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Old 03-26-12, 06:51 AM   #1
wheels78
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Have flat bars and trigger shifters on your bike? What front Derailleur are you using

I've got a 48 tooth big ring and I'm told that mt bike derailleurs are not designed to work with that big of a chainring. I know there are a lot of people using flat bars with touring chainrings and trigger shifters so what are you using and has it been temperamental or is it working well?

Thank you,
BW
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Old 03-26-12, 07:26 AM   #2
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trigger, like mountain? use a mountain triple FD. will shift 48s big rings no problem.
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Old 03-26-12, 10:01 AM   #3
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None on one bike, Deore LX, Suntour XCM and Suntour GT. All are triples.

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Old 03-26-12, 11:44 AM   #4
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Quote:
Originally Posted by wheels78 View Post
I've got a 48 tooth big ring and I'm told that mt bike derailleurs are not designed to work with that big of a chainring. I know there are a lot of people using flat bars with touring chainrings and trigger shifters so what are you using and has it been temperamental or is it working well?

Thank you,
BW
Most current Shimano MTB FDs will handle a 48 tooth chainwheel. There are a few models designed for a max of 44 teeth. (AFAIK everthing at the Deore level and lower can handle 48.)

EDIT: It looks like at the higher end alot of the newer FDs are 44T max but there are still FDs that can handle 48T.

Last edited by Bezalel; 03-26-12 at 04:30 PM.
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Old 03-26-12, 04:34 PM   #5
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Once upon a time, when 14T was the smallest cog on common freewheels, 48T big rings were the standard for mtbs. As bezalel says, still plenty that can handle 48T just fine.
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Old 03-29-12, 07:49 AM   #6
wheels78
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Thanks everyone for the feedback

Bob
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Old 03-29-12, 07:45 PM   #7
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The Gudereit RC60 I just bought today has a Deore LX front derailleur and a Deore LX 48T trekking crank, both OEM. I've used both Deore LX and 105 triple front derailleurs, both work equally well if positioned properly on the downtube.
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Old 04-01-12, 08:46 AM   #8
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I just went through the process of specifying components for a Salsa Vaya frame flatbar setup and the front derailer/crankset caused the most confusion.
The frame specifies road chainline with a road compact double or triple crankset so that meant mtb cranksets were out of the question for that frame. I got a 48/36/28 touring square spindle crankset ($80) from Urbane Cyclist in Toronto.
Urbane recommended a top swing Shimano SLX front derailer ($40) for use with a Shimano XT shifter and I'm pleased to say that it works perfectly. A few anxious moments setting it up but that was due to my own inexperience. A bit of fussing around with height, rotation, limit settings and cable tension and it shifts like butter on the usable combinations.
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Old 04-01-12, 12:23 PM   #9
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none, my trigger-shifter goes with my Sturmey Archer AW3 hub.

on my Derailleur bikes I use either a thumb shifter [albatross chromo]
or bar end shifters on the drop bar ones..
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