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11-23 vs. 12-25 for RR?(18 posts)

11-23 vs. 12-25 for RR?filtersweep
Jul 28, 2003 7:12 PM
50 mile road race- my waifish friend suggests it is "rollers" (I'm thinking it may be "hills"). I've never ridden the route and it is a few hours away. At least we agree it is not flat. On one hand, I can ride most rollers in the big ring... my friend suggests I'll need the 11. I'm also contemplating swapping the 12 for the 11 for an 11-25. Any thoughts? I'm leaning toward 12-25...

Observe below how carefully the yellow line rule was enforced (from last year's race... submitted for your amusement).
Here Is My Opinion...Indurain 03
Jul 28, 2003 10:44 PM
I would go with the 12-25. Personally, the 25 sprocket is a much greater asset than the 11. I think that the difference between the 11 and 12 sprockets is pretty negligible anyway.
Ciao!
re: 11-23 vs. 12-25 for RR?rogue_CT1
Jul 29, 2003 3:27 AM
I'd go 12X25 too. Having a "bail out" gear is more important to me than having the 11. Besides, being in a group that big going down hill there won't be much of a difference between a 12 and an 11.
12-25 too...Spunout
Jul 29, 2003 3:57 AM
When then course has big-ring rollers, you can ride 53-23 (or 25, anything goes in a race) without doing any shifts on the front. Lowers your risk of throwing chains.

Also, if you aren't pro/cat1, you have a better chainline to your 15-16-17 on the 12-25 than an 11-23.

Let us know if you spin out your 11 in the sprint!
Maybe downhill...filtersweep
Jul 29, 2003 5:16 AM
I don't think I'll spin out the 11 on the flats- besides, there is a nasty city corner two blocks from the finish... but I think my approach will be to fly down the rollers as fast as possible to give me more momentum over the top- provided there is any room to ride ;)

The ironic thing is, the three guys I usually ride with gave me no end of grief when I added the 12-25- after a few hill rides they all have them.
Lord knows what gears I actually use in a race, but I've neverbill
Jul 29, 2003 7:43 AM
felt that the 12-25 was letting me down in any way. I suppose that I've come close to spinning out the 12, but close is close, it's not spinning out.
11-23Pack Meat
Jul 29, 2003 11:42 AM
If you're in a 25 in a rolling road race you're not racing anymore. If there is any chance in spinning out use the 11. It will help keep your cadence reasonable when everybody else is spinning their butts off at 130.
I agree with that, I'm just not much at risk of using the 11.bill
Jul 29, 2003 2:53 PM
I'm doing the Cat 4 race in Altoona, this weekend, though, and I suspect I'll be grateful for the 25 here and there. With rollers, I agree -- I probably rarely use anything less than a 21 on the usual group ride over rollers.
I agree as well.No_sprint
Jul 30, 2003 8:07 AM
If you're going to need a 25 to go uphill, you're going to need the 11 going down.

My race tubies are 11-23.
altoonaDuane Gran
Aug 1, 2003 8:11 AM
If the road race course is the same as the one I did two years ago, you will want the 25. If they go up the mountain, it hits some seriously steep sections on a 3 mile climb.
The 11 is not for downhillsMR_GRUMPY
Jul 29, 2003 1:27 PM
If your sprints end up at over 43 mph use the 11. If they end up 38-42 mph, use a 12.
Says who?! ;)filtersweep
Jul 29, 2003 2:41 PM
You may have missed my humor- I'm not spinning out on a 12 on the flats... unless I'm completely sucked along with a gale for a tailwind. I'm not looking to win anything- but rather to finish in under 2 hours so at least next year I can receive a preferred starting position. My plan is to simply gut it out (do they really need two feed zones?) and experience a race with this many riders in one field.

Regarding the other post from Pack Meat- I was thinking more about staying in the big ring for most/all the ride as others have mentioned... the little ring and 25 is for climbing walls. The 12-25 is a bit like a Swiss Army knife...
not for downhills?DougSloan
Jul 29, 2003 4:17 PM
We who suck at climbing fall behind on the climb and have to power our way back to the group on the next descent. An 11 is very handy for that. I've done so thousands of times.

Doug
Once you get over 40 mphMR_GRUMPY
Jul 29, 2003 7:31 PM
You can always go faster by getting into an aero tuck. Once you are into your tuck, you will fly by people who are pedaling like crazy. The only time I can see a use for an 11, is when the finish is right after a downhill, and the wind-up starts at 40 mph, or if the finish is on a five mile straight with a 25 mph tailwind.
not my experienceDougSloan
Jul 30, 2003 11:49 AM
I've pedaled up to over 55 mph, faster than I have coasted on the same hills. Depends on the hill and how fast you want to accellerate to top speed.

Doug
Agreedshirt
Jul 31, 2003 8:57 AM
That 11 is nice for long descents (not necessarily steep) when you're soft pedaling in the group. Coasting won't allow you to keep up, and I have no desire to soft pedal at 110 rpms...
re: 11-23 vs. 12-25 for RR?Matt Britter
Jul 29, 2003 2:01 PM
I agree w/ Spunout,for me the 12-25 gives a better option in the 53. Less cross chain when powering over rollers.
-mb
12-25 is my votechar
Aug 1, 2003 8:42 PM
filter:

Reason being is the [up] hills you want to remain in the "Big Ring" so assuming a 52 or 53 chainring, this would be more appropriate, you would shift to a, say, 53x23 up the hill and not fumble around with the front derailleur shifting. This is a technique that I have been taught on uphill courses, have a cog lower than what you need so you can use the Big Chainring. As far as the 11, you don't need it [if you have a 53], just work on the leg speed.

Burn with a Turn
:Char