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Are Deda Ti bolts always this bad?

Posted: Mon Oct 07, 2013 4:46 pm
by MajorMantra
I recently built my bike with a Deda Zero 100 Servizio Corse stem. Standard, good quality allen keys seemed a poor fit in the bolt heads and one of them came close to rounding at around 4Nm.

I'm now on the hunt for nice SS bolts to substitute, but have to say I'm pretty underwhelmed. I've worked on other bikes with Deda stuff and don't remember a particular issue.

Oh, and before anyone impugns my mechanical abilities, know that I'm a shop mechanic and I've built a lot of bikes.

Are Deda Ti bolts always this bad?

Posted: Mon Oct 07, 2013 4:46 pm
by Weenie

Re: Are Deda Ti bolts always this bad?

Posted: Mon Oct 07, 2013 5:16 pm
by liam7020
Yeah the bolts on that stem really are that bad.

Re: Are Deda Ti bolts always this bad?

Posted: Mon Oct 07, 2013 5:18 pm
by ergott
I've had a few and never had a problem. Just adding my data point.

Re: Are Deda Ti bolts always this bad?

Posted: Mon Oct 07, 2013 6:33 pm
by mythical
Sure, some bolts are stubborn. Anyway, in all my years with the various Deda products that passed my hands, I never experienced a single bolt failure. When a bolt and tool didn't fit properly, I usually forced the tool into an angle after insertion not to damage the bolt. That always did the trick. My most commonly used tool was a Park Tool Y-wrench. Alternatively, you can fit a Torx T25 into a 4mm Allen bolt and, if it's rounded, perhaps a T27. Didn't I wrench on your Deda as well, Eric?

Re: Are Deda Ti bolts always this bad?

Posted: Mon Oct 07, 2013 7:11 pm
by ergott
One of.

Re: Are Deda Ti bolts always this bad?

Posted: Tue Oct 08, 2013 3:07 am
by RichTheRoadie
Had a bolt on a Deda stem snap recently before it got to 5Nm (yes, I was using a torque wrench!).

Re: Are Deda Ti bolts always this bad?

Posted: Tue Oct 08, 2013 4:55 am
by Rick
Substitute Ti bolts from Pro-Bolt and you will never have a problem.
Rolled rather than cut threads and better quality control.

Nice anodize colors also.

Re: Are Deda Ti bolts always this bad?

Posted: Tue Oct 08, 2013 7:32 am
by PSM
I buy my bolt from Ti-bolts U.K.

Dedas bartape snaps too... :(

Re: Are Deda Ti bolts always this bad?

Posted: Wed Oct 09, 2013 5:47 pm
by MajorMantra
To be honest I'd be as happy or happier replacing the bolts with good quality stainless steel. I'm having trouble finding such a thing though - can anyone point me to a reasonably priced source? Pro-Bolt mentioned above lists nice tapered head ones but they are absurdly expensive. Paying over £3 per bolt for steel seems mad.

Re: Are Deda Ti bolts always this bad?

Posted: Thu Oct 10, 2013 1:53 am
by prendrefeu
eBay?
The bolts are fairly standard, no? I might be mistaken, but from experience swapping bolts on an ol' Zero 100 stem it certainly seemed to be the case.
Most stems use the same size bolts.

Re: Are Deda Ti bolts always this bad?

Posted: Thu Oct 10, 2013 10:18 am
by MajorMantra
It's easy enough to buy bog standard socket cap bolts but nice ones with slimmer or tapered heads are harder to come by. And I'm trying to avoid anything claiming to be bike specific since that always inflates the price.

Re: Are Deda Ti bolts always this bad?

Posted: Thu Oct 10, 2013 11:10 pm
by bm0p700f
I have hundreds of stainless bolts. DJ Evens in Bury St Edmunds has a warehouse full but I am lazy and get mine from bike part distributors. My last lot came from fishers.

Re: Are Deda Ti bolts always this bad?

Posted: Fri Oct 11, 2013 1:22 am
by OwenJames
Yes. I broke a few with absolutely correct torque (digital torque wrench)

Re: Are Deda Ti bolts always this bad?

Posted: Fri Oct 11, 2013 4:22 am
by Rick
I broke quite a few bolts on 3T stems. I even went and bought a new torque wrench think I must have gone out of calibration, and they continued to break. A properly made Ti bolt should be as strong or stronger than steel, so I suspect some poor material in the supply line somewhere.
That is why certified material bolts with rolled treads and quality inspection costs more. It seems expensive until you figure the cost of breakage.
Of course the same could be said of everything, and I am riding a cheap asian frame, so we all assess our own cost/risk tolerance.

Re: Are Deda Ti bolts always this bad?

Posted: Fri Oct 11, 2013 8:21 am
by doozer
i bought the deda zero and swapped out the bolts with Ti ones from pro-bolt. cheaper overall and never had any issues.

Re: Are Deda Ti bolts always this bad?

Posted: Fri Oct 11, 2013 8:21 am
by Weenie