Gearing Question
#1
Roubaix Fan
Thread Starter
Join Date: May 2013
Location: North-Central VT (just outside Montpelier)
Posts: 8
Bikes: 2004 Titus Racer-X, 2010 Specialized Roubaix Pro SL2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
Gearing Question
I'm running a Specialized Roubaix Pro SL2 with a mix of Red and Force components. My chainrings are 50/34, my cassette is 11-28 (Ultegra I think). Living in Vermont I've been struggling with the Cat 4 and steeper climbs, I could really use one or two easier gears. I know, 34-28 isn't bad, but being a spinner, I just can't spin it fast enough, so I end up more like Jan Ulrich and have to pound the gears to get up our gap rides, resorting to switchbacking using the whole road at times. I was wondering if I can go to an 11-32 cassette and keep my Red rear and front Force derailiers, or can I go down to a 30 small chainring, (but then do I need to go down to a 48 big chainring)? I have the Pro model S-Works carbon crank (stock on this bike), so I don't even know if going down to smaller chainrings is an option which is why I thought the cassette option might be the better way to go..
#2
Banned
may just have to add a the Long cage RD or at least Medium, if you will adopt a Triple crank.
Hollow tech stuff means whole crank as the tube spindles are attached tothe Rt Crankarm now..
Compact double .. 34:34 is the best you can Do..
Hollow tech stuff means whole crank as the tube spindles are attached tothe Rt Crankarm now..
Compact double .. 34:34 is the best you can Do..
#3
Roubaix Fan
Thread Starter
Join Date: May 2013
Location: North-Central VT (just outside Montpelier)
Posts: 8
Bikes: 2004 Titus Racer-X, 2010 Specialized Roubaix Pro SL2
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I figure red can handle 54/39 rings and 11-28 cassettte, wonder if the Red RD can handle 50/34 and 12-30 cassette. Has anyone actually tried this? I know all the literature says 28 is max on the back, but I want to see if anyone actually tried the new 12-30 with the compact 50-34...
#4
Banned
Wrap, chain take up, math is tooth counts (Big+ big ) --( Little + little ) .
don't own that exact kit . so Hands on owners of that combo,
May be a while before someone else pipes up.
good luck or just give it a try
don't own that exact kit . so Hands on owners of that combo,
May be a while before someone else pipes up.
good luck or just give it a try
#5
Senior Member
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656
Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!
Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times
in
742 Posts
You cannot go below the current 34T chainring by enough to matter as your crank's 110mm bolt circle diameter will accept a 33T chainring as an absolute minimum. If you really need a true granny chainring you will need a triple crank and SRAM does not offer one in any of their road groups.
#6
Senior Member
Join Date: Jul 2005
Location: Boulder County, CO
Posts: 4,397
Bikes: '80 Masi Gran Criterium, '12 Trek Madone, early '60s Frejus track
Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 514 Post(s)
Liked 449 Times
in
338 Posts
I figure red can handle 54/39 rings and 11-28 cassettte, wonder if the Red RD can handle 50/34 and 12-30 cassette. Has anyone actually tried this? I know all the literature says 28 is max on the back, but I want to see if anyone actually tried the new 12-30 with the compact 50-34...
Try it and see. If it doesn't work, an Apex rear derailleur can be had for less than $80. And if you're concerned about mixing SRAM levels, don't be. Contador won the Giro using an Apex rear derailleur before WiFli became available for Red.
It's highly likely you'll need a longer chain.
Last edited by oldbobcat; 05-13-13 at 10:28 PM.
#7
Senior Member
Join Date: Jun 2012
Posts: 126
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
This might help you.
https://home.earthlink.net/~mike.sherman/shift.html
https://home.earthlink.net/~mike.sherman/shift.html
#8
Senior Member
Join Date: Jan 2011
Location: Northern CA
Posts: 517
Bikes: Pinarello Paris/Ui2, BMC TeamMachine SLR01/Campy Record EPS
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times
in
0 Posts
I've used a SRAM Red WiFli (longer cage) RD successfully with an SRAM XG-1099 11-32 cassette in combination with a compact (50-34) crank set. Works beautifully and letts me keep my cadence > 75 on all but the very steepest grades around here. And I'm a poor climber... BTW, it did require an addition link length in the chain.
#9
Low car diet
Join Date: Aug 2007
Location: Corvallis, OR, USA
Posts: 2,407
Bikes: 2006 Windsor Dover w/105, 2007 GT Avalanche w/XT, 1995 Trek 820 setup for touring, 201? Yeah single-speed folder, 199? Huffy tandem.
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Likes: 0
Liked 4 Times
in
4 Posts
Generally good practice to change the chain when changing cassettes. Unless the chain is very new, I wouldn't personally add links.
Thread
Thread Starter
Forum
Replies
Last Post
dreamwalkn
Clydesdales/Athenas (200+ lb / 91+ kg)
8
05-13-13 01:39 PM
AK404
Road Cycling
39
11-05-12 10:52 PM
hobkirk
Road Cycling
15
06-04-10 05:14 PM