jberenyi

[QUOTE=krazyderek]I've read about these chainrings flaking off their finish. QUOTE]


You are so right about the finish. I haven't even put 300 miles on this bike and already the plating is flaking off showing the copper plate. I just inspected the large chain ring teeth with my Optivisor 7X and I can't believe my eyes. One tooth is actually worn severely shorter than all the others. Some of them were burred badly and some worn. Even if Truvativ gives me another ring under warranty I wouldn't accept it. It would just prematurely wear again. And this has nothing to do with my ability to keep a chain clean and lubed. I was using Triflow for the longest time until I switched to Rock n' Roll Gold Chain lube which is the cat's meow. At this point I will either switch to FSA or go Dura-Ace all the way. The only thing with FSA is that their rings are black.

jberenyi

Just to let everyone know. Truvativ sent a new chain ring for warranty replacement but I'm not installing it. I got a new Ultegra 10-speed large and small chain ring. I can't begin to describe the smoothness of these chain rings. At one point on my ride today I had to double check if the chain shifted down in the rear. It trully is amazing. I also looked at the machining of the two rings and there is such a huge difference with the two brands. Its clearly evident that Shimano knows there @hit about cranksets. Thanks for everyone's input.

Mike552

I never understood the fascination with those cheap-asz Truvativ crank sets. It speaks volumes about a bike manufacturer, I think. Buying a 2000+ dollar bike with one of those cheapo "bling" looking cranks is really disappointing, isn't it?

Grasschopper

The cranks is fine it is the rings that have issue as the OP found out and has resolved. It would be interesting to see a photo of the cranks with the new rings.

Mike552

If the rings came on the crank at time of purchase... I would consider the overall product to be garbage. I would not let Truvativ slide on this issue, I mean c'mon, the damn thing is made up of 4 pieces.. how stupid does a company have to be to fukk something like that up??? Honestly....

jberenyi

Per your request:

Patriot

I think what's happening, is that the rotational alignment of the large to small chainrings is slightly off. Basically, if the rings are rotated in the wrong direction, and are slightly off, then what will happen is that when you down shift to the small ring, there is too much tension between the large and small ring. So, when the crank rotates, the chain doesn't have enough slack to release itself sideways off of the large ring at the bottom of your stroke.
The problem is the location of the chainring bolt holes. They were machined slightly off from spec, so the whole ring is rotated slightly off line.

The only way to solve this problem is to figure out which chainring/s is slightly off rotational alignment, and replace it/them.

Sirrobinofcoxly

The Dura-Ace would match the rest of your bike nicely

jberenyi

For now I think I'll just stick to this setup and save up for the Dura-Ace. Just got back from a 25 mile ride with a 25 mph head wind and the bike responded very well with the Shimano setup. Even at the extreme limits there is no sound when cross-chaining. On the old chain rings I couldn't go large chain ring and largest cog at all without grinding and clanking. But this new setup is silent. Shimano is the only way to go in my book. BTW, I use Rock n' Roll chain lube and I can't believe how awesome that stuff is. The chain always stays clean and it shifts effortlessly. Beats the hell out of that TriFlow solvent.