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34x40 fun?
Last Post 07/26/2017 05:06 AM by Cosmic Kid. 36 Replies.
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Orange Crush

Posts:4499

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06/25/2017 05:54 PM
So as said, long story short - the 34x40 worked beautifully until it broke. Would share some pics but photobucket's a pain momentarily. Did about 4 kms of 10% singletrack as part of an overall 12km climb. Then went on to do back of Grouse Mountain, rough rocky forest road, mixing it up with MTB crowd. Shifting was perfect but must have caught a rock somewhere, derailleur hanger broke off 2 km below top. Hiked up rest on one of the ski runs and took the bike down on Gondola. Getting it fixed now and hopefully this was a fluke and won't repeat for Hellracer. Other than the break the setup seemed to work perfectly. That was one rough trail.

[URL=http://s1378.photobucket.com/user/Jos_Beckers/media/20170623_083041_zpsadqm0qtu.jpg.html][/URL] [URL=http://s1378.photobucket.com/user/Jos_Beckers/media/20170623_103013_zpshfspupi8.jpg.html][/URL] [URL=http://s1378.photobucket.com/user/Jos_Beckers/media/20170623_084648_zpsn3r45et3.jpg.html][/URL] [URL=http://s1378.photobucket.com/user/Jos_Beckers/media/20170623_113538_zpserqjy96t.jpg.html][/URL] [URL=http://s1378.photobucket.com/user/Jos_Beckers/media/20170623_114850_zpskxwihu6c.jpg.html][/URL] [URL=http://s1378.photobucket.com/user/Jos_Beckers/media/20170623_115254_zps3ccmcaor.jpg.html][/URL] [URL=http://s1378.photobucket.com/user/Jos_Beckers/media/20170623_124740_zpshvmkobdl.jpg.html][/URL]
Cosmic Kid

Posts:4209

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06/25/2017 07:11 PM
Bummer about the hanger.....but looks like it was a great ride until then!
Just say "NO!" to WCP!!!!
longslowdistance

Posts:2886

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06/26/2017 07:28 AM
Beautiful location.
Sorry for your mechanical. Is the issue cog too big for derailleur?
Orange Crush

Posts:4499

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06/26/2017 10:29 AM
I'll need to investigate. Nothing apparent in shifting but perhaps the 40 cog puts hanger under stress. Either way, the 40 was no luxury on steepest pitches so I may have to risk it. Between fresh hanger and a spare one that'll come along just in case, that should hopefully cover it.





There's a challenge who can make it up first 4kms of Sethon Portage without debiking. It's that kind of climb.
longslowdistance

Posts:2886

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06/26/2017 10:55 AM
Is a smaller inner chain ring an option?
Cosmic Kid

Posts:4209

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06/26/2017 10:56 AM
What was the RD again? I seem to recall it was a Tiagra?
Just say "NO!" to WCP!!!!
Orange Crush

Posts:4499

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06/26/2017 10:59 AM
Yes, Tiagra.
Cosmic Kid

Posts:4209

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06/26/2017 02:14 PM
Was it a SGS or GS RD?
Just say "NO!" to WCP!!!!
Orange Crush

Posts:4499

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06/26/2017 08:33 PM
You got me there CK. what's diff between the two?
Cosmic Kid

Posts:4209

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06/26/2017 08:35 PM
SGS is long cage, GS is mid-cage, SS is short cage.
Just say "NO!" to WCP!!!!
Orange Crush

Posts:4499

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06/26/2017 08:47 PM
It's a long cage.
Cosmic Kid

Posts:4209

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06/26/2017 09:30 PM
From what I can tell, Tiagra is only available in 2 cage lengths.....GS (mid-cage) and SS (short cage). I have nor found any Tiagra SGS (long cage) available. The max rear cog for a GS is 34T when used on a compact. using a 40T rear cog probably pushed it too far.

You may need to go to a 105 SGS RD.....but those are 11 spd, which won't work with a 10 spd cassette, so you'll need to find an older 10 spd 105 SGS RD.
Just say "NO!" to WCP!!!!
Orange Crush

Posts:4499

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06/26/2017 10:06 PM
No it was a long cage for sure. 4500 model had SGS version. Still see it on eBay.
Cosmic Kid

Posts:4209

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06/27/2017 07:35 AM
I'm pretty sure that listing is wrong, OC.....I can't find any references in Shimano literature to a 4500 SGS RD. Also, the 4500 series was 9 spd (not that it matters since 9 spd was interchangeable with 8 & 10 spds).

See 2 pdf's below....no mention of an SGS.

http://si.shimano.com/pdfs/ev/EV-RD-4500-2588.pdf

http://fish.shimano-eu.com/media/techdocs/content/cycle/SI/TIAGRA/RD-4500/SI_5VX0A_En_v1_m56577569830607047.pdf

Just say "NO!" to WCP!!!!
Orange Crush

Posts:4499

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06/27/2017 08:13 AM
Thanks CK . Curious if that is a med cage it seems very long. I will investigate.

Sounds like mix and match with 10sp Mtb long cage is not an option?
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