I could be wrong, but AFAIK lower grade carbon frames are more durable than high grade ones.
Higher wall thickness and higher epoxy ratios create a less brittle structure in out of plane stresses(outside impacts) and also reduces the “soda-can” effect, which is the feeling you get when you can squeeze the top tube with your thumb.
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Giant Propel SL Top Tube Crack. Is it too fragile?
Moderator: robbosmans
SHUT UP LEGS
2015 Giant Propel Advanced
2015 Cannondale Supersix Evo
2013 KTM Strada mod. (totaled)
2011 Pinarello Dogma 60.1(loaner)
2011 Scott SUB 45(sold)
Politecnico di Milano Ingegneria Meccanica
2015 Giant Propel Advanced
2015 Cannondale Supersix Evo
2013 KTM Strada mod. (totaled)
2011 Pinarello Dogma 60.1(loaner)
2011 Scott SUB 45(sold)
Politecnico di Milano Ingegneria Meccanica
Pretty much. Stiffer/higher grades tend to be more brittle. You can mitigate by how you lay up and what resin % you use and so on. But essentially higher grade composites = less tough.
Thats why frames tend to not use all of one high grade, usually have a mix T700 and T800. Can stiffen up key parts by swapping 100 grams of low grade for 100 grams of high grade and so on.
Not a simple equation, but generally speaking.
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