Go Back  Bike Forums > Bike Forums > Commuting
Reload this Page >

mountain triple, compact double, etc.?

Commuting Bicycle commuting is easier than you think, before you know it, you'll be hooked. Learn the tips, hints, equipment, safety requirements for safely riding your bike to work.

mountain triple, compact double, etc.?

Reply

Old 10-23-09, 12:44 PM
  #1  
TurbineBlade
Kid A
Thread Starter
 
TurbineBlade's Avatar
 
Join Date: Aug 2009
Location: Alexandria, VA
Posts: 1,778
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
mountain triple, compact double, etc.?

I currently run a standard double set-up 52-42 with a 12-34t cassette and it works great for commuting.....but I am thinking about loaded touring and want some lower gears.

What options would allow me to use my regular double FD? What is the best or least expensive route? Any brands?

Thanks,
TurbineBlade is offline  
Reply With Quote
Old 10-23-09, 12:50 PM
  #2  
CycleBiker
Senior Member
 
Join Date: Feb 2009
Location: St Louis
Posts: 180
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You could do what I did on my light touring bike and go with an 11 tooth cog so that I could drop the big ring to a 44 (and still have a top ratio equal to a 52/13). Pick the rest of the cogs and small chainwheel to suit. I set up with half-step plus alpine gearing so that 1 shift on the front equals 1 1/2 on the back so I have 16 actually different gear ratios with my 8 speed setup.
CycleBiker is offline  
Reply With Quote
Old 10-23-09, 01:31 PM
  #3  
Thor29
Senior Member
 
Thor29's Avatar
 
Join Date: Aug 2005
Posts: 757
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I think your best bet would be to install a compact double with a 34/50 chainring setup. You'll gain a lot more on the bottom end than you'll lose on the top. i wouldn't go for a mountain triple unless you think you really need that super low gear. A mountain triple would need a different front derailleur and if you are using STI shifters they might not be compatible (bar end shifters will still work though).
Thor29 is offline  
Reply With Quote
Old 10-23-09, 01:56 PM
  #4  
buck65
cherish the day
 
buck65's Avatar
 
Join Date: Jun 2006
Location: South Pasadena, CA
Posts: 364

Bikes: Rivendel Sam Hillborne, SOMA San Marcos

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you're interested in inexpensive, you can just swap out chainrings. Just make sure the BCD of your old rings match your new ones. After that, all you need to do is lower the FD, add a new shift cable and end cap.

If you were to just swap out your 42t with a 34t Sugino chainring, you're looking at about $25.....add another $40 if you go for a 50t chainring also.
buck65 is offline  
Reply With Quote
Old 10-23-09, 02:02 PM
  #5  
TurbineBlade
Kid A
Thread Starter
 
TurbineBlade's Avatar
 
Join Date: Aug 2009
Location: Alexandria, VA
Posts: 1,778
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
My current crankset is a 130 BCD, so I think the 38 is the smallest they make. I would need to get a compact crankset I think.

I use friction DT shifters...old school and simple.

Thanks for the resonses so far!
TurbineBlade is offline  
Reply With Quote
Old 10-23-09, 03:34 PM
  #6  
aley
Goathead Magnet
 
aley's Avatar
 
Join Date: Nov 2005
Location: Albuquerque, NM
Posts: 670

Bikes: Surly LHT, Cannondale Caffeine F3

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Originally Posted by Gene2308 View Post
My current crankset is a 130 BCD, so I think the 38 is the smallest they make. I would need to get a compact crankset I think.

I use friction DT shifters...old school and simple.

Thanks for the resonses so far!
You are correct, 38 is the minimum size on a 130 BCD.

My choices would be either a compact double (50/34, as suggested by another poster) or a road triple - 52/42/30 is pretty standard, but you can always swap chainrings if you want. On my touring bike I have 46/39/24, and I shift it just fine with an ancient Shimano 600 and a friction shifter.
aley is offline  
Reply With Quote
Old 10-23-09, 04:19 PM
  #7  
genec
genec
 
genec's Avatar
 
Join Date: Sep 2004
Location: West Coast
Posts: 26,244

Bikes: custom built, sannino, beachbike, giant trance x2

Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
Quoted: 5841 Post(s)
Depends on how loaded your touring is.

My bike weighed in at over 70 LBS when it was all loaded, not counting water and food.

A triple can be real nice when your load gets that heavy and the hills rise to the sky.
genec is offline  
Reply With Quote
Old 10-23-09, 07:27 PM
  #8  
CycleBiker
Senior Member
 
Join Date: Feb 2009
Location: St Louis
Posts: 180
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Originally Posted by genec View Post
Depends on how loaded your touring is.

My bike weighed in at over 70 LBS when it was all loaded, not counting water and food.

A triple can be real nice when your load gets that heavy and the hills rise to the sky.
Why not skip the triple and, if using a 11 tooth small cog , just go with a double like 44/28 or 42/24.
CycleBiker is offline  
Reply With Quote
Old 10-23-09, 08:00 PM
  #9  
fender1
Senior Member
 
fender1's Avatar
 
Join Date: Jan 2006
Location: Berwyn PA
Posts: 5,959

Bikes: I hate bikes!

Mentioned: 27 Post(s)
Tagged: 0 Thread(s)
Quoted: 241 Post(s)
Originally Posted by Gene2308 View Post
My current crankset is a 130 BCD, so I think the 38 is the smallest they make. I would need to get a compact crankset I think.

I use friction DT shifters...old school and simple.

Thanks for the resonses so far!
Since you are running in friction mode I would suggest a compact double using a TA Pro Vis 5 crankset. You can run chainrings from as large as 62th to as a small as 26th or 24th (I can't remember!). I currently run this type of crankset with 46/30 chainrings, a 7 speed IRD freewheel (12-32) and suntour barcons. Shifts great and plenty of low range gears when they are needed.
fender1 is offline  
Reply With Quote
Old 10-23-09, 08:55 PM
  #10  
bugly64
Share the road.
 
bugly64's Avatar
 
Join Date: Jul 2008
Location: Marysville, CA
Posts: 1,230

Bikes: Van Dessel WTF, Rocky Mountain Fusion, 2013 Santa Cruz Tallboy LTc, 2015 Teammachine SLR03, Yuba Mundo, 2008 Brompton M3L

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 33 Post(s)
I have an 105 compact double 50-39t with SRAM 11-28t OG-1070 10spd cassette and it works really nice. I had to get the long tail rear derailluer for this setup. I have the triple Ultegra crank and all I need is the triple front derailluer.
bugly64 is offline  
Reply With Quote

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service