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PostPosted: Sun Aug 26, 2012 3:59 am 
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Joined: Thu Aug 16, 2012 12:56 am
Posts: 435
Location: YYZ
I stumbled across some Bontrager Race X Lite 700c 18-25 mm butyl tubes today weighing in at 66 grams (0.60 mm thick) with a 36 mm stem (incl. collar and cap). The XXX Lites (which i did not buy) were 58-ish on the shop scales. They were 2x the price...

I looked around to see if there was anything lighter and I'm a bit surprised to find that these seem to be some of the lightest (butyl) tubes I've found.

Quick completely un-scientific comparison: (not my weights - only what I've seen on a few web sites):

Michelin Aircomp Ultralight - 77 g (not sure what valve length)
Vittoria Ultralight - 84 g (not sure what valve length)
Conti Light - 99 g (not sure which size this weight was for)
Conti Supersonic - 45 g?
Maxxis MVS Flyweight - 46 g (these are 0.45 - same thickness as the XXX Lites)
Deda - 92 g w/ 40 mm stems

So I'm a bit surprised. Anyone else?

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Posted: Sun Aug 26, 2012 3:59 am 


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PostPosted: Sun Aug 26, 2012 4:23 am 
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Joined: Thu Sep 30, 2010 3:32 pm
Posts: 256
Location: S.E. TN
The Conti SS and Maxxis FWs are usually a little over 50gms, depending on the stem.


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PostPosted: Sun Aug 26, 2012 4:39 am 
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Location: so. cal.
Vredestein tubes weight 48gm
And challenge are 59-65
But they are latex.

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PostPosted: Mon Aug 27, 2012 6:50 am 
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Joined: Fri Feb 24, 2012 5:43 am
Posts: 39
Location: San Diego
My new Specialized turbo tubes weighed in at 49g and are butyl. Haven't mounted them yet to test.


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PostPosted: Mon Aug 27, 2012 7:30 am 
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Joined: Thu Jul 19, 2012 6:09 pm
Posts: 122
Location: Loveland, CO
I just got some Conti SS 42mm and they weighed in at 50g. They definitely roll better than the stock tubes (96g.) I run anywhere from 110 to 120 psi. So far only three rides on them and I don't know anything about long-term durability. However I'm very impressed by the extra speed they give.


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PostPosted: Mon Aug 27, 2012 8:00 pm 
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The Specialized Turbo tubes are light (I think mine weighed 58?) and are nice. They hold up well and come pre-talced and wrapped tightly for a jersey pocket.

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PostPosted: Mon Aug 27, 2012 10:05 pm 
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Location: New Zealand
What about the Vittoria Evo 55gm Image

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PostPosted: Tue Aug 28, 2012 9:04 am 
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Joined: Fri Dec 23, 2011 10:09 pm
Posts: 35
Location: Vancouver, Canada
Which of these lightweight tubes have removable valve cores so that I can put in tofu extenders and get at least 60mm of stem? I've been riding on the Michelin Aircomp Ultralight 60mm valve stems (non-removable cores) while thinking they're the greatest thing since sliced bread. Now that I've read about these other (waay lighter) options I'm left a little deflated! Pun intended.


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PostPosted: Wed Aug 29, 2012 1:48 am 
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Location: so. cal.
the two latex tubes that i sugested have removable valves.


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PostPosted: Wed Aug 29, 2012 3:47 am 
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The Conti SS are advertised as removable core, though I can't confirm


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Posted: Wed Aug 29, 2012 3:47 am 


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PostPosted: Wed Aug 29, 2012 4:54 pm 
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Posts: 122
Location: Loveland, CO
Conti SS does have removable valves. I use Conti valve extenders and they work great along with Conti SS. Yesterday on a ride I hit 50mph on a descent. Not quite a supersonic speed but not too bad for my light body (60kg).


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