Gearing down for CO25...

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Gearing down for CO25...

Postby joec » Sun Oct 16, 2011 6:34 pm

I was very happy to have completed the ride this year not too worse for the wear. There were times on some of the climbs where just a little lower gearing would have felt a little bit better.

This year, I was on a road bike with a triple 52/42/30 and 27-11 in the back. I have done other COs on a mountain bike. I felt the MTB was great in the climbs but topped out too quickly in the downs and flats.

After the ride I changed the triple to a 50/40/28, keeping the 27-11 in the back. The bike still doesn't pedal itself up a hill, but I noticed some improvements. While not a dramatic size change in the front I noticed my heartrate dropped about 5 beats and cadence increased about 10 beats on my training climb.

I had some suggestions for a compact crank setup, or to switch to a 48/38/26 but felt the chainring swap was the least invasive/hassle.

Any other ideas? Suggestions? (yeah train more...) I'm trying to dial in the gearing well in advance of the ride.

I'm looking forward to CO25...Happy New Year! 8)
joec
 
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Re: Gearing down for CO25...

Postby Chuck B. » Mon Oct 17, 2011 7:09 am

IRD 11-34 wide range touring cassette...
The voices tell the stories. I just record them for posterity.

And the voices have some good ideas sometimes!
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Re: Gearing down for CO25...

Postby trekie » Mon Oct 17, 2011 9:57 am

I made the same change to a 28 for my front small ring and it made a big difference for me. I'm able to stay seated all the way up to timberline and have not had to walk my bike on any paved road in the last ten years.
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Re: Gearing down for CO25...

Postby joec » Mon Oct 17, 2011 11:14 am

"IRD 11-34 wide range touring cassette..."

Thanks Chuck, is IRD a brand or acronym? Here's the catch, I still want to use my 105 front and rear derailleurs. Wouldn't I need to change out the RD to use a 11-34?
joec
 
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Re: Gearing down for CO25...

Postby joec » Mon Oct 17, 2011 11:16 am

trekie wrote:I made the same change to a 28 for my front small ring and it made a big difference for me. I'm able to stay seated all the way up to timberline and have not had to walk my bike on any paved road in the last ten years.


Nice...I'm on the right track...I prefer to sit as much as possible when climbing. When you have a moment can you list your complete drivetrain?

8)
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Re: Gearing down for CO25...

Postby trekie » Tue Oct 18, 2011 8:38 am

I believe it's 52 42 28 on the front and 27 to 12 on the back. I want to change the back to 27 11 so I can keep the pressure on the pedals past 45 mph on the downhills. so just about 1 to 1 for climbing [28 27] and with
11 on the back I could still be pedaling on the times I exceed 50 mph on the downhills. love the downhill. 230lb slug on the climbs but will climb
anywhere for the descent. live for the downhill!!!!
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Re: Gearing down for CO25...

Postby Don Bolton » Thu Oct 20, 2011 2:37 pm

joec wrote:"IRD 11-34 wide range touring cassette..."

Thanks Chuck, is IRD a brand or acronym? Here's the catch, I still want to use my 105 front and rear derailleurs. Wouldn't I need to change out the RD to use a 11-34?


IRD is a brand 'Interloc Racing Designs' the link below will need the leading character removed but will take you to the page you need to see
_http://www.interlocracing.com/cassettes_steel.html

My complaint about "fixing it on the cassette" is the wide jumps between most mountain ratios using traditional OEM cassettes. These help a lot in that area.

You can slip a smaller inner ring up front (limited by the crank's spider size) to perhaps even a 22T gear but the machine optimized gear ramps and pinning do not align well to jump to/from a 42 or 39 tooth center ring. Still if you can handle slower planned ring changes, this can work and if you can add in (depending on frame) a chain guide to keep it from dropping off onto the frame this can be a workable solution. You need to drop "trou" so to speak ahead of needing to though, as a rushed drop onto the little ring is not smooth when doing this. Still this is big on tandems so it can and does work.

It is best done with a 52/39 or 53/39 tooth chainring set though. The math on a 42/52 leaves every other mid ring ratio nearly the same as each outer ring ratio. (I view a triple as a double with a bail out ring for multi day tours or just grueling climbs).

Don "in the end you learn to deal with what you have though" Bolton
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Re: Gearing down for CO25...

Postby Don Bolton » Thu Oct 20, 2011 2:45 pm

trekie wrote:I believe it's 52 42 28 on the front and 27 to 12 on the back. I want to change the back to 27 11 so I can keep the pressure on the pedals past 45 mph on the downhills. so just about 1 to 1 for climbing [28 27] and with
11 on the back I could still be pedaling on the times I exceed 50 mph on the downhills. love the downhill. 230lb slug on the climbs but will climb
anywhere for the descent. live for the downhill!!!!


Unless you changed it, it's most likely a 52/42/30 as that was the defacto standard used by all the drivetrain creators for road going drivetrains. Then Came the 53,39,30, followed by 52,39,30 seen in Shimanno's current mid to upper tier road component grades.

I've tried all sorts of swaps, the best solution was more training and less eating for me :(

Don "a trend I've unfortunately reversed of late" Bolton
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Re: Gearing down for CO25...

Postby trekie » Fri Oct 21, 2011 8:28 am

Hey Don I did change it out to a 28 years ago but I agree weight control and training are probably most helpful.
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Re: Gearing down for CO25...

Postby Tender Chunks » Fri Oct 21, 2011 8:10 pm

Update From Cheapskate Land:
Uh, I have a triple up front and a bunch of gears "back there" - hell, I don't know how many. I can say with some confidence that I am somewhere between 15 and 24 "speeds". I know that when I push down on the pedal up front, the bike goes forward. I seem to recall that years ago I counted all the teeth and did all those gear-inch calculations, and for a while I sounded fairly knowledgeable, but it didn't seem to make it easier to go up hill. And young women did not throw themselves upon my person, just because I was such a smart cookie in the insider bike circle. Maybe it was my mouthwash.

I keep my chain clean and oiled, watch my tires and brakes, and keep my brainstem well lubricated. I figure - after I lose about 100# off my person, I'll worry about losing 10# off my bike. Meanwhile, instead of upgrading my ride, I keep paying down my debt, and figure there will be time enough for buying a groovy bike when the economy is back in zoom zoom land. Meanwhile, Onward Through the Fog. :P
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Re: Gearing down for CO25...

Postby davek » Mon Oct 24, 2011 9:28 am

Train more, it's cheaper... ;-)
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Re: Gearing down for CO25...

Postby mytrot001 » Thu Oct 27, 2011 1:42 pm

"Pedaling" at 50 MPH?? Having a hard time believing any of us recereationals are putting much on the pedals north of 135 RPM.......
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Re: Gearing down for CO25...

Postby Chuck B. » Tue Nov 01, 2011 7:02 am

joec wrote:"IRD 11-34 wide range touring cassette..."

Thanks Chuck, is IRD a brand or acronym? Here's the catch, I still want to use my 105 front and rear derailleurs. Wouldn't I need to change out the RD to use a 11-34?


Sorry I didn't get here sooner, I've been on vacation...

As Don said, IRD is Interloc Racing Design. As far as changing the rear derailleur, it would depend on the derailleur that you have. My Roubaix came from the factory with a long cage derailleur, so all I had to do was change the chain.
The voices tell the stories. I just record them for posterity.

And the voices have some good ideas sometimes!
Chuck B.
 
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Location: Eastern Oregon

Re: Gearing down for CO25...

Postby D/CUTTER » Tue Nov 01, 2011 2:27 pm

what ever you don't buy the ird 11x28 cassette,they are the worst of all for smooth shifting,stay with ultegra!
TIME TO ROLL
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Re: Gearing down for CO25...

Postby D/CUTTER » Tue Nov 01, 2011 2:27 pm

what ever you don't buy the ird 11x28 cassette,they are the worst of all for smooth shifting,stay with ultegra!
TIME TO ROLL
D/CUTTER
 
Posts: 17
Joined: Sat Jan 03, 2009 8:11 pm
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