Pro's Riding >20% Gradients

Questions about bike hire abroad and everything light bike related. No off-topic chat please

Moderator: Moderator Team

Valbrona
Posts: 1488
Joined: Fri Oct 28, 2011 3:25 am
Location: United Kingdom of Great Britain and Northern Ireland

by Valbrona

>20% gradients pop up in pro road racing only occasionaly. I don't know about you, but if I were a pro I would maybe want something lower than a 34x27/28. This reminds me of the first time the Vuelta went up the Angliru and a good number fitted triples. You could of course do that more easily then, but that is not the case with modern electronic shift systems.

My ideal gear for a >20% is about a 26 chainring x 29 sprocket.

by Weenie


bikewithnoname
Posts: 1034
Joined: Tue Sep 22, 2009 1:29 pm
Location: UK

by bikewithnoname

there's a couple of 20-25% short hills near me the gradient only stays fierce fo 50-150m max. I would rather avoid them all together to be honest!

The lowest gear I have on my bikes is 39-29, and you can grind up it, but I'd take a 36 upfront if I could
"We live in an age when unnecessary things are our only necessities." Oscar Wilde

Pegoretti Responsorium, Parlee Z5i, Donhou Commuter, 1946 MacLeans Featherweight L'Eroica!, 2x MTB 'dales

User avatar
Tinea Pedis
Posts: 8460
Joined: Sat Mar 14, 2009 6:08 am
Location: Geelong
Contact:

by Tinea Pedis

I have the 2010 Worlds course literally on my doorstep, you can Challambra with a standard. God, Gilbert went up it in the big ring! :shock:

KWalker
Posts: 5874
Joined: Mon Dec 28, 2009 8:30 pm
Location: Bay Area

by KWalker

We have plenty of 20% gradients out there and even with a 36-25 I can't do them at over 45 RPM at 350w or so. There's a reason Cobo went with a 34-32 last year....
Don't take me too seriously. The only person that doesn't hate Froome.
Gramz
Failed Custom Bike

User avatar
prendrefeu
Posts: 8611
Joined: Wed Oct 31, 2007 10:32 pm
Location: Los Feliz, Los Angeles, California
Contact:

by prendrefeu

34-28 is good for me up to 24%.

After that it becomes very interesting. :lol:
Exp001 || Other projects in the works.

Deus
Posts: 29
Joined: Sat May 26, 2012 10:57 am

by Deus

I have just recently put a Sram 12/32 on the rear with a 34/50 upfront. Its opened a whole load more roads around my local area! (Yorkshire Dales). (However I am 6'3" and weigh approx 220lbs!!)

Sram WiFli ROCKS! :thumbup:

User avatar
wilson78
Posts: 120
Joined: Mon Jan 11, 2010 10:49 pm

by wilson78

Ride an awful lot of 20% gradients on my local loops ( edge of Dartmoor ), with the occasional 25% thrown in for good measure.
Used to ride a 39-25, but saw the light and now ride a 34-28 and certainly wouldn't want to go back!
My Titanium Lemond (RIP):
viewtopic.php?f=10&t=84352" onclick="window.open(this.href);return false;
The Trek:
viewtopic.php?f=10&t=109635

ticou
Posts: 459
Joined: Mon Mar 19, 2012 3:31 pm

by ticou

I've got 34/29. Mind you it's slinky Chorus, i havn't used the 29 yet, hope it's enough for the 'nees.

User avatar
UKpaul
Posts: 249
Joined: Wed Jan 11, 2006 12:57 pm
Location: Glossop UK

by UKpaul

Tinea Pedis wrote:I have the 2010 Worlds course literally on my doorstep, you can Challambra with a standard. God, Gilbert went up it in the big ring! :shock:



When I watched it on TV it didnt really look that steep. I really didnt know it was that bad. The pros make it all look so easy.
I rode the Tourmalet a few years ago on a compact and I remember seeing a few pros in the big ring on the TV.
:unbelievable:

User avatar
ave
Posts: 1721
Joined: Sun Dec 28, 2008 10:15 pm
Location: Hungary

by ave

I had tried some 25%+ gradients, where actually having the front wheel on the road was a challenge, and at the same time I could hear the rear tires slipping (squeaking) too.
All at very slow speeds, of course and very low cadance.

It's just silly. No fun. I say 10-15% is hard enough to race on.

User avatar
Tinea Pedis
Posts: 8460
Joined: Sat Mar 14, 2009 6:08 am
Location: Geelong
Contact:

by Tinea Pedis

UKpaul wrote:When I watched it on TV it didnt really look that steep.

Would seem I don't know what I'm on about then.

ricerocket
Posts: 502
Joined: Mon Sep 27, 2010 8:38 am

by ricerocket

ave wrote:I had tried some 25%+ gradients, where actually having the front wheel on the road was a challenge, and at the same time I could hear the rear tires slipping (squeaking) too.
All at very slow speeds, of course and very low cadance.

It's just silly. No fun. I say 10-15% is hard enough to race on.


You're doing it wrong.

rustychain
Posts: 3915
Joined: Tue Jun 22, 2004 11:42 pm
Location: lat 38.9677 lon 77.3366
Contact:

by rustychain

The grade is one part of the equation, how long said grade means more to me. I can struggle but retain some dignity on a 22 percent for perhaps 1/2 mile. I did one that was approx 1 mile at 22 percent but went to 24 for the next mile. and suffered like a pig, almost lost my lunch in fact, I was using a 36x25. Going to a 34x29 was better, left something in my legs for the next climb. Average speed was better as well. Still not close to being easy
WW Velocipedist Gargantuan

BobSantini
Posts: 292
Joined: Sun Jul 10, 2011 9:03 am

by BobSantini

UKpaul wrote:
Tinea Pedis wrote:I have the 2010 Worlds course literally on my doorstep, you can Challambra with a standard. God, Gilbert went up it in the big ring! :shock:



When I watched it on TV it didnt really look that steep. I really didnt know it was that bad. The pros make it all look so easy.
I rode the Tourmalet a few years ago on a compact and I remember seeing a few pros in the big ring on the TV.
:unbelievable:


I think the Tourmalet is ~10%
r o y g b i v

by Weenie


airwise
Posts: 1049
Joined: Tue Jul 27, 2010 8:31 pm

by airwise

With modern gearing it's becoming less and less of an issue to be honest.

Witness Contador running SRAM WiFli and others running compacts with 32's on the back.

On the Zoncolan in 2010 Basso rode 36/29.

With pro's running 34/30 and smaller this year, it should not be a surprise that lesser mortals are best served by MTB gearing.

On the Tre Cime earlier this Summer, I was running a 34/25. Riding tempo, I was putting out 4 w/kg and my cadence was down to 35 rpm. Not efficient.

Modern gearing means that pros seem to be able to ride more or less anything in France like a flat TT with the correct bike setup. We need gradients that make a difference IMHO, and anything above 20% sure does that!

Post Reply
  • Similar Topics
    Replies
    Views
    Last post