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best compact double for crit racing?

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best compact double for crit racing?

Old 04-16-09, 09:34 AM
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best compact double for crit racing?

Just wondering... what is the best double crankset for crit racing?

I'm looking for lowest price + stiffness.
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Old 04-16-09, 09:35 AM
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Shimano R700
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Old 04-16-09, 09:42 AM
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Originally Posted by bdcheung View Post
Shimano R700
Thanks.
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Old 04-16-09, 10:20 AM
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Make sure you get an 11-21 cassette
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Old 04-16-09, 11:16 AM
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Originally Posted by fordfasterr View Post
Just wondering... what is the best double crankset for crit racing?

I'm looking for lowest price + stiffness.

Best compact double for crit racing, particularly in South Florida is an oxymoron.

Admittedly 50x11 is a big enough gear for just about any mortal.

However if the stated purpose is crit racing, you certainly don't need a compact, particularly in Florida.
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Old 04-16-09, 11:20 AM
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Originally Posted by bdcheung View Post
Shimano R700
+1

Whether you need a compact or not is a different story.
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Old 04-16-09, 11:28 AM
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Originally Posted by merlinextraligh View Post
Best compact double for crit racing, particularly in South Florida is an oxymoron.

Admittedly 50x11 is a big enough gear for just about any mortal.

However if the stated purpose is crit racing, you certainly don't need a compact, particularly in Florida.
I get what you are saying, but if we look at the actual differences in gearing for a weak sprinter like me we have this: (assuming 35 mph top speed on a flat without a leadout)...


50x12 = 112.5 inches 105 rpms.
53x12 = 119.2 inches 99 rpms.

50x11 = 122.7 inches 96 rpms.
53x11 = 130 inches 90 rpms.


One thing is likely certain, I will not be in the top gear for the final sprint.. lol I'm not strong enough to turn a big gear like that... It is more likely that I'll be in the 50x15/14/13 or something more manageable.

Last edited by fordfasterr; 04-16-09 at 11:32 AM.
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Old 04-16-09, 11:35 AM
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You should be spinning higher rpms when sprinting. Last crit I did I averaged 102 rpms for the race and it had 2 hills in it.

Why do you want a compact if you live in florida???
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Old 04-16-09, 11:52 AM
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Originally Posted by WCroadie View Post
You should be spinning higher rpms when sprinting. Last crit I did I averaged 102 rpms for the race and it had 2 hills in it.

Why do you want a compact if you live in florida???


It makes it a bit easier to do the Vista View races... it is a circuit race that goes over two old garbage dumps... climbing is nasty!
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Old 04-16-09, 11:54 AM
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Originally Posted by fordfasterr View Post
I get what you are saying, but if we look at the actual differences in gearing for a weak sprinter like me we have this: (assuming 35 mph top speed on a flat without a leadout)...


50x12 = 112.5 inches 105 rpms.
53x12 = 119.2 inches 99 rpms.

50x11 = 122.7 inches 96 rpms.
53x11 = 130 inches 90 rpms.


One thing is likely certain, I will not be in the top gear for the final sprint.. lol I'm not strong enough to turn a big gear like that... It is more likely that I'll be in the 50x15/14/13 or something more manageable.
The problem isn't your gearing for the sprint, or really for any time you're racing a crit. With either the 53, or a 50, you're going to be in the big ring all the time, and the only difference is which cog you select in the back.

The downside to the compact is that common cruising speeds put you right at the crossover point between the big ring and the small ring, so you end up shifting a lot back and forth, or cross chaining.

For example with a 50/34 11-23 setup, 50x19 (as far over as you want to go) at 90rpm is 19mph, and 34x13 (again as far over as you want to go) is 18.9mph. So as your speed goes up or down around 19mph
(as terrain, wind, or desired effort changes) you'll be going back and forth between the big and small ring.

For alot of people the compact puts the cross over point at an awkward point.

Admittedly it's not a big deal. But when you have zero need for a compact, why not just avoid the problem.
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Old 04-16-09, 11:56 AM
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Originally Posted by fordfasterr View Post
It makes it a bit easier to do the Vista View races... it is a circuit race that goes over two old garbage dumps... climbing is nasty!
I know it's all relative, but if this is your crit: http://www.mapmyride.com/ride/united...avie/321324572

then you're looking at two bumps that hardly qualify as climbs.
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Old 04-16-09, 12:01 PM
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Originally Posted by fordfasterr View Post
It makes it a bit easier to do the Vista View races... it is a circuit race that goes over two old garbage dumps... climbing is nasty!


With the possible exception of Sugarloaf Mountain Road Race if your not in the big ring the entire race in Florida, you're OTB anyway.

I'm pretty certain, there is not a climb in Florida that requires anything lower than a 39x23, for a rider that has the fitness to begin to be competitive.

Checked the course profile for Vista View. It's about 80 feet of climbing. The max grade is 6% for about 30 vertical feet.

http://www.mapmyride.com/ride/united...avie/483724898

Sorry, but if you need a compact for that, you're not ready to race.
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Old 04-16-09, 12:31 PM
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Old 04-16-09, 12:34 PM
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Old 04-16-09, 12:49 PM
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I've raced at bethel which has a nice little hill every lap.

I've never shifted off my 53 fwiw.
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Old 04-16-09, 01:05 PM
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one that comes in a 53x39
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Old 04-16-09, 02:19 PM
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Originally Posted by merlinextraligh View Post
With the possible exception of Sugarloaf Mountain Road Race if your not in the big ring the entire race in Florida, you're OTB anyway.

I'm pretty certain, there is not a climb in Florida that requires anything lower than a 39x23, for a rider that has the fitness to begin to be competitive.

Checked the course profile for Vista View. It's about 80 feet of climbing. The max grade is 6% for about 30 vertical feet.

http://www.mapmyride.com/ride/united...avie/483724898

Sorry, but if you need a compact for that, you're not ready to race.

He is right, I don't think anyone on here is busting your stones, just being realistic. You should really consider not getting a compact, get a 12-25 or 12-27 cassette if you are concerned, but hey do what you want.
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Old 04-16-09, 02:23 PM
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Originally Posted by fordfasterr View Post
It makes it a bit easier to do the Vista View races... it is a circuit race that goes over two old garbage dumps... climbing is nasty!
I've raced that course. I finished 12th or 13th out of 50 on it, and I'm not a climber.

Vista View is about your ability to put out sustained power for 2 minutes and then recover. Nothing else.
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Old 04-16-09, 02:52 PM
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Originally Posted by fordfasterr View Post
I get what you are saying, but if we look at the actual differences in gearing for a weak sprinter like me we have this: (assuming 35 mph top speed on a flat without a leadout)...


50x12 = 112.5 inches 105 rpms.
53x12 = 119.2 inches 99 rpms.

50x11 = 122.7 inches 96 rpms.
53x11 = 130 inches 90 rpms.


One thing is likely certain, I will not be in the top gear for the final sprint.. lol I'm not strong enough to turn a big gear like that... It is more likely that I'll be in the 50x15/14/13 or something more manageable.

If you are sprinting at 105-110 RPMs you are doing it wrong. I hit my max power when im spinning 140+
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Old 04-16-09, 06:52 PM
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Originally Posted by wfrogge View Post
If you are sprinting at 105-110 RPMs you are doing it wrong. I hit my max power when im spinning 140+


Agreed, my comment may have suggested that I would be sprinting in that gear but it was not intended to lead to that conclusion.

I was only illustrating the maximum gear ratios and rpms at the given speed of 35 mph... Sorry for the confusion.
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Old 04-16-09, 09:48 PM
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Originally Posted by merlinextraligh View Post
The downside to the compact is that common cruising speeds put you right at the crossover point between the big ring and the small ring, so you end up shifting a lot back and forth, or cross chaining.
Slightly off the topic, but I've never understood this point. Unless you cruise in the 39, you will be shifting a lot less on the compact than the standard.

With a standard, a heavy headwind or long slope might force me down into the 39, where in the same conditions on the compact I can stay in the big ring. I suppose it depends on terrain, wind, rider condition, but in my experience, compact = less changes at the front.

This isn't to say there aren't other arguments against compacts...
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Old 04-16-09, 10:11 PM
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SRM or Quarq (forget the compact )
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Old 04-16-09, 10:30 PM
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You can put a 52/38 on a compact.

Just sayin'
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Old 04-16-09, 11:01 PM
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Ultegra Sl Compact, I got one for under $200 from PBK
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Old 04-17-09, 05:42 AM
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Originally Posted by waterrockets View Post
SRM or Quarq (forget the compact )
Some of us may be getting laid off buddy, no big expenditures in my future.
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