Front Derailleur Esoteric Quest
01-24-21, 09:55 PM
#51
(rhymes with spook)
Join Date: Aug 2009
Location: Winslow, AR
Posts: 2,788
Bikes: '83 univega gran turismo x2, '85 schwinn super le tour,'89 miyata triple cross, '91 GT tequesta, '90 yokota grizzly peak, '94 GT backwoods, '95'ish scott tampico, '98 bonty privateer, '93 mongoose crossway 625, '98 parkpre ariel, 2k'ish giant fcr3
Mentioned: 26 Post(s)
Tagged: 0 Thread(s)
Quoted: 919 Post(s)
Liked 745 Times
in
546 Posts
mtb's have higher bottom bracket, so it's easy for a longer cage to clear the stay when/if using smaller rings on them
01-24-21, 11:22 PM
#52
Senior Member
Join Date: Dec 2019
Location: South Shore of Long Island
Posts: 2,785
Bikes: 2010 Carrera Volans, 2015 C-Dale Trail 2sl, 2017 Raleigh Rush Hour, 2017 Blue Proseccio, 1992 Giant Perigee, 80s Gitane Rallye Tandem
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 1079 Post(s)
Liked 1,019 Times
in
719 Posts
I did check the Tiagra a lot more tonight and I think I might have to cancel my order for the derailleurs, they might not work at all. The 4700 tiagra der I do have, like several other random, more modern ders, has an offset to the front and rear plates that would not allow plates to be screwed together at an alternate location like an older style might. However the plates, in part due to thickness and in part due to shaping are incredibly stiff compared to a number of older ders that I have. Makes me wonder if just cutting and shaping wouldn't have enough stiffness. The back plate has two widely spaced connection points plenty of shaping to make it stiff for pushing and the front plate is pulling where it is strongest. I'd suspect the upshift would be where it might have the most trouble and if Gavenelle doesn't come up with more shifters I might have to test out the new disc sander and the grinder and find out just how stiff the der is without the sides connected.
01-25-21, 12:38 AM
#53
small ring
Join Date: Jul 2012
Location: PNW
Posts: 1,024
Mentioned: 24 Post(s)
Tagged: 0 Thread(s)
Quoted: 437 Post(s)
Liked 925 Times
in
370 Posts
__________________
72 Bob Jackson -- 74 Motobecane Grand Jubile -- 74 Sekine SHS 271 -- 80 Nishiki International
85 Shogun 800 -- 86 Tommasini Super Prestige -- 92 Specialized Rockhopper -- 17 Colnago Arabesque
72 Bob Jackson -- 74 Motobecane Grand Jubile -- 74 Sekine SHS 271 -- 80 Nishiki International
85 Shogun 800 -- 86 Tommasini Super Prestige -- 92 Specialized Rockhopper -- 17 Colnago Arabesque
01-25-21, 11:00 PM
#54
Senior Member
Reasons for an IHG with cogs:
- No front derailleur so can use a chainguard.
- Needs a tall overdrive because of tiny wheels, like a Brompton.
- Needs an ultra-low granny because pedaling a recumbent towing a heavy trailer up hills.
01-26-21, 06:37 AM
#55
Señor Member
Thread Starter
Join Date: Oct 2004
Location: Hardy, VA
Posts: 17,922
Bikes: Mostly English - predominantly Raleighs
Mentioned: 70 Post(s)
Tagged: 0 Thread(s)
Quoted: 1491 Post(s)
Liked 1,090 Times
in
638 Posts
That's 63. I'm guessing 3 front x 9 rear x 3 IHG = 81 = no reason for it on that bike.
Reasons for an IHG with cogs:
- No front derailleur so can use a chainguard.
- Needs a tall overdrive because of tiny wheels, like a Brompton.
- Needs an ultra-low granny because pedaling a recumbent towing a heavy trailer up hills.
Reasons for an IHG with cogs:
- No front derailleur so can use a chainguard.
- Needs a tall overdrive because of tiny wheels, like a Brompton.
- Needs an ultra-low granny because pedaling a recumbent towing a heavy trailer up hills.
- Because I feel like it.
__________________
In search of what to search for.
In search of what to search for.
Likes For USAZorro:
