Anything lower than 39 for DA chainring?

"BG" <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

I have a 9-speed DA and would like to get some added spin for really steep climbs. I don't
want to go to a racing triple--too expensive. I was thinking I could get what I want with a
smaller chainring. Good idea / bad idea? If this isn't viable, what are the in-/less-expensive
options. Thanks.

DA double crank has a 130mm bcd, the smallest chainring you can get is a
38t. If that's not enough and you want to keep a double crank, you'll need to get a double crank
with a 110mm bcd. TA, Ritchey, and FSA offer double cranks with 110bcd. For more, check out:
www.rivbike.com for ritchey double www.peterwhitecycles.com for TA double www.fsa.com for FSA
carbon double crank

BG said:

I have a 9-speed DA and would like to get some added spin for really steep climbs. I don't want to
go to a racing triple--too expensive. I was thinking I could get what I want with a smaller
chainring. Good idea / bad idea? If this isn't viable, what are the in-/less-expensive options.

The smallest chainring that will fit is 38 teeth, only a 2 1/2% difference.

If you go to something bigger in back, it will make a much larger difference. F'rinstance, going
from a 27 to a 30 is an 11% difference.

30 is about the biggest that will work without changing the rear derailer.

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In article said:

I have a 9-speed DA and would like to get some added spin for really steep climbs. I don't want to
go to a racing triple--too expensive. I was thinking I could get what I want with a smaller
chainring. Good idea / bad idea? If this isn't viable, what are the in-/less-expensive options.

There is a 38-tooth ring and the Sugino ones are the best deal in my opinion, just a basic aluminum
chainring. They won't work with all 130 BCD crank arms but should be fine with DA.

bgreene-<< I have a 9-speed DA and would like to get some added spin for really steep climbs.

Quoted message said:

Quoted message said:

<BR><BR>

38t is the smallest. May want to invest in a 'mtb' esque cogset(12-30) and a long cage rear der-

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bfd said:

DA double crank has a 130mm bcd, the smallest chainring you can get is a
38t. If that's not enough and you want to keep a double crank, you'll need to get a double crank
with a 110mm bcd. TA, Ritchey, and FSA offer double cranks with 110bcd. For more, check out:
www.rivbike.com for ritchey double www.peterwhitecycles.com for TA double www.fsa.com for FSA
carbon double crank

Stronglight also has a beautiful, qualtiy, 110 double. Dimension Cross is a less expensive
alternative and I have several sets of those for sale. You can also find high quality 110 BCD triple
crank arms at very low prices and just size the BB 5-6 mm shorter and use the 2 outer rings.

I don't know that any of the units mentioned will work on an Octalink bb.

Thanks, everyone, for your input. Very helpful.

BG said:

I have a 9-speed DA and would like to get some added spin for really steep climbs. I don't
want to go to a racing triple--too expensive. I was thinking I could get what I want with a
smaller chainring. Good idea / bad idea? If this isn't viable, what are the in-/less-expensive
options. Thanks.

BG said:

I have a 9-speed DA and would like to get some added spin for really steep climbs. I don't
want to go to a racing triple--too expensive. I was thinking I could get what I want with a
smaller chainring. Good idea / bad idea? If this isn't viable, what are the in-/less-expensive
options. Thanks.

As others have pointed out, you are limited to a 38t inner ring with the 130 BCD. I used to combine
a 38t with a 22t rear cog to get a 7% lower gear back in my 8sp days (change a <53-39>x<12 13 14 15
16 17 19 21> to <52-38>x<12 13 14 15 16 17 19 22>😉. This change didn't disrupt the basic gearing
pattern, it mostly "stretched" the last step a bit further. The same game can be played with 9sp if
you are willing to customize the cassette. For example, change a <53-39>x<12 13 14 15 16 17 19 21
23> to something like a <52-38>x<12 13 14 15 16 17 19 22 26> (you don't really have to change the
outer ring). That's nearly 14% lower (about two gears from the corncob perspective), with the same
basic pattern. The last two steps are obviously bigger.

There are some standard cassettes with more total range, and maybe look at those -- that is the most
straightforward (and cheapest) approach to obtaining lower gears. I don't neccesarily like the
standard choices because I have my own philosphy about how gears should be spaced. (There is no
"right" answer when a compromise must be made somewhere -- the right answer is a personal choice.)
Some of my custom cassette "stretches" are: <12 13 14 15 16 18 20 23 26> <12 13 14 15 16 18 21 24
28> <13 14 15 16 17 19 21 24 28>

Choose depending on your pocketbook, desired step size at various points, the low you want, and the
high you want.

Full Speed Ahead and Vuelta both make a 38 tooth chainring for 130 bolt pattern. Something else to
consider is an 12-28 cogset. I make a custom version that runs $45.

Good luck!

Tom

--
Bruni Bicycles "Where art meets science" brunibicycles.com
410.426.3420 BG <[email hidden]> wrote in message "]news:[email hidden]...

Quoted message said:

I have a 9-speed DA and would like to get some added spin for really steep climbs. I don't
want to go to a racing triple--too expensive. I was thinking I could get what I want with a
smaller chainring. Good idea / bad idea? If this isn't viable, what are the in-/less-expensive
options. Thanks.