Handlebar dilemma

Discuss light weight issues concerning road bikes & parts.
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nealjp
Posts: 33
Joined: Fri Jan 27, 2012 12:10 pm

by nealjp

I've looked at so many handlebars that I have nightmares about them.

The Deda 35s on my Crisp titanium frame just doesn't cut it anymore. Mainly because I snapped a drop after hitting a minor road bump.

I'm flirting with the idea of aero style bars (1 or 2 piece, not TT) but I'm worried about how they would look with traditional tubing.

If you've matched aero bars with trad tubes, I'd love to see a pic!

by Weenie


alcatraz
Posts: 2209
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

Where did the drop snap? Are they carbon bars? Ultra light?

The pros often use alloy bars for their impact resiliance.

I've damaged bars at the stem clamp. After that I got myself some bontrager xxx copies and never had a problem since. Solid and light for me.

nealjp
Posts: 33
Joined: Fri Jan 27, 2012 12:10 pm

by nealjp

They snapped just below the brake lever clamp. I used a torque wrench but Deda wouldn't replace/credit.

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Calnago
Posts: 8532
Joined: Sun Nov 07, 2010 9:14 pm

by Calnago

That’s one place I do not use a torque wrench, and go by feel and judgement depending on several things.... bar material, bar weight (lighter bars are inherently more fragile), and the interface of the clamp on the curve. In the case of Campy for example, they recommend a torque spec of 10Nm on that clamp, which is whole lot of torque, and if the edge of the clamp against the curve of the bar is at all digging in, then I’m always aware of creating a possible stress riser. So I just go by feel here. Get it tight for sure, so that it stays put under all riding conditions, but I think that point comes way before 10Nm.
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Marin
Posts: 3521
Joined: Wed Jan 22, 2014 11:48 am
Location: Vienna Austria

by Marin

Many carbon drop bars are 3-piece, with the drops glued on to the tops. The joint is roughly where your bar failed. The area can be damaged invisibly if the bike falls over - it will land on the end of the drops and the leverage will torque the joint. Happened to me twice, on chinese carbon bars though.

Aero bars on round tubed frames - I always build my Ti and steel bikes like this:

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upside
Posts: 644
Joined: Fri Mar 09, 2007 1:26 am
Location: USA

by upside

Nice bike......Can't help you otherwise except do not buy Chinese knockoffs.

alcatraz
Posts: 2209
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

That's a bit harsh. Most chinese riders are flyweights 55-70kg so their stuff is mostly tested in that range.

Keep that in mind before ordering on alixpress and getting ultra light parts being 80-90-100kg.

My 95kg friend is using knockoff handlebars and he's very impressed. They have lasted many thousand kilometers and are light. So there are exceptions... check reviews!

TurboKoo
Posts: 537
Joined: Wed Oct 29, 2008 7:55 pm

by TurboKoo

But that is exactly what scares me, exemptions in manufacturing. Sometimes it can be good and sometimes it breaks. They should run 100% QC in their carbon products but then prices would rise.
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LocoDuck
Posts: 64
Joined: Sun Mar 24, 2013 7:24 pm
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by LocoDuck

One place I wouldn't skimp on his handlebars. Quite surprising how thin some handlebars are, even some aluminium ones I've had in the past were quite fragile and dented very easily, notably at the end of the drops despite the fact the frame was never crashed or dropped. Granted it could have been damaged in the shop before it bought it, either way I tend to go for the higher quality aluminium bars or carbon bars from more reputable brands where you may have some comeback if the bars were to fail.

Marin
Posts: 3521
Joined: Wed Jan 22, 2014 11:48 am
Location: Vienna Austria

by Marin

How has this become about chinese parts? The OP had a Deda bar break FFS!

alcatraz
Posts: 2209
Joined: Mon Aug 29, 2016 11:19 am

by alcatraz

The guy needs to buy new bars. If deda broke then all bets are off. Noone is safe. :lol:

...except probably alloy bars.

by Weenie


gramsqueen
Posts: 69
Joined: Wed Jun 27, 2018 5:15 am

by gramsqueen

3T haven’t broke yet :lol:

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