the
>> last few on most of my bikes, but there are a couple that seem happier
>> with spacing more like
>> > I've never run more than 8 (and always a triple), so pretty far behind
>> > current thinking. For general use & touring, 2 tooth jumps between
>> > the smallest cogs, going to 3 in the middle & 4 for the last couple
>> > shifts well and doesn't feel like stepping into a hole.
>> > 12-14-26-28-21-24-28-32 (or 34) meets my needs.
>> I'll bet you mean 12-14-16-18-21-24-28-32. I have a customized version
>> of that cassette (substituting a 1st position 13 for the 12) on my Jack
>> Taylor, where it works very nicely.
>> > I was cautious about the 28 to 34 being too big but it shifts well and
>> > actually feels like a good change. Sometimes the 28 to 32 doesn't
>> > feel like much of a change. Chainrings are 24-34-44, with 700 x 40
>> > tires.
>> It feels fine to me, but then most of mine have 3-tooth steps at the low
>> gear end. And, as it happens, 36x32 is just fine for most of the steep
>> terrain where I ride. I have a 24T granny ring, but only get to use it
>> maybe once a month or so.
>> Steve Palincsar
>> Alexandria, Virginia
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