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STI's and touring: Granny gears

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STI's and touring: Granny gears

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Old 08-21-14, 06:11 AM
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Originally Posted by ThermionicScott
I probably could have worded my response better. I love going fast on downhills while touring, but didn't reckon the OP would need much more than his current 48/12 (not far from your 46/11) to do that, and figured that getting adequate low gears was a more important consideration. In the end, I think everyone ought to have gearing that makes them happy.
Partly my mistake. I agree that a 48 tooth chainwheel is probably adequate for a high gear, especially if paired with an 11 tooth cog (117 gear inches). Many tourists go with a 44/11 or even a 44/12 which spin out quickly on downhills. I do agree that low gears are important and jimmystewart's current crank nor the 105 crank will provide adequate low gears for touring.
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Old 08-21-14, 09:45 AM
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The distinction between Shimano's road and mountain groupsets is a marketing one. In practice, you can mix and match components with no problems.

On my commuter bike, I have a Shimano Tiagra STI set that I run with a MTB 44-34-22 triple crankset and a Shimano mountain Deore rear derailleur with no problems. The rear cassette is a Shimano mega-range 11-34. It can be done.
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Old 08-21-14, 11:00 AM
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Originally Posted by NormanF
In practice, you can mix and match components with no problems.
to an extent
yes
but there are a few combinations that don't play well together

like
dyna sys rear derailleurs
do not work with sti levers
and sti levers
do not work with mtb front derailleurs
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Old 08-21-14, 12:56 PM
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I didn't know that! Useful information.
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Old 08-21-14, 02:07 PM
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I've been following this thread with great interest as I'm in the process of trying to convert my 2013 Randonee from bar ends to 105 5703 brifters. Current setup is a LX, 44/32/22 crankset with a LX front derailleur. Rear Cassette is a 11X32. I know I need a 9sp Shimano rear derailleur but didn't know I need a Shimano road front derailleur. Does anyone have any advise as to what the best front derailleur for the 44/32/22 crank would be?

Thanks
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Old 08-22-14, 04:53 AM
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Originally Posted by edthesped
...Does anyone have any advise as to what the best front derailleur for the 44/32/22 crank would be?

Thanks
Most often suggested FD for STI is Shimano Tiagra triple (FD-4503) on the touring forum.

Brad
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Old 08-22-14, 05:29 AM
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Thanks, I'm glad I didn't pull the trigger on the FD-4603...

Originally Posted by bradtx
Most often suggested FD for STI is Shimano Tiagra triple (FD-4503) on the touring forum.

Brad
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Old 08-22-14, 05:44 AM
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Originally Posted by edthesped
Thanks, I'm glad I didn't pull the trigger on the FD-4603...
It's possible the FD-4603 would work just as well, but hasn't been used as often. There's always the possibility that a mix and match won't work as anticipated, but the 4503 has worked for many.

Brad
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Old 08-22-14, 08:03 AM
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It looks like the Jtek shiftmate straight may also be an option..

Jtek ShiftMate Straight

I'm starting to think the switch to brifters may be better suited to a winter project rather than a Friday night job as originally intended.


Originally Posted by bradtx
It's possible the FD-4603 would work just as well, but hasn't been used as often. There's always the possibility that a mix and match won't work as anticipated, but the 4503 has worked for many.

Brad
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