Bike chain length

I've had to change rear derailleur a while back, stock had long and new one is probably medium (I couldn't find long) Also I don't really need a large sprocket on the cassettes so gone more roadie cassettes.
It's obviously too short in small small, and fine in big small, I generally use right gearing so would never use small small
But it's strange when I fitted chain and tested gearing I would have noticed it. Pretty sure it's only just appeared. So is chain too long or something else up? Rear derailleur is pretty new about 6 months of light use.
http://s33.postimg.org/k83l0kedb/bigbig.jpg
http://s33.postimg.org/wdavbdghr/bigsmall.jpg
http://s33.postimg.org/bz5yar5q7/smallbig.jpg
http://s33.postimg.org/amxwjq3zz/smallsmall.jpg
edit when I took out the new chain from the packet I did remove a few links- but perhaps never did account for different cassettes and/or cage length and just kept the same number of links when I had long cage.
Since I'm in 90% middle front then I set gears up for that and just tried all rear sprockets to make sure it's ok (in fact I bet I could switch to single front chainring and be happy with it)
It's obviously too short in small small, and fine in big small, I generally use right gearing so would never use small small
But it's strange when I fitted chain and tested gearing I would have noticed it. Pretty sure it's only just appeared. So is chain too long or something else up? Rear derailleur is pretty new about 6 months of light use.
http://s33.postimg.org/k83l0kedb/bigbig.jpg
http://s33.postimg.org/wdavbdghr/bigsmall.jpg
http://s33.postimg.org/bz5yar5q7/smallbig.jpg
http://s33.postimg.org/amxwjq3zz/smallsmall.jpg
edit when I took out the new chain from the packet I did remove a few links- but perhaps never did account for different cassettes and/or cage length and just kept the same number of links when I had long cage.
Since I'm in 90% middle front then I set gears up for that and just tried all rear sprockets to make sure it's ok (in fact I bet I could switch to single front chainring and be happy with it)
Say... That's a nice bike..
Trax T700 with Lew Racing Pro VT-1 ;-)
Trax T700 with Lew Racing Pro VT-1 ;-)
0
Posts
and chain length...
taken from the same source
Everyday Commuter
I can add that i looked at the pictures and at bigbig.jpg the chain looks too short and at small-small it is definitely too long.
I tried to put big-big on my bike and the derailleur was even more extreme, so i think you can make your chain a bit shorted and it still will be ok for big-big and maybe good enough for small-small.
Also you may try to find information about you derailleur to know what difference in transmission ratio it can deal with.
Trax T700 with Lew Racing Pro VT-1 ;-)
You should be OK running a 9 or even 10 speed rear mech with your set up, a 9spd unit from the mountain side of shimano should be readily available and work with your set up, if you can't find it in the road side.
I've just installed a 10spd 105 medium rear mech onto a 9spd drivetrain operating from an XT trigger and it works perfectly well.
Everyday Commuter
The groupset is campagnolo, so a Shimano one own't work.
Trax T700 with Lew Racing Pro VT-1 ;-)
Everyday Commuter
In front medium chainring, to any rear sprocket it's fine.
Trax T700 with Lew Racing Pro VT-1 ;-)