Cannondale CAAD7 Frame Durability Question

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11-12-07 | 03:13 PM

#26

stapfam

Time for a change.

Joined: Jan 2004

Posts: 19,913

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From: 6 miles inland from the coast of Sussex, in the South East of England

Bikes: Dale MT2000. Bianchi FS920 Kona Explosif. Giant TCR C. Boreas Ignis. Pinarello Fp Uno.

Quote:

Originally Posted by ShinyBaldy

I'll probably get flamed for saying so - but I don't think alum is the way to go when you're trying to get ultralight weight...

1) Alum is not as stiff as steel
2) Thus you need to use oversized tubing to make the frame stiff
3) oversized tubing and light weight = thin tubing
4) thin tubing = ?

there is a point where material qualities become the limit - is alum at the limit? I dunno - but I'm fairly certain at the same weight, there are some quite reliable crashable composites.

I am new to road biking but 15 years of aggressive mountain biking. 4 aluminium Bikes and one Steel. My latest bike- The one that I should have bought in the first place is a Boreas Ignis. This is a lightweight frame that with CF forks weighs 2lbs and a few ounces. No "Sqeezable" tubes on this frame and the tubing is not Greatly Oversized. And as to stiffness? Can't tell cos the CF forks and seatpost take all the buzz out of it. But It is stiff. Its only a 51cm frame but without costing a fortune- it is just over 15lbs.

Start talking about Commercial bikes and you are probably right- but there are one or six specialist frame makers out there that know what they are building.

https://www.boreas-bikes.dk/pages/ignis.html

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08-03-14 | 04:30 PM

#27

romanlotus

Fogey

Joined: Jan 2014

Posts: 135

Likes: 428

From: jersey city n.j.

Bikes: Lotus,Centurion,Panasonic,Trek,Cannondale,Medici,Araya,Peugeot,Motobecane

Keep your carbon crap.Metal is better.

08-03-14 | 05:33 PM

#28

Homebrew01

Super Moderator

Joined: Jul 2004

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From: Ffld Cnty Connecticut

Bikes: Old Steelies I made, Old Cannondales

Finally a 10 year old zombie thread. Recently they have only been 5 or 6 years old.

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