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Carbon Construction – Impact strength of carbon rims
From:
Bitey Apr 3, 2006, 8:44 AM
Question:
No Pave clincher rims? Why isn't there a pave version of clincher 404s? Or are they inherently stronger than the regular tubular 404s such that a pave version is unnecessary?
Josh:
No need for the Pave in the clincher as the carbon body acts as a leaf spring under the aluminum hoop allowing the hoop to absorb significantly higher shock loads than a standard aluminum rim. This is why you will see Mike Curiak and other ultra-distance mountain bikers using standard 505 rims on 29" mtn bikes. They have found that the rims last much longer than even standard mountain rims while providing improved ride quality (as well as killer mud shedding capacity). And no, we will not warranty the rims when used like this, but as for any conceivable road/pave/cyclocross usage, the clincher 303/404 wheels are some of the strongest ever produced.
Pictures at:
http://forum.slowtwitch.com/gforum.cgi?post=771857;search_string=joshatzipp;guest=10630024#771857Here's the race palmares from the set of 404's shown in the photos according to Mike: When I first received them I laced them up to Hugi 240 rim-brake hubs with stout (DT Competition) spokes, then I rode the $#!& out of them that season. A smattering of the events they were used for that year: 2002 142-mile Kokopelli Trail Race--1st place 2002 360-mile Grand Loop race--DNF 2002 24 Hour World Championships--2nd place, singlespeed After that long summer of riding, guiding, and racing, tickled with their performance but tired of rim brakes, I relaced the 404 rims with DT Swiss 240s disc-brake hubs, SuperComp spokes, and fitted them onto a new frame for the next season. Highlights from that year included: 2003 Kokopelli Trail Race--1st place, course record 2003 Grand Loop--1st place, course record 2003 2500-mile Great Divide Race--DNF 2003 24 Hour World Championships--2nd place, singlespeed In all the training and racing miles I rarely needed to true or tension the wheels, so I concluded that they were as-yet overbuilt. Following that season I again relaced the same set of 404 rims, this time using very light (DT Swiss Revolution) spokes. Then I installed them onto a new frame and went racing. 2004 Kokopelli Trail Race--1st place, course record 2004 2500-mile Great Divide Race--1st place, course record 2004 Sweet Roll 200 race--DNF
For the record that's 10,400 offroad miles. We now have the rear in our factory and the front hangs at the DTSwiss headquarters in Colorado.
Here’s a little more information on our Co-molding technlogy:
M2CM (Multi-Material Co-Molding)
http://www.zipp.com/M2CMMultiMaterialCoMolding/tabid/101/Default.aspx..