Go Back  Bike Forums > Bike Forums > Cyclocross and Gravelbiking (Recreational)
Reload this Page >

Another gearing question 1x9 to 2x

Notices
Cyclocross and Gravelbiking (Recreational) This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like : "Unbound Gravel". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

Another gearing question 1x9 to 2x

Old 01-27-17, 09:42 AM
  #1  
Senior Member
Thread Starter
 
Skankingbiker's Avatar
 
Join Date: Jul 2009
Location: Wisconsin
Posts: 410

Bikes: AllCity Nature Boy, On-one Pompino) , Fuji Roubaix road bike, Niner EMD, Voodoo Hoodoo MTB, Surly Pugsley/Krampug, Performer Midracer Custom

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Liked 5 Times in 3 Posts
Another gearing question 1x9 to 2x

I am switching my planet x london road over from CX mode to gravel mode. Currently running a 1x9 = 40 x 11/34.

Plan on doing a fair amount of hilly gravel rides and some loaded touring.

I am running a raceface evolve crankset with a 104/64 bcd. I have Sora sti double shifters

What should I be looking at for gearing options?

Should I go with a tight 46/34 using either side of the front spider, or go with a 46/28 using the inner spider. I think the granny gear may be too low.
Skankingbiker is offline  
Old 01-28-17, 10:55 AM
  #2  
Senior Member
 
DarKris's Avatar
 
Join Date: Dec 2015
Location: Buffalo, NY
Posts: 619

Bikes: Kona Kahuna DL Drop Bar - Sensah SRX Pro 1x11 (2012 Frame), Giant Toughroad GX 1 - Shimano Road Hydro + SLX 1x10 (2018), Diamondback Sync'r - SRAM NX 1x12 (2020)

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 160 Post(s)
Liked 97 Times in 54 Posts
46-28 for a double crank setup sounds......not good, however I'm no expert on that subject. I think you would have a better time going with something like a 46/30 if you're running tires around 35c or more. If you're on 32c tires 46/32-34 should also work well. I'm also assuming that you have the ability to mix and match different chaining combos together so if that's the case then more power to you.
DarKris is offline  
Old 01-28-17, 11:42 AM
  #3  
Senior Member
Thread Starter
 
Skankingbiker's Avatar
 
Join Date: Jul 2009
Location: Wisconsin
Posts: 410

Bikes: AllCity Nature Boy, On-one Pompino) , Fuji Roubaix road bike, Niner EMD, Voodoo Hoodoo MTB, Surly Pugsley/Krampug, Performer Midracer Custom

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Liked 5 Times in 3 Posts
Originally Posted by DarKris
46-28 for a double crank setup sounds......not good, however I'm no expert on that subject. I think you would have a better time going with something like a 46/30 if you're running tires around 35c or more. If you're on 32c tires 46/32-34 should also work well. I'm also assuming that you have the ability to mix and match different chaining combos together so if that's the case then more power to you.
I am leaning towards a 46/32-34, as I am planning on running between 35-40 tires. I read that shimano rings wont work on a race face crank. I am not sure about sram/truvativ
Skankingbiker is offline  
Old 01-28-17, 11:54 AM
  #4  
Sunshine
 
mstateglfr's Avatar
 
Join Date: Aug 2014
Location: Des Moines, IA
Posts: 16,718

Bikes: '18 class built steel roadbike, '19 Fairlight Secan, '88 Schwinn Premis , Black Mountain Cycles Monstercross V4, '89 Novara Trionfo

Mentioned: 124 Post(s)
Tagged: 0 Thread(s)
Quoted: 11058 Post(s)
Liked 7,611 Times in 4,246 Posts
You mention loaded touring. I would struggle with a 1-1 bailout gear (34-34) when riding fully loaded. You may be a stronger rider though.

46/34 is what i have on my gravel bike, mated to an 11-36 cassette. The 34-36 is enough for me to climb gravel hills unloaded.
Loaded riding is a different beast.
mstateglfr is offline  
Old 01-28-17, 11:55 AM
  #5  
Senior Member
Thread Starter
 
Skankingbiker's Avatar
 
Join Date: Jul 2009
Location: Wisconsin
Posts: 410

Bikes: AllCity Nature Boy, On-one Pompino) , Fuji Roubaix road bike, Niner EMD, Voodoo Hoodoo MTB, Surly Pugsley/Krampug, Performer Midracer Custom

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 58 Post(s)
Liked 5 Times in 3 Posts
Originally Posted by mstateglfr
You mention loaded touring. I would struggle with a 1-1 bailout gear (34-34) when riding fully loaded. You may be a stronger rider though.

46/34 is what i have on my gravel bike, mated to an 11-36 cassette. The 34-36 is enough for me to climb gravel hills unloaded.
Loaded riding is a different beast.
The loaded stuff is going to be flat rail/trail camping.
Skankingbiker is offline  
Old 01-30-17, 02:45 PM
  #6  
Senior Member
 
Tim_Iowa's Avatar
 
Join Date: Jun 2013
Location: Cedar Rapids, IA
Posts: 1,643

Bikes: 1997 Rivendell Road Standard 650b conversion (tourer), 1988 Schwinn Project KOM-10 (gravel/tour), 2013 Foundry Auger disc (CX/gravel), 2016 Cannondale Fat CAAD 2 (MTB/winter), 2011 Cannondale Flash 29er Lefty (trail MTB)

Mentioned: 6 Post(s)
Tagged: 0 Thread(s)
Quoted: 167 Post(s)
Likes: 0
Liked 5 Times in 5 Posts
I tried a 46/30 crankset on a road bike (11-28t cassette) for a short time, and I didn't really like it. The 16 tooth drop felt huge, like dropping directly from the big ring of a triple to the granny.
With a wide 11-34 cassette, you could presumably stay in the big ring longer, and avoid dropping to the small ring in the middle of a climb (which required 3 up-shifts in the rear to match, for me).

With your 104/64 BCD crankset, you have lots of options. However, some big rings have shift aids (ramps, pins, etc) that are designed to be paired with a specific size small ring (most often, a 12 or 14 tooth difference).

Personally, I'd go with something like 46/32, 44/30, or 42/28. Or even tighter 44/32 or 42/30 rings.

I have a 34 x 34 low gear on my cross/gravel bike, and it has been low enough for some of the steep (but short) gravel and B-roads I ride in east-central IA. I do use it pretty often and I'm thankful I set the bike up that way. 32 x 34 would probably be even better, but I'd need to change my crankset to get that.
Tim_Iowa is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Donsell
General Cycling Discussion
14
07-18-17 07:19 PM
Barrettscv
Cyclocross and Gravelbiking (Recreational)
42
02-25-17 08:52 AM
mstateglfr
Cyclocross and Gravelbiking (Recreational)
76
10-10-16 03:24 PM
Lars Halstrom
Cyclocross and Gravelbiking (Recreational)
13
08-19-15 07:40 PM
bikemig
Fifty Plus (50+)
25
07-01-14 08:21 AM

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.