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Cyclocross and Gravelbiking (Recreational) This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like :The Dirty Kanza". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

Today I...but for gravel

Old 10-20-18, 05:46 PM
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Spoonrobot 
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Today I...but for gravel

I don't really ride my fixed gear anymore so I don't hang around that forum. Now I just ride around on gravel sometimes. Like today I did an event and about 3/4 of the way through my front derailleur stopped shifting properly, couldn't get it to shift up from the small ring or down from the big ring. I thought it might have been related to the massive amount of mud from the intermittent rain so the few times I needed the little ring I kicked it over with my foot and then pulled it back with my finger when I was done. Kinda a mess but I was riding solo at that point so it didn't matter. Anyway I got home and found the reason:



Kinda hard to see, so here's an oblique pic that shows it a little better.



What's really funny is that I've got 1,200 gravel miles on bike and there are zero other rock impacts anywhere on the downtube. I suspect this happened when still riding in the pack as there were a ton of rocks getting shot out from tires back, forward and to the side. Golden BB shot out of someone's tire and took out my cable.

So that's what happened to me today, anyone else have anything random to share related to their gravel rides recently?
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Old 10-20-18, 06:06 PM
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Looks like the cable outright got crushed....not the kind of thing a rock chip would do??
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Old 10-20-18, 06:16 PM
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Does the cable travel enough that the flattened area causes the problem your experiencing?
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Old 10-20-18, 06:21 PM
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Oh it wouldn't have been just a chip. Some of the rocks getting tossed around were golf ball size. There was quite a variety including sections of loose very large pebbles up to 2.5 inches or so. We had a good pack moving at high speed and rocks were flyin' when we hit the downhills and sprint sections. It's also possible it came from my front tire but ballistics have so far been indeterminate.
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Old 10-21-18, 08:34 AM
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2002 model
Thatís why I like my cables to run along the top tube. Protected and out of the way. Mechanicals suck, sorry it ruined/ changed your event!

to answer your question though, my Axis is too new to me to have issues and for the month I have had it, I still am changing things around.
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Old 10-21-18, 09:40 AM
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Originally Posted by Ghazmh View Post
Does the cable travel enough that the flattened area causes the problem your experiencing?
It's right above the area so it doesn't pass through the guide, just changed the tension enough so that the derailleur stopped functioning. I'm not sure how this affected the down shift as it should have just reverted back to the lowest setting against the limit screw. All I can figure is I changed the cable and now it works fine.

I'm not quite sure why cables along the top tube seems to have fallen out of favor? Interference with frame bags? Or is it just the easier design to run them along the down tube? My first gravel bike had top tube cables and it never had an issue, frame broke or I'd still be riding it.
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Old 10-22-18, 08:31 AM
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Originally Posted by Spoonrobot View Post
I'm not quite sure why cables along the top tube seems to have fallen out of favor? Interference with frame bags?
I'd say that's a pretty safe bet. Funny enough my Tamland is a mixture of brake lines internally through the frame and shift cables under the BB. My wife's Renegade is full housing from start to finish. Having experience with both now I can see why full housing for gravel bikes that constantly get dirty is a good design choice. My Tamland is constantly squeaking with every shift because the dirt gets in the cable guide under the bb and makes the cable squeak, it's pretty annoying.
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